/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/egcd3-ll.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 07:18:18,299 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 07:18:18,303 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 07:18:18,369 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-23 07:18:18,369 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-23 07:18:18,375 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-23 07:18:18,379 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-23 07:18:18,385 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-23 07:18:18,389 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-23 07:18:18,396 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-23 07:18:18,401 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-23 07:18:18,403 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-23 07:18:18,404 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 07:18:18,409 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 07:18:18,412 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 07:18:18,414 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 07:18:18,415 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 07:18:18,419 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 07:18:18,428 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 07:18:18,445 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 07:18:18,447 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 07:18:18,449 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 07:18:18,451 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 07:18:18,452 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 07:18:18,455 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-23 07:18:18,459 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-23 07:18:18,460 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-23 07:18:18,461 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-23 07:18:18,462 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-23 07:18:18,464 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-23 07:18:18,464 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-23 07:18:18,465 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-23 07:18:18,465 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-23 07:18:18,466 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 07:18:18,467 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 07:18:18,468 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 07:18:18,471 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-23 07:18:18,499 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 07:18:18,499 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 07:18:18,501 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 07:18:18,501 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 07:18:18,502 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 07:18:18,502 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 07:18:18,502 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 07:18:18,502 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 07:18:18,502 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-23 07:18:18,503 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 07:18:18,503 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-23 07:18:18,503 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-23 07:18:18,503 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 07:18:18,503 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-23 07:18:18,504 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 07:18:18,504 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 07:18:18,504 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 07:18:18,504 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 07:18:18,504 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 07:18:18,505 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 07:18:18,505 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-23 07:18:18,505 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 07:18:18,505 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 07:18:18,505 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-23 07:18:18,506 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 07:18:18,506 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 07:18:18,997 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 07:18:19,041 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 07:18:19,045 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 07:18:19,046 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 07:18:19,047 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 07:18:19,048 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench/egcd3-ll.c [2020-12-23 07:18:19,154 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/8a1d2573f/704c657a35764a91b2d5ac185de8a347/FLAGee7957231 [2020-12-23 07:18:19,922 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 07:18:19,923 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/nla-digbench/egcd3-ll.c [2020-12-23 07:18:19,933 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/8a1d2573f/704c657a35764a91b2d5ac185de8a347/FLAGee7957231 [2020-12-23 07:18:20,237 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/8a1d2573f/704c657a35764a91b2d5ac185de8a347 [2020-12-23 07:18:20,247 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 07:18:20,250 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 07:18:20,254 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 07:18:20,255 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 07:18:20,259 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 07:18:20,261 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 07:18:20" (1/1) ... [2020-12-23 07:18:20,263 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7763ae78 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:18:20, skipping insertion in model container [2020-12-23 07:18:20,263 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 07:18:20" (1/1) ... [2020-12-23 07:18:20,272 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 07:18:20,300 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-23 07:18:20,513 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/egcd3-ll.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,] [2020-12-23 07:18:20,539 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 07:18:20,553 INFO L203 MainTranslator]: Completed pre-run [2020-12-23 07:18:20,565 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/egcd3-ll.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,] [2020-12-23 07:18:20,581 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 07:18:20,599 INFO L208 MainTranslator]: Completed translation [2020-12-23 07:18:20,600 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:18:20 WrapperNode [2020-12-23 07:18:20,600 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 07:18:20,602 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 07:18:20,602 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 07:18:20,602 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 07:18:20,611 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:18:20" (1/1) ... [2020-12-23 07:18:20,619 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:18:20" (1/1) ... [2020-12-23 07:18:20,644 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 07:18:20,645 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 07:18:20,645 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 07:18:20,646 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 07:18:20,656 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:18:20" (1/1) ... [2020-12-23 07:18:20,656 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:18:20" (1/1) ... [2020-12-23 07:18:20,658 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:18:20" (1/1) ... [2020-12-23 07:18:20,659 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:18:20" (1/1) ... [2020-12-23 07:18:20,663 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:18:20" (1/1) ... [2020-12-23 07:18:20,669 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:18:20" (1/1) ... [2020-12-23 07:18:20,671 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:18:20" (1/1) ... [2020-12-23 07:18:20,674 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 07:18:20,675 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 07:18:20,675 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 07:18:20,675 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 07:18:20,676 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:18:20" (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 [2020-12-23 07:18:20,772 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-23 07:18:20,773 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 07:18:20,773 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 07:18:20,773 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 07:18:21,099 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 07:18:21,100 INFO L299 CfgBuilder]: Removed 21 assume(true) statements. [2020-12-23 07:18:21,102 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 07:18:21 BoogieIcfgContainer [2020-12-23 07:18:21,102 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 07:18:21,104 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 07:18:21,104 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 07:18:21,108 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 07:18:21,109 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 07:18:20" (1/3) ... [2020-12-23 07:18:21,109 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3dfcb399 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 07:18:21, skipping insertion in model container [2020-12-23 07:18:21,110 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:18:20" (2/3) ... [2020-12-23 07:18:21,110 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3dfcb399 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 07:18:21, skipping insertion in model container [2020-12-23 07:18:21,110 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 07:18:21" (3/3) ... [2020-12-23 07:18:21,112 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd3-ll.c [2020-12-23 07:18:21,120 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 07:18:21,125 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 5 error locations. [2020-12-23 07:18:21,147 INFO L253 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2020-12-23 07:18:21,179 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 07:18:21,179 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-23 07:18:21,180 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 07:18:21,180 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 07:18:21,180 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 07:18:21,180 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 07:18:21,180 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 07:18:21,181 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 07:18:21,202 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states. [2020-12-23 07:18:21,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-23 07:18:21,211 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:18:21,212 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:18:21,213 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]=== [2020-12-23 07:18:21,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:18:21,226 INFO L82 PathProgramCache]: Analyzing trace with hash -1236053721, now seen corresponding path program 1 times [2020-12-23 07:18:21,252 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:18:21,253 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128505729] [2020-12-23 07:18:21,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:18:21,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:18:21,522 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:18:21,524 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128505729] [2020-12-23 07:18:21,525 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 07:18:21,525 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-23 07:18:21,526 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837122041] [2020-12-23 07:18:21,532 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-23 07:18:21,532 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:18:21,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-23 07:18:21,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-23 07:18:21,553 INFO L87 Difference]: Start difference. First operand 37 states. Second operand 2 states. [2020-12-23 07:18:21,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:18:21,577 INFO L93 Difference]: Finished difference Result 71 states and 100 transitions. [2020-12-23 07:18:21,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-23 07:18:21,579 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-12-23 07:18:21,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:18:21,589 INFO L225 Difference]: With dead ends: 71 [2020-12-23 07:18:21,590 INFO L226 Difference]: Without dead ends: 33 [2020-12-23 07:18:21,593 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 [2020-12-23 07:18:21,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-12-23 07:18:21,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-12-23 07:18:21,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-12-23 07:18:21,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2020-12-23 07:18:21,636 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 10 [2020-12-23 07:18:21,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:18:21,636 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2020-12-23 07:18:21,636 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-23 07:18:21,637 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2020-12-23 07:18:21,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-23 07:18:21,637 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:18:21,638 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:18:21,638 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-23 07:18:21,639 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]=== [2020-12-23 07:18:21,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:18:21,640 INFO L82 PathProgramCache]: Analyzing trace with hash -1503549271, now seen corresponding path program 1 times [2020-12-23 07:18:21,640 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:18:21,641 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772753546] [2020-12-23 07:18:21,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:18:21,668 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:18:21,669 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1911689684] [2020-12-23 07:18:21,669 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 [2020-12-23 07:18:21,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:18:21,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-23 07:18:21,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:18:21,884 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:18:21,886 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772753546] [2020-12-23 07:18:21,886 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:18:21,887 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1911689684] [2020-12-23 07:18:21,887 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 07:18:21,888 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-23 07:18:21,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902019944] [2020-12-23 07:18:21,893 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 07:18:21,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:18:21,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 07:18:21,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-23 07:18:21,900 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand 5 states. [2020-12-23 07:18:22,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:18:22,018 INFO L93 Difference]: Finished difference Result 60 states and 64 transitions. [2020-12-23 07:18:22,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 07:18:22,019 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2020-12-23 07:18:22,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:18:22,021 INFO L225 Difference]: With dead ends: 60 [2020-12-23 07:18:22,021 INFO L226 Difference]: Without dead ends: 56 [2020-12-23 07:18:22,022 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-23 07:18:22,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-12-23 07:18:22,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 35. [2020-12-23 07:18:22,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-12-23 07:18:22,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2020-12-23 07:18:22,033 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 11 [2020-12-23 07:18:22,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:18:22,034 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2020-12-23 07:18:22,034 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 07:18:22,034 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2020-12-23 07:18:22,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-23 07:18:22,035 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:18:22,035 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:18:22,250 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-12-23 07:18:22,252 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]=== [2020-12-23 07:18:22,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:18:22,254 INFO L82 PathProgramCache]: Analyzing trace with hash -1815125850, now seen corresponding path program 1 times [2020-12-23 07:18:22,254 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:18:22,255 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256634709] [2020-12-23 07:18:22,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:18:22,283 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:18:22,283 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1296915439] [2020-12-23 07:18:22,283 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 [2020-12-23 07:18:22,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:18:22,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-23 07:18:22,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:18:22,412 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:18:22,414 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256634709] [2020-12-23 07:18:22,415 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:18:22,416 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1296915439] [2020-12-23 07:18:22,416 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 07:18:22,416 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-23 07:18:22,417 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772299000] [2020-12-23 07:18:22,418 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 07:18:22,418 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:18:22,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 07:18:22,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-23 07:18:22,420 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand 6 states. [2020-12-23 07:18:22,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:18:22,569 INFO L93 Difference]: Finished difference Result 56 states and 60 transitions. [2020-12-23 07:18:22,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-23 07:18:22,570 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 13 [2020-12-23 07:18:22,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:18:22,573 INFO L225 Difference]: With dead ends: 56 [2020-12-23 07:18:22,573 INFO L226 Difference]: Without dead ends: 54 [2020-12-23 07:18:22,574 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-12-23 07:18:22,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-12-23 07:18:22,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 47. [2020-12-23 07:18:22,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-12-23 07:18:22,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 54 transitions. [2020-12-23 07:18:22,609 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 54 transitions. Word has length 13 [2020-12-23 07:18:22,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:18:22,609 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 54 transitions. [2020-12-23 07:18:22,609 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 07:18:22,610 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 54 transitions. [2020-12-23 07:18:22,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-23 07:18:22,611 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:18:22,611 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:18:22,819 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:18:22,820 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]=== [2020-12-23 07:18:22,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:18:22,821 INFO L82 PathProgramCache]: Analyzing trace with hash -579062807, now seen corresponding path program 1 times [2020-12-23 07:18:22,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:18:22,822 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71080288] [2020-12-23 07:18:22,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:18:22,839 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:18:22,839 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1142336700] [2020-12-23 07:18:22,839 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 [2020-12-23 07:18:22,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:18:22,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 22 conjunts are in the unsatisfiable core [2020-12-23 07:18:22,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:18:23,045 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:18:23,046 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71080288] [2020-12-23 07:18:23,046 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:18:23,046 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1142336700] [2020-12-23 07:18:23,047 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 07:18:23,047 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-23 07:18:23,047 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388484754] [2020-12-23 07:18:23,048 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-23 07:18:23,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:18:23,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-23 07:18:23,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-12-23 07:18:23,050 INFO L87 Difference]: Start difference. First operand 47 states and 54 transitions. Second operand 8 states. [2020-12-23 07:18:23,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:18:23,255 INFO L93 Difference]: Finished difference Result 54 states and 58 transitions. [2020-12-23 07:18:23,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-23 07:18:23,255 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 15 [2020-12-23 07:18:23,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:18:23,256 INFO L225 Difference]: With dead ends: 54 [2020-12-23 07:18:23,256 INFO L226 Difference]: Without dead ends: 52 [2020-12-23 07:18:23,257 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2020-12-23 07:18:23,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-12-23 07:18:23,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 47. [2020-12-23 07:18:23,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-12-23 07:18:23,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 53 transitions. [2020-12-23 07:18:23,265 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 53 transitions. Word has length 15 [2020-12-23 07:18:23,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:18:23,266 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 53 transitions. [2020-12-23 07:18:23,266 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-23 07:18:23,266 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 53 transitions. [2020-12-23 07:18:23,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-23 07:18:23,267 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:18:23,267 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:18:23,482 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:18:23,483 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]=== [2020-12-23 07:18:23,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:18:23,485 INFO L82 PathProgramCache]: Analyzing trace with hash -977126190, now seen corresponding path program 1 times [2020-12-23 07:18:23,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:18:23,486 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145353137] [2020-12-23 07:18:23,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:18:23,502 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:18:23,503 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1961907086] [2020-12-23 07:18:23,503 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 [2020-12-23 07:18:23,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:18:23,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-23 07:18:23,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:18:23,621 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:18:23,622 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145353137] [2020-12-23 07:18:23,622 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:18:23,622 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1961907086] [2020-12-23 07:18:23,622 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:18:23,622 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-12-23 07:18:23,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135414138] [2020-12-23 07:18:23,623 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-23 07:18:23,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:18:23,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-23 07:18:23,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-12-23 07:18:23,625 INFO L87 Difference]: Start difference. First operand 47 states and 53 transitions. Second operand 7 states. [2020-12-23 07:18:23,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:18:23,788 INFO L93 Difference]: Finished difference Result 136 states and 153 transitions. [2020-12-23 07:18:23,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-23 07:18:23,788 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 16 [2020-12-23 07:18:23,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:18:23,790 INFO L225 Difference]: With dead ends: 136 [2020-12-23 07:18:23,790 INFO L226 Difference]: Without dead ends: 132 [2020-12-23 07:18:23,791 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-12-23 07:18:23,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-12-23 07:18:23,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 71. [2020-12-23 07:18:23,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-12-23 07:18:23,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 87 transitions. [2020-12-23 07:18:23,804 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 87 transitions. Word has length 16 [2020-12-23 07:18:23,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:18:23,804 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 87 transitions. [2020-12-23 07:18:23,804 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-23 07:18:23,804 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 87 transitions. [2020-12-23 07:18:23,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-23 07:18:23,805 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:18:23,805 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:18:24,020 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:18:24,021 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]=== [2020-12-23 07:18:24,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:18:24,023 INFO L82 PathProgramCache]: Analyzing trace with hash 1866548172, now seen corresponding path program 1 times [2020-12-23 07:18:24,024 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:18:24,024 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107261358] [2020-12-23 07:18:24,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:18:24,047 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:18:24,048 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1090411387] [2020-12-23 07:18:24,048 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 [2020-12-23 07:18:24,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:18:24,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-23 07:18:24,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:18:24,216 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:18:24,217 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107261358] [2020-12-23 07:18:24,217 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:18:24,217 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1090411387] [2020-12-23 07:18:24,218 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 07:18:24,224 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-23 07:18:24,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759637594] [2020-12-23 07:18:24,229 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-23 07:18:24,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:18:24,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-23 07:18:24,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-12-23 07:18:24,233 INFO L87 Difference]: Start difference. First operand 71 states and 87 transitions. Second operand 8 states. [2020-12-23 07:18:24,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:18:24,503 INFO L93 Difference]: Finished difference Result 91 states and 106 transitions. [2020-12-23 07:18:24,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-23 07:18:24,503 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 17 [2020-12-23 07:18:24,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:18:24,506 INFO L225 Difference]: With dead ends: 91 [2020-12-23 07:18:24,507 INFO L226 Difference]: Without dead ends: 89 [2020-12-23 07:18:24,508 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2020-12-23 07:18:24,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-12-23 07:18:24,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 80. [2020-12-23 07:18:24,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-12-23 07:18:24,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 98 transitions. [2020-12-23 07:18:24,535 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 98 transitions. Word has length 17 [2020-12-23 07:18:24,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:18:24,536 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 98 transitions. [2020-12-23 07:18:24,536 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-23 07:18:24,536 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 98 transitions. [2020-12-23 07:18:24,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-23 07:18:24,537 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:18:24,537 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:18:24,750 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-12-23 07:18:24,751 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]=== [2020-12-23 07:18:24,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:18:24,752 INFO L82 PathProgramCache]: Analyzing trace with hash 1566281359, now seen corresponding path program 1 times [2020-12-23 07:18:24,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:18:24,753 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802629832] [2020-12-23 07:18:24,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:18:24,767 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:18:24,768 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1629244560] [2020-12-23 07:18:24,768 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 [2020-12-23 07:18:24,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:18:24,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 25 conjunts are in the unsatisfiable core [2020-12-23 07:18:24,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:18:24,928 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:18:24,929 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802629832] [2020-12-23 07:18:24,929 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:18:24,929 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1629244560] [2020-12-23 07:18:24,929 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:18:24,929 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-12-23 07:18:24,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429038332] [2020-12-23 07:18:24,930 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-23 07:18:24,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:18:24,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-23 07:18:24,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-12-23 07:18:24,931 INFO L87 Difference]: Start difference. First operand 80 states and 98 transitions. Second operand 7 states. [2020-12-23 07:18:25,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:18:25,102 INFO L93 Difference]: Finished difference Result 131 states and 156 transitions. [2020-12-23 07:18:25,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-23 07:18:25,103 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 18 [2020-12-23 07:18:25,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:18:25,104 INFO L225 Difference]: With dead ends: 131 [2020-12-23 07:18:25,104 INFO L226 Difference]: Without dead ends: 129 [2020-12-23 07:18:25,105 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-12-23 07:18:25,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-12-23 07:18:25,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 112. [2020-12-23 07:18:25,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-12-23 07:18:25,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 142 transitions. [2020-12-23 07:18:25,119 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 142 transitions. Word has length 18 [2020-12-23 07:18:25,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:18:25,119 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 142 transitions. [2020-12-23 07:18:25,119 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-23 07:18:25,119 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 142 transitions. [2020-12-23 07:18:25,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-23 07:18:25,120 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:18:25,120 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:18:25,335 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:18:25,336 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]=== [2020-12-23 07:18:25,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:18:25,337 INFO L82 PathProgramCache]: Analyzing trace with hash -1543378865, now seen corresponding path program 1 times [2020-12-23 07:18:25,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:18:25,338 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570144597] [2020-12-23 07:18:25,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:18:25,357 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:18:25,358 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1273432129] [2020-12-23 07:18:25,358 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 [2020-12-23 07:18:25,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:18:25,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-23 07:18:25,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:18:25,470 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:18:25,471 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570144597] [2020-12-23 07:18:25,471 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:18:25,472 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1273432129] [2020-12-23 07:18:25,472 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 07:18:25,472 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-23 07:18:25,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982298802] [2020-12-23 07:18:25,473 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 07:18:25,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:18:25,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 07:18:25,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-23 07:18:25,474 INFO L87 Difference]: Start difference. First operand 112 states and 142 transitions. Second operand 5 states. [2020-12-23 07:18:25,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:18:25,616 INFO L93 Difference]: Finished difference Result 222 states and 283 transitions. [2020-12-23 07:18:25,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 07:18:25,617 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2020-12-23 07:18:25,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:18:25,621 INFO L225 Difference]: With dead ends: 222 [2020-12-23 07:18:25,621 INFO L226 Difference]: Without dead ends: 220 [2020-12-23 07:18:25,622 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-12-23 07:18:25,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2020-12-23 07:18:25,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 160. [2020-12-23 07:18:25,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-12-23 07:18:25,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 201 transitions. [2020-12-23 07:18:25,688 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 201 transitions. Word has length 19 [2020-12-23 07:18:25,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:18:25,688 INFO L481 AbstractCegarLoop]: Abstraction has 160 states and 201 transitions. [2020-12-23 07:18:25,688 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 07:18:25,689 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 201 transitions. [2020-12-23 07:18:25,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-23 07:18:25,689 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:18:25,690 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:18:25,890 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:18:25,891 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]=== [2020-12-23 07:18:25,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:18:25,892 INFO L82 PathProgramCache]: Analyzing trace with hash 1957989266, now seen corresponding path program 1 times [2020-12-23 07:18:25,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:18:25,893 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603500659] [2020-12-23 07:18:25,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:18:25,922 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:18:25,923 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [175023402] [2020-12-23 07:18:25,923 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 [2020-12-23 07:18:25,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:18:25,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 38 conjunts are in the unsatisfiable core [2020-12-23 07:18:26,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:18:26,174 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:18:26,174 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603500659] [2020-12-23 07:18:26,175 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:18:26,175 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [175023402] [2020-12-23 07:18:26,175 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:18:26,175 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-12-23 07:18:26,175 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109503599] [2020-12-23 07:18:26,176 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-23 07:18:26,176 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:18:26,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-23 07:18:26,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-12-23 07:18:26,177 INFO L87 Difference]: Start difference. First operand 160 states and 201 transitions. Second operand 10 states. [2020-12-23 07:18:26,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:18:26,773 INFO L93 Difference]: Finished difference Result 175 states and 210 transitions. [2020-12-23 07:18:26,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-23 07:18:26,774 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 20 [2020-12-23 07:18:26,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:18:26,775 INFO L225 Difference]: With dead ends: 175 [2020-12-23 07:18:26,775 INFO L226 Difference]: Without dead ends: 173 [2020-12-23 07:18:26,776 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2020-12-23 07:18:26,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-12-23 07:18:26,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 160. [2020-12-23 07:18:26,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-12-23 07:18:26,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 199 transitions. [2020-12-23 07:18:26,799 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 199 transitions. Word has length 20 [2020-12-23 07:18:26,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:18:26,800 INFO L481 AbstractCegarLoop]: Abstraction has 160 states and 199 transitions. [2020-12-23 07:18:26,800 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-23 07:18:26,800 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 199 transitions. [2020-12-23 07:18:26,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-12-23 07:18:26,801 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:18:26,801 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:18:27,015 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-12-23 07:18:27,016 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]=== [2020-12-23 07:18:27,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:18:27,018 INFO L82 PathProgramCache]: Analyzing trace with hash 432166197, now seen corresponding path program 1 times [2020-12-23 07:18:27,018 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:18:27,019 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449974138] [2020-12-23 07:18:27,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:18:27,032 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:18:27,032 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [373679342] [2020-12-23 07:18:27,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-23 07:18:27,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:18:27,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-23 07:18:27,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:18:27,201 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:18:27,201 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449974138] [2020-12-23 07:18:27,201 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:18:27,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [373679342] [2020-12-23 07:18:27,202 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:18:27,202 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-12-23 07:18:27,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716577013] [2020-12-23 07:18:27,203 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-23 07:18:27,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:18:27,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-23 07:18:27,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-12-23 07:18:27,204 INFO L87 Difference]: Start difference. First operand 160 states and 199 transitions. Second operand 9 states. [2020-12-23 07:18:27,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:18:27,519 INFO L93 Difference]: Finished difference Result 273 states and 324 transitions. [2020-12-23 07:18:27,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-23 07:18:27,520 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 22 [2020-12-23 07:18:27,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:18:27,522 INFO L225 Difference]: With dead ends: 273 [2020-12-23 07:18:27,522 INFO L226 Difference]: Without dead ends: 271 [2020-12-23 07:18:27,523 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2020-12-23 07:18:27,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2020-12-23 07:18:27,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 194. [2020-12-23 07:18:27,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2020-12-23 07:18:27,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 241 transitions. [2020-12-23 07:18:27,548 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 241 transitions. Word has length 22 [2020-12-23 07:18:27,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:18:27,549 INFO L481 AbstractCegarLoop]: Abstraction has 194 states and 241 transitions. [2020-12-23 07:18:27,549 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-23 07:18:27,549 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 241 transitions. [2020-12-23 07:18:27,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-12-23 07:18:27,550 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:18:27,550 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:18:27,763 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:18:27,764 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]=== [2020-12-23 07:18:27,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:18:27,765 INFO L82 PathProgramCache]: Analyzing trace with hash 50113094, now seen corresponding path program 2 times [2020-12-23 07:18:27,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:18:27,765 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497619074] [2020-12-23 07:18:27,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:18:27,778 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:18:27,779 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1398984655] [2020-12-23 07:18:27,779 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:18:27,828 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 07:18:27,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:18:27,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-23 07:18:27,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:18:27,909 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:18:27,910 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497619074] [2020-12-23 07:18:27,910 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:18:27,910 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1398984655] [2020-12-23 07:18:27,911 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 07:18:27,911 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-23 07:18:27,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375253766] [2020-12-23 07:18:27,911 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 07:18:27,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:18:27,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 07:18:27,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-23 07:18:27,913 INFO L87 Difference]: Start difference. First operand 194 states and 241 transitions. Second operand 5 states. [2020-12-23 07:18:28,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:18:28,041 INFO L93 Difference]: Finished difference Result 287 states and 351 transitions. [2020-12-23 07:18:28,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 07:18:28,042 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 23 [2020-12-23 07:18:28,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:18:28,043 INFO L225 Difference]: With dead ends: 287 [2020-12-23 07:18:28,043 INFO L226 Difference]: Without dead ends: 205 [2020-12-23 07:18:28,044 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-23 07:18:28,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2020-12-23 07:18:28,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 151. [2020-12-23 07:18:28,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2020-12-23 07:18:28,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 179 transitions. [2020-12-23 07:18:28,069 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 179 transitions. Word has length 23 [2020-12-23 07:18:28,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:18:28,069 INFO L481 AbstractCegarLoop]: Abstraction has 151 states and 179 transitions. [2020-12-23 07:18:28,069 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 07:18:28,069 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 179 transitions. [2020-12-23 07:18:28,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-12-23 07:18:28,071 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:18:28,071 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, 1, 1, 1, 1, 1] [2020-12-23 07:18:28,285 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:18:28,286 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]=== [2020-12-23 07:18:28,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:18:28,287 INFO L82 PathProgramCache]: Analyzing trace with hash -710666819, now seen corresponding path program 1 times [2020-12-23 07:18:28,288 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:18:28,288 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788479624] [2020-12-23 07:18:28,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:18:28,303 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:18:28,303 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [959467159] [2020-12-23 07:18:28,303 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 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 [2020-12-23 07:18:28,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:18:28,360 WARN L261 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 67 conjunts are in the unsatisfiable core [2020-12-23 07:18:28,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:18:28,864 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:18:28,865 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788479624] [2020-12-23 07:18:28,865 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:18:28,865 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [959467159] [2020-12-23 07:18:28,865 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:18:28,865 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-12-23 07:18:28,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681430945] [2020-12-23 07:18:28,866 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-23 07:18:28,866 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:18:28,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-23 07:18:28,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2020-12-23 07:18:28,867 INFO L87 Difference]: Start difference. First operand 151 states and 179 transitions. Second operand 14 states. [2020-12-23 07:18:29,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:18:29,679 INFO L93 Difference]: Finished difference Result 278 states and 329 transitions. [2020-12-23 07:18:29,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-23 07:18:29,680 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 28 [2020-12-23 07:18:29,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:18:29,682 INFO L225 Difference]: With dead ends: 278 [2020-12-23 07:18:29,682 INFO L226 Difference]: Without dead ends: 194 [2020-12-23 07:18:29,683 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=100, Invalid=362, Unknown=0, NotChecked=0, Total=462 [2020-12-23 07:18:29,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2020-12-23 07:18:29,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 160. [2020-12-23 07:18:29,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-12-23 07:18:29,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 189 transitions. [2020-12-23 07:18:29,705 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 189 transitions. Word has length 28 [2020-12-23 07:18:29,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:18:29,706 INFO L481 AbstractCegarLoop]: Abstraction has 160 states and 189 transitions. [2020-12-23 07:18:29,706 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-23 07:18:29,706 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 189 transitions. [2020-12-23 07:18:29,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-12-23 07:18:29,707 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:18:29,707 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:18:29,922 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-12-23 07:18:29,923 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]=== [2020-12-23 07:18:29,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:18:29,924 INFO L82 PathProgramCache]: Analyzing trace with hash -584499604, now seen corresponding path program 1 times [2020-12-23 07:18:29,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:18:29,924 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470747439] [2020-12-23 07:18:29,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:18:29,937 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:18:29,938 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1091793680] [2020-12-23 07:18:29,938 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 [2020-12-23 07:18:30,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:18:30,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 28 conjunts are in the unsatisfiable core [2020-12-23 07:18:30,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:18:30,134 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:18:30,134 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470747439] [2020-12-23 07:18:30,134 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:18:30,135 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1091793680] [2020-12-23 07:18:30,136 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:18:30,136 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-12-23 07:18:30,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350681865] [2020-12-23 07:18:30,136 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-23 07:18:30,137 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:18:30,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-23 07:18:30,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-12-23 07:18:30,138 INFO L87 Difference]: Start difference. First operand 160 states and 189 transitions. Second operand 9 states. [2020-12-23 07:18:30,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:18:30,561 INFO L93 Difference]: Finished difference Result 207 states and 240 transitions. [2020-12-23 07:18:30,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-23 07:18:30,562 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 28 [2020-12-23 07:18:30,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:18:30,564 INFO L225 Difference]: With dead ends: 207 [2020-12-23 07:18:30,564 INFO L226 Difference]: Without dead ends: 205 [2020-12-23 07:18:30,564 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2020-12-23 07:18:30,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2020-12-23 07:18:30,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 177. [2020-12-23 07:18:30,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2020-12-23 07:18:30,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 208 transitions. [2020-12-23 07:18:30,585 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 208 transitions. Word has length 28 [2020-12-23 07:18:30,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:18:30,585 INFO L481 AbstractCegarLoop]: Abstraction has 177 states and 208 transitions. [2020-12-23 07:18:30,586 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-23 07:18:30,586 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 208 transitions. [2020-12-23 07:18:30,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-12-23 07:18:30,587 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:18:30,587 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-23 07:18:30,801 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-12-23 07:18:30,801 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]=== [2020-12-23 07:18:30,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:18:30,802 INFO L82 PathProgramCache]: Analyzing trace with hash 878393524, now seen corresponding path program 2 times [2020-12-23 07:18:30,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:18:30,802 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771868818] [2020-12-23 07:18:30,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:18:30,813 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:18:30,813 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [981622891] [2020-12-23 07:18:30,814 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 [2020-12-23 07:18:30,870 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 07:18:30,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:18:30,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-23 07:18:30,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:18:30,953 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:18:30,953 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771868818] [2020-12-23 07:18:30,953 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:18:30,954 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [981622891] [2020-12-23 07:18:30,954 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:18:30,954 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-12-23 07:18:30,954 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544634405] [2020-12-23 07:18:30,955 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-23 07:18:30,955 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:18:30,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-23 07:18:30,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-12-23 07:18:30,956 INFO L87 Difference]: Start difference. First operand 177 states and 208 transitions. Second operand 8 states. [2020-12-23 07:18:31,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:18:31,356 INFO L93 Difference]: Finished difference Result 398 states and 467 transitions. [2020-12-23 07:18:31,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-23 07:18:31,357 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 33 [2020-12-23 07:18:31,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:18:31,359 INFO L225 Difference]: With dead ends: 398 [2020-12-23 07:18:31,360 INFO L226 Difference]: Without dead ends: 394 [2020-12-23 07:18:31,361 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=249, Unknown=0, NotChecked=0, Total=342 [2020-12-23 07:18:31,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2020-12-23 07:18:31,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 217. [2020-12-23 07:18:31,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 217 states. [2020-12-23 07:18:31,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 261 transitions. [2020-12-23 07:18:31,390 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 261 transitions. Word has length 33 [2020-12-23 07:18:31,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:18:31,390 INFO L481 AbstractCegarLoop]: Abstraction has 217 states and 261 transitions. [2020-12-23 07:18:31,390 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-23 07:18:31,390 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 261 transitions. [2020-12-23 07:18:31,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-12-23 07:18:31,392 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:18:31,393 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:18:31,607 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-23 07:18:31,608 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]=== [2020-12-23 07:18:31,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:18:31,609 INFO L82 PathProgramCache]: Analyzing trace with hash 1004560739, now seen corresponding path program 1 times [2020-12-23 07:18:31,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:18:31,609 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151542633] [2020-12-23 07:18:31,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:18:31,620 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:18:31,620 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1612550176] [2020-12-23 07:18:31,620 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 [2020-12-23 07:18:31,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:18:31,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 27 conjunts are in the unsatisfiable core [2020-12-23 07:18:31,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:18:31,834 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:18:31,834 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151542633] [2020-12-23 07:18:31,835 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:18:31,835 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1612550176] [2020-12-23 07:18:31,835 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:18:31,835 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-12-23 07:18:31,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649560918] [2020-12-23 07:18:31,836 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-23 07:18:31,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:18:31,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-23 07:18:31,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-12-23 07:18:31,837 INFO L87 Difference]: Start difference. First operand 217 states and 261 transitions. Second operand 10 states. [2020-12-23 07:18:32,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:18:32,401 INFO L93 Difference]: Finished difference Result 359 states and 424 transitions. [2020-12-23 07:18:32,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-23 07:18:32,401 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 33 [2020-12-23 07:18:32,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:18:32,404 INFO L225 Difference]: With dead ends: 359 [2020-12-23 07:18:32,404 INFO L226 Difference]: Without dead ends: 357 [2020-12-23 07:18:32,404 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=152, Invalid=400, Unknown=0, NotChecked=0, Total=552 [2020-12-23 07:18:32,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2020-12-23 07:18:32,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 257. [2020-12-23 07:18:32,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 257 states. [2020-12-23 07:18:32,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 309 transitions. [2020-12-23 07:18:32,459 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 309 transitions. Word has length 33 [2020-12-23 07:18:32,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:18:32,459 INFO L481 AbstractCegarLoop]: Abstraction has 257 states and 309 transitions. [2020-12-23 07:18:32,459 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-23 07:18:32,460 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 309 transitions. [2020-12-23 07:18:32,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-12-23 07:18:32,460 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:18:32,460 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:18:32,666 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:18:32,667 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]=== [2020-12-23 07:18:32,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:18:32,668 INFO L82 PathProgramCache]: Analyzing trace with hash -741882838, now seen corresponding path program 1 times [2020-12-23 07:18:32,668 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:18:32,669 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849415371] [2020-12-23 07:18:32,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:18:32,679 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:18:32,680 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [785086216] [2020-12-23 07:18:32,680 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 [2020-12-23 07:18:32,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:18:32,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-23 07:18:32,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:18:32,800 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-23 07:18:32,801 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849415371] [2020-12-23 07:18:32,801 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:18:32,801 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [785086216] [2020-12-23 07:18:32,801 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 07:18:32,801 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-23 07:18:32,802 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394183897] [2020-12-23 07:18:32,802 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 07:18:32,802 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:18:32,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 07:18:32,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-23 07:18:32,803 INFO L87 Difference]: Start difference. First operand 257 states and 309 transitions. Second operand 5 states. [2020-12-23 07:18:32,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:18:32,888 INFO L93 Difference]: Finished difference Result 450 states and 548 transitions. [2020-12-23 07:18:32,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 07:18:32,889 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 34 [2020-12-23 07:18:32,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:18:32,891 INFO L225 Difference]: With dead ends: 450 [2020-12-23 07:18:32,891 INFO L226 Difference]: Without dead ends: 283 [2020-12-23 07:18:32,892 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-23 07:18:32,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2020-12-23 07:18:32,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 257. [2020-12-23 07:18:32,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 257 states. [2020-12-23 07:18:32,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 308 transitions. [2020-12-23 07:18:32,923 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 308 transitions. Word has length 34 [2020-12-23 07:18:32,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:18:32,923 INFO L481 AbstractCegarLoop]: Abstraction has 257 states and 308 transitions. [2020-12-23 07:18:32,923 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 07:18:32,923 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 308 transitions. [2020-12-23 07:18:32,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-12-23 07:18:32,924 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:18:32,924 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:18:33,124 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-12-23 07:18:33,125 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]=== [2020-12-23 07:18:33,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:18:33,126 INFO L82 PathProgramCache]: Analyzing trace with hash -835022368, now seen corresponding path program 2 times [2020-12-23 07:18:33,126 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:18:33,126 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592978531] [2020-12-23 07:18:33,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:18:33,136 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:18:33,137 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1999606756] [2020-12-23 07:18:33,137 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 [2020-12-23 07:18:33,183 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-12-23 07:18:33,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:18:33,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-23 07:18:33,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:18:33,255 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-23 07:18:33,255 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592978531] [2020-12-23 07:18:33,255 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:18:33,256 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999606756] [2020-12-23 07:18:33,256 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 07:18:33,256 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-23 07:18:33,256 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636231017] [2020-12-23 07:18:33,256 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 07:18:33,257 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:18:33,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 07:18:33,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-23 07:18:33,257 INFO L87 Difference]: Start difference. First operand 257 states and 308 transitions. Second operand 5 states. [2020-12-23 07:18:33,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:18:33,398 INFO L93 Difference]: Finished difference Result 297 states and 356 transitions. [2020-12-23 07:18:33,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 07:18:33,399 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 34 [2020-12-23 07:18:33,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:18:33,400 INFO L225 Difference]: With dead ends: 297 [2020-12-23 07:18:33,400 INFO L226 Difference]: Without dead ends: 295 [2020-12-23 07:18:33,401 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-23 07:18:33,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2020-12-23 07:18:33,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 284. [2020-12-23 07:18:33,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 284 states. [2020-12-23 07:18:33,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 341 transitions. [2020-12-23 07:18:33,437 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 341 transitions. Word has length 34 [2020-12-23 07:18:33,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:18:33,437 INFO L481 AbstractCegarLoop]: Abstraction has 284 states and 341 transitions. [2020-12-23 07:18:33,437 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 07:18:33,438 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 341 transitions. [2020-12-23 07:18:33,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-12-23 07:18:33,438 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:18:33,438 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:18:33,653 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-23 07:18:33,654 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]=== [2020-12-23 07:18:33,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:18:33,655 INFO L82 PathProgramCache]: Analyzing trace with hash -1985668623, now seen corresponding path program 1 times [2020-12-23 07:18:33,655 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:18:33,655 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298467244] [2020-12-23 07:18:33,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:18:33,665 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:18:33,665 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1003929674] [2020-12-23 07:18:33,665 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 [2020-12-23 07:18:33,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:18:33,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 32 conjunts are in the unsatisfiable core [2020-12-23 07:18:33,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:18:34,148 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:18:34,149 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298467244] [2020-12-23 07:18:34,149 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:18:34,149 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003929674] [2020-12-23 07:18:34,149 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:18:34,149 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-12-23 07:18:34,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049008886] [2020-12-23 07:18:34,150 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-23 07:18:34,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:18:34,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-23 07:18:34,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2020-12-23 07:18:34,151 INFO L87 Difference]: Start difference. First operand 284 states and 341 transitions. Second operand 15 states. [2020-12-23 07:18:36,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:18:36,955 INFO L93 Difference]: Finished difference Result 446 states and 515 transitions. [2020-12-23 07:18:36,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-12-23 07:18:36,955 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 35 [2020-12-23 07:18:36,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:18:36,962 INFO L225 Difference]: With dead ends: 446 [2020-12-23 07:18:36,962 INFO L226 Difference]: Without dead ends: 444 [2020-12-23 07:18:36,966 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 709 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=578, Invalid=2178, Unknown=0, NotChecked=0, Total=2756 [2020-12-23 07:18:36,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 444 states. [2020-12-23 07:18:37,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 444 to 378. [2020-12-23 07:18:37,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 378 states. [2020-12-23 07:18:37,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 466 transitions. [2020-12-23 07:18:37,045 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 466 transitions. Word has length 35 [2020-12-23 07:18:37,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:18:37,046 INFO L481 AbstractCegarLoop]: Abstraction has 378 states and 466 transitions. [2020-12-23 07:18:37,046 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-23 07:18:37,046 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 466 transitions. [2020-12-23 07:18:37,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-12-23 07:18:37,047 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:18:37,048 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] [2020-12-23 07:18:37,263 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-23 07:18:37,264 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]=== [2020-12-23 07:18:37,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:18:37,265 INFO L82 PathProgramCache]: Analyzing trace with hash -1261910412, now seen corresponding path program 1 times [2020-12-23 07:18:37,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:18:37,265 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747440332] [2020-12-23 07:18:37,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:18:37,287 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:18:37,287 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [695112261] [2020-12-23 07:18:37,287 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 [2020-12-23 07:18:37,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:18:37,364 WARN L261 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 83 conjunts are in the unsatisfiable core [2020-12-23 07:18:37,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:18:38,132 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:18:38,133 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747440332] [2020-12-23 07:18:38,133 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:18:38,133 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [695112261] [2020-12-23 07:18:38,133 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:18:38,134 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-12-23 07:18:38,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98216224] [2020-12-23 07:18:38,137 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-23 07:18:38,138 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:18:38,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-23 07:18:38,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2020-12-23 07:18:38,139 INFO L87 Difference]: Start difference. First operand 378 states and 466 transitions. Second operand 18 states. [2020-12-23 07:18:39,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:18:39,535 INFO L93 Difference]: Finished difference Result 457 states and 549 transitions. [2020-12-23 07:18:39,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-23 07:18:39,536 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 37 [2020-12-23 07:18:39,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:18:39,539 INFO L225 Difference]: With dead ends: 457 [2020-12-23 07:18:39,539 INFO L226 Difference]: Without dead ends: 455 [2020-12-23 07:18:39,540 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=136, Invalid=676, Unknown=0, NotChecked=0, Total=812 [2020-12-23 07:18:39,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 455 states. [2020-12-23 07:18:39,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 455 to 425. [2020-12-23 07:18:39,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 425 states. [2020-12-23 07:18:39,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 425 states to 425 states and 522 transitions. [2020-12-23 07:18:39,614 INFO L78 Accepts]: Start accepts. Automaton has 425 states and 522 transitions. Word has length 37 [2020-12-23 07:18:39,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:18:39,615 INFO L481 AbstractCegarLoop]: Abstraction has 425 states and 522 transitions. [2020-12-23 07:18:39,615 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-23 07:18:39,615 INFO L276 IsEmpty]: Start isEmpty. Operand 425 states and 522 transitions. [2020-12-23 07:18:39,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-12-23 07:18:39,616 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:18:39,616 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-23 07:18:39,832 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:18:39,833 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]=== [2020-12-23 07:18:39,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:18:39,833 INFO L82 PathProgramCache]: Analyzing trace with hash 1353666624, now seen corresponding path program 1 times [2020-12-23 07:18:39,834 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:18:39,834 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219724112] [2020-12-23 07:18:39,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:18:39,842 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:18:39,843 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1268399253] [2020-12-23 07:18:39,843 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 [2020-12-23 07:18:39,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:18:39,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 73 conjunts are in the unsatisfiable core [2020-12-23 07:18:39,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:18:40,479 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:18:40,479 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219724112] [2020-12-23 07:18:40,480 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:18:40,480 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1268399253] [2020-12-23 07:18:40,480 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:18:40,480 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-12-23 07:18:40,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991729615] [2020-12-23 07:18:40,481 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-23 07:18:40,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:18:40,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-23 07:18:40,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2020-12-23 07:18:40,482 INFO L87 Difference]: Start difference. First operand 425 states and 522 transitions. Second operand 14 states. [2020-12-23 07:18:41,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:18:41,742 INFO L93 Difference]: Finished difference Result 531 states and 641 transitions. [2020-12-23 07:18:41,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-23 07:18:41,743 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 37 [2020-12-23 07:18:41,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:18:41,747 INFO L225 Difference]: With dead ends: 531 [2020-12-23 07:18:41,747 INFO L226 Difference]: Without dead ends: 523 [2020-12-23 07:18:41,748 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=139, Invalid=563, Unknown=0, NotChecked=0, Total=702 [2020-12-23 07:18:41,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 523 states. [2020-12-23 07:18:41,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 523 to 446. [2020-12-23 07:18:41,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 446 states. [2020-12-23 07:18:41,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 446 states to 446 states and 546 transitions. [2020-12-23 07:18:41,827 INFO L78 Accepts]: Start accepts. Automaton has 446 states and 546 transitions. Word has length 37 [2020-12-23 07:18:41,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:18:41,828 INFO L481 AbstractCegarLoop]: Abstraction has 446 states and 546 transitions. [2020-12-23 07:18:41,828 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-23 07:18:41,828 INFO L276 IsEmpty]: Start isEmpty. Operand 446 states and 546 transitions. [2020-12-23 07:18:41,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-12-23 07:18:41,829 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:18:41,829 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:18:42,042 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:18:42,043 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]=== [2020-12-23 07:18:42,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:18:42,044 INFO L82 PathProgramCache]: Analyzing trace with hash 1479833839, now seen corresponding path program 2 times [2020-12-23 07:18:42,044 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:18:42,044 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411039550] [2020-12-23 07:18:42,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:18:42,056 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:18:42,056 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1327002571] [2020-12-23 07:18:42,056 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 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 [2020-12-23 07:18:42,117 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 07:18:42,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:18:42,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 34 conjunts are in the unsatisfiable core [2020-12-23 07:18:42,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:18:42,358 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:18:42,359 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411039550] [2020-12-23 07:18:42,359 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:18:42,359 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1327002571] [2020-12-23 07:18:42,359 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:18:42,360 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-12-23 07:18:42,360 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315473503] [2020-12-23 07:18:42,360 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-23 07:18:42,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:18:42,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-23 07:18:42,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-12-23 07:18:42,361 INFO L87 Difference]: Start difference. First operand 446 states and 546 transitions. Second operand 12 states. [2020-12-23 07:18:43,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:18:43,375 INFO L93 Difference]: Finished difference Result 499 states and 603 transitions. [2020-12-23 07:18:43,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-23 07:18:43,376 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 37 [2020-12-23 07:18:43,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:18:43,379 INFO L225 Difference]: With dead ends: 499 [2020-12-23 07:18:43,379 INFO L226 Difference]: Without dead ends: 497 [2020-12-23 07:18:43,380 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=157, Invalid=443, Unknown=0, NotChecked=0, Total=600 [2020-12-23 07:18:43,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 497 states. [2020-12-23 07:18:43,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 497 to 464. [2020-12-23 07:18:43,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 464 states. [2020-12-23 07:18:43,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 464 states to 464 states and 567 transitions. [2020-12-23 07:18:43,457 INFO L78 Accepts]: Start accepts. Automaton has 464 states and 567 transitions. Word has length 37 [2020-12-23 07:18:43,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:18:43,457 INFO L481 AbstractCegarLoop]: Abstraction has 464 states and 567 transitions. [2020-12-23 07:18:43,457 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-23 07:18:43,458 INFO L276 IsEmpty]: Start isEmpty. Operand 464 states and 567 transitions. [2020-12-23 07:18:43,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-12-23 07:18:43,458 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:18:43,459 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 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] [2020-12-23 07:18:43,672 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-12-23 07:18:43,673 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]=== [2020-12-23 07:18:43,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:18:43,674 INFO L82 PathProgramCache]: Analyzing trace with hash 62559017, now seen corresponding path program 2 times [2020-12-23 07:18:43,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:18:43,674 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451592336] [2020-12-23 07:18:43,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:18:43,684 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:18:43,684 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [811194251] [2020-12-23 07:18:43,684 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 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 [2020-12-23 07:18:43,757 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 07:18:43,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:18:43,760 WARN L261 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 88 conjunts are in the unsatisfiable core [2020-12-23 07:18:43,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:18:44,788 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:18:44,789 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451592336] [2020-12-23 07:18:44,789 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:18:44,789 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [811194251] [2020-12-23 07:18:44,789 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:18:44,789 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-12-23 07:18:44,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824089729] [2020-12-23 07:18:44,790 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-23 07:18:44,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:18:44,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-23 07:18:44,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2020-12-23 07:18:44,791 INFO L87 Difference]: Start difference. First operand 464 states and 567 transitions. Second operand 19 states. [2020-12-23 07:18:46,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:18:46,888 INFO L93 Difference]: Finished difference Result 600 states and 718 transitions. [2020-12-23 07:18:46,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-23 07:18:46,891 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 42 [2020-12-23 07:18:46,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:18:46,894 INFO L225 Difference]: With dead ends: 600 [2020-12-23 07:18:46,894 INFO L226 Difference]: Without dead ends: 590 [2020-12-23 07:18:46,895 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 304 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=204, Invalid=1202, Unknown=0, NotChecked=0, Total=1406 [2020-12-23 07:18:46,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 590 states. [2020-12-23 07:18:46,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 590 to 485. [2020-12-23 07:18:46,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 485 states. [2020-12-23 07:18:46,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 485 states to 485 states and 591 transitions. [2020-12-23 07:18:46,978 INFO L78 Accepts]: Start accepts. Automaton has 485 states and 591 transitions. Word has length 42 [2020-12-23 07:18:46,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:18:46,978 INFO L481 AbstractCegarLoop]: Abstraction has 485 states and 591 transitions. [2020-12-23 07:18:46,978 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-23 07:18:46,978 INFO L276 IsEmpty]: Start isEmpty. Operand 485 states and 591 transitions. [2020-12-23 07:18:46,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-12-23 07:18:46,979 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:18:46,979 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:18:47,193 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-12-23 07:18:47,194 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]=== [2020-12-23 07:18:47,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:18:47,195 INFO L82 PathProgramCache]: Analyzing trace with hash 188726232, now seen corresponding path program 2 times [2020-12-23 07:18:47,195 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:18:47,195 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957142858] [2020-12-23 07:18:47,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:18:47,204 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:18:47,205 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [323965988] [2020-12-23 07:18:47,205 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 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 [2020-12-23 07:18:47,276 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 07:18:47,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:18:47,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 41 conjunts are in the unsatisfiable core [2020-12-23 07:18:47,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:18:47,777 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:18:47,778 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957142858] [2020-12-23 07:18:47,778 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:18:47,778 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [323965988] [2020-12-23 07:18:47,778 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:18:47,778 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-12-23 07:18:47,778 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650184313] [2020-12-23 07:18:47,779 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 07:18:47,779 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:18:47,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 07:18:47,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-12-23 07:18:47,780 INFO L87 Difference]: Start difference. First operand 485 states and 591 transitions. Second operand 17 states. [2020-12-23 07:18:49,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:18:49,507 INFO L93 Difference]: Finished difference Result 639 states and 761 transitions. [2020-12-23 07:18:49,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-12-23 07:18:49,508 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 42 [2020-12-23 07:18:49,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:18:49,512 INFO L225 Difference]: With dead ends: 639 [2020-12-23 07:18:49,513 INFO L226 Difference]: Without dead ends: 637 [2020-12-23 07:18:49,514 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 327 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=313, Invalid=1169, Unknown=0, NotChecked=0, Total=1482 [2020-12-23 07:18:49,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 637 states. [2020-12-23 07:18:49,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 637 to 503. [2020-12-23 07:18:49,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 503 states. [2020-12-23 07:18:49,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 503 states to 503 states and 612 transitions. [2020-12-23 07:18:49,629 INFO L78 Accepts]: Start accepts. Automaton has 503 states and 612 transitions. Word has length 42 [2020-12-23 07:18:49,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:18:49,630 INFO L481 AbstractCegarLoop]: Abstraction has 503 states and 612 transitions. [2020-12-23 07:18:49,630 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 07:18:49,630 INFO L276 IsEmpty]: Start isEmpty. Operand 503 states and 612 transitions. [2020-12-23 07:18:49,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-12-23 07:18:49,631 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:18:49,631 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:18:49,845 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:18:49,846 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]=== [2020-12-23 07:18:49,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:18:49,846 INFO L82 PathProgramCache]: Analyzing trace with hash 1389632472, now seen corresponding path program 1 times [2020-12-23 07:18:49,847 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:18:49,847 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423401710] [2020-12-23 07:18:49,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:18:49,859 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:18:49,860 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2013851831] [2020-12-23 07:18:49,860 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 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 [2020-12-23 07:18:49,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:18:49,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 30 conjunts are in the unsatisfiable core [2020-12-23 07:18:49,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:18:50,148 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 6 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:18:50,148 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423401710] [2020-12-23 07:18:50,148 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:18:50,148 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013851831] [2020-12-23 07:18:50,148 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:18:50,149 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-12-23 07:18:50,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028258317] [2020-12-23 07:18:50,149 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-23 07:18:50,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:18:50,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-23 07:18:50,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2020-12-23 07:18:50,150 INFO L87 Difference]: Start difference. First operand 503 states and 612 transitions. Second operand 12 states. [2020-12-23 07:18:51,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:18:51,117 INFO L93 Difference]: Finished difference Result 719 states and 872 transitions. [2020-12-23 07:18:51,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-23 07:18:51,118 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 45 [2020-12-23 07:18:51,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:18:51,122 INFO L225 Difference]: With dead ends: 719 [2020-12-23 07:18:51,123 INFO L226 Difference]: Without dead ends: 717 [2020-12-23 07:18:51,124 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=287, Invalid=769, Unknown=0, NotChecked=0, Total=1056 [2020-12-23 07:18:51,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 717 states. [2020-12-23 07:18:51,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 717 to 599. [2020-12-23 07:18:51,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 599 states. [2020-12-23 07:18:51,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 599 states to 599 states and 726 transitions. [2020-12-23 07:18:51,247 INFO L78 Accepts]: Start accepts. Automaton has 599 states and 726 transitions. Word has length 45 [2020-12-23 07:18:51,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:18:51,248 INFO L481 AbstractCegarLoop]: Abstraction has 599 states and 726 transitions. [2020-12-23 07:18:51,248 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-23 07:18:51,248 INFO L276 IsEmpty]: Start isEmpty. Operand 599 states and 726 transitions. [2020-12-23 07:18:51,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-12-23 07:18:51,249 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:18:51,249 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:18:51,462 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-12-23 07:18:51,463 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]=== [2020-12-23 07:18:51,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:18:51,464 INFO L82 PathProgramCache]: Analyzing trace with hash -1220921059, now seen corresponding path program 3 times [2020-12-23 07:18:51,464 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:18:51,464 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789332562] [2020-12-23 07:18:51,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:18:51,472 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:18:51,472 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1940227532] [2020-12-23 07:18:51,472 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 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 [2020-12-23 07:18:51,530 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-23 07:18:51,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:18:51,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 61 conjunts are in the unsatisfiable core [2020-12-23 07:18:51,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:18:51,942 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-12-23 07:18:51,942 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789332562] [2020-12-23 07:18:51,942 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:18:51,943 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1940227532] [2020-12-23 07:18:51,943 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:18:51,943 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-12-23 07:18:51,943 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769109290] [2020-12-23 07:18:51,943 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-23 07:18:51,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:18:51,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-23 07:18:51,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-12-23 07:18:51,944 INFO L87 Difference]: Start difference. First operand 599 states and 726 transitions. Second operand 13 states. [2020-12-23 07:18:56,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:18:56,843 INFO L93 Difference]: Finished difference Result 748 states and 894 transitions. [2020-12-23 07:18:56,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-23 07:18:56,844 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 46 [2020-12-23 07:18:56,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:18:56,848 INFO L225 Difference]: With dead ends: 748 [2020-12-23 07:18:56,848 INFO L226 Difference]: Without dead ends: 740 [2020-12-23 07:18:56,849 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=101, Invalid=319, Unknown=0, NotChecked=0, Total=420 [2020-12-23 07:18:56,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 740 states. [2020-12-23 07:18:56,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 740 to 616. [2020-12-23 07:18:56,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 616 states. [2020-12-23 07:18:56,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 616 states to 616 states and 745 transitions. [2020-12-23 07:18:56,960 INFO L78 Accepts]: Start accepts. Automaton has 616 states and 745 transitions. Word has length 46 [2020-12-23 07:18:56,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:18:56,961 INFO L481 AbstractCegarLoop]: Abstraction has 616 states and 745 transitions. [2020-12-23 07:18:56,961 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-23 07:18:56,961 INFO L276 IsEmpty]: Start isEmpty. Operand 616 states and 745 transitions. [2020-12-23 07:18:56,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-12-23 07:18:56,962 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:18:56,962 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:18:57,177 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:18:57,178 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]=== [2020-12-23 07:18:57,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:18:57,179 INFO L82 PathProgramCache]: Analyzing trace with hash -1094753844, now seen corresponding path program 3 times [2020-12-23 07:18:57,179 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:18:57,179 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356343940] [2020-12-23 07:18:57,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:18:57,188 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:18:57,189 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [338747234] [2020-12-23 07:18:57,189 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 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 [2020-12-23 07:18:57,249 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-23 07:18:57,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:18:57,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 24 conjunts are in the unsatisfiable core [2020-12-23 07:18:57,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:19:00,008 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 28 proven. 2 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-12-23 07:19:00,009 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356343940] [2020-12-23 07:19:00,009 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:19:00,009 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [338747234] [2020-12-23 07:19:00,009 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:19:00,010 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-12-23 07:19:00,010 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165783026] [2020-12-23 07:19:00,010 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-23 07:19:00,010 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:19:00,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-23 07:19:00,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=28, Unknown=1, NotChecked=0, Total=42 [2020-12-23 07:19:00,011 INFO L87 Difference]: Start difference. First operand 616 states and 745 transitions. Second operand 7 states. [2020-12-23 07:19:50,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:19:50,046 INFO L93 Difference]: Finished difference Result 622 states and 748 transitions. [2020-12-23 07:19:50,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-23 07:19:50,056 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 46 [2020-12-23 07:19:50,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:19:50,059 INFO L225 Difference]: With dead ends: 622 [2020-12-23 07:19:50,060 INFO L226 Difference]: Without dead ends: 620 [2020-12-23 07:19:50,060 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 15.7s TimeCoverageRelationStatistics Valid=34, Invalid=69, Unknown=7, NotChecked=0, Total=110 [2020-12-23 07:19:50,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 620 states. [2020-12-23 07:19:50,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 620 to 403. [2020-12-23 07:19:50,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 403 states. [2020-12-23 07:19:50,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 483 transitions. [2020-12-23 07:19:50,163 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 483 transitions. Word has length 46 [2020-12-23 07:19:50,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:19:50,163 INFO L481 AbstractCegarLoop]: Abstraction has 403 states and 483 transitions. [2020-12-23 07:19:50,163 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-23 07:19:50,164 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 483 transitions. [2020-12-23 07:19:50,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-12-23 07:19:50,164 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:19:50,164 INFO L422 BasicCegarLoop]: trace histogram [5, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:19:50,377 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-12-23 07:19:50,378 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]=== [2020-12-23 07:19:50,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:19:50,378 INFO L82 PathProgramCache]: Analyzing trace with hash -1298920666, now seen corresponding path program 2 times [2020-12-23 07:19:50,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:19:50,378 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834940056] [2020-12-23 07:19:50,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:19:50,393 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:19:50,394 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1073872620] [2020-12-23 07:19:50,394 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 [2020-12-23 07:19:50,464 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 07:19:50,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:19:50,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 34 conjunts are in the unsatisfiable core [2020-12-23 07:19:50,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:19:51,194 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834940056] [2020-12-23 07:19:51,195 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:19:51,195 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1073872620] [2020-12-23 07:19:51,195 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: null [2020-12-23 07:19:51,195 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2020-12-23 07:19:51,195 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2020-12-23 07:19:51,195 ERROR L205 FreeRefinementEngine]: Strategy CAMEL failed to provide any proof altough trace is infeasible [2020-12-23 07:19:51,195 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-23 07:19:51,401 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-12-23 07:19:51,427 WARN L227 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2020-12-23 07:19:51,427 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.12 07:19:51 BoogieIcfgContainer [2020-12-23 07:19:51,428 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-23 07:19:51,428 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-23 07:19:51,428 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-23 07:19:51,428 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-23 07:19:51,429 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 07:18:21" (3/4) ... [2020-12-23 07:19:51,433 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-12-23 07:19:51,433 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-23 07:19:51,435 INFO L168 Benchmark]: Toolchain (without parser) took 91183.98 ms. Allocated memory was 166.7 MB in the beginning and 348.1 MB in the end (delta: 181.4 MB). Free memory was 142.6 MB in the beginning and 221.5 MB in the end (delta: -78.9 MB). Peak memory consumption was 104.1 MB. Max. memory is 8.0 GB. [2020-12-23 07:19:51,435 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 166.7 MB. Free memory is still 139.2 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-12-23 07:19:51,436 INFO L168 Benchmark]: CACSL2BoogieTranslator took 346.33 ms. Allocated memory is still 166.7 MB. Free memory was 142.4 MB in the beginning and 132.2 MB in the end (delta: 10.2 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-12-23 07:19:51,436 INFO L168 Benchmark]: Boogie Procedure Inliner took 42.93 ms. Allocated memory is still 166.7 MB. Free memory was 132.1 MB in the beginning and 130.5 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-12-23 07:19:51,436 INFO L168 Benchmark]: Boogie Preprocessor took 28.67 ms. Allocated memory is still 166.7 MB. Free memory was 130.5 MB in the beginning and 129.3 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-23 07:19:51,437 INFO L168 Benchmark]: RCFGBuilder took 427.55 ms. Allocated memory is still 166.7 MB. Free memory was 129.3 MB in the beginning and 148.9 MB in the end (delta: -19.6 MB). Peak memory consumption was 20.3 MB. Max. memory is 8.0 GB. [2020-12-23 07:19:51,437 INFO L168 Benchmark]: TraceAbstraction took 90323.64 ms. Allocated memory was 166.7 MB in the beginning and 348.1 MB in the end (delta: 181.4 MB). Free memory was 148.5 MB in the beginning and 222.1 MB in the end (delta: -73.6 MB). Peak memory consumption was 107.8 MB. Max. memory is 8.0 GB. [2020-12-23 07:19:51,438 INFO L168 Benchmark]: Witness Printer took 4.99 ms. Allocated memory is still 348.1 MB. Free memory was 222.1 MB in the beginning and 221.5 MB in the end (delta: 526.3 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-23 07:19:51,440 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 166.7 MB. Free memory is still 139.2 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 346.33 ms. Allocated memory is still 166.7 MB. Free memory was 142.4 MB in the beginning and 132.2 MB in the end (delta: 10.2 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 42.93 ms. Allocated memory is still 166.7 MB. Free memory was 132.1 MB in the beginning and 130.5 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 28.67 ms. Allocated memory is still 166.7 MB. Free memory was 130.5 MB in the beginning and 129.3 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 427.55 ms. Allocated memory is still 166.7 MB. Free memory was 129.3 MB in the beginning and 148.9 MB in the end (delta: -19.6 MB). Peak memory consumption was 20.3 MB. Max. memory is 8.0 GB. * TraceAbstraction took 90323.64 ms. Allocated memory was 166.7 MB in the beginning and 348.1 MB in the end (delta: 181.4 MB). Free memory was 148.5 MB in the beginning and 222.1 MB in the end (delta: -73.6 MB). Peak memory consumption was 107.8 MB. Max. memory is 8.0 GB. * Witness Printer took 4.99 ms. Allocated memory is still 348.1 MB. Free memory was 222.1 MB in the beginning and 221.5 MB in the end (delta: 526.3 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 13]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L19] int x, y; [L20] long long a, b, p, q, r, s; [L21] x = __VERIFIER_nondet_int() [L22] y = __VERIFIER_nondet_int() [L8] COND FALSE !(!cond) [L8] COND FALSE !(!cond) [L26] a = x [L27] b = y [L28] p = 1 [L29] q = 0 [L30] r = 0 [L31] s = 1 [L33] COND TRUE 1 [L34] COND FALSE !(!(b != 0)) [L36] long long c, k; [L37] c = a [L38] k = 0 [L40] COND TRUE 1 [L41] COND FALSE !(!(c >= b)) [L43] long long d, v; [L44] d = 1 [L45] v = b [L47] COND TRUE 1 [L11] COND FALSE !(!(cond)) [L11] COND FALSE !(!(cond)) [L11] COND FALSE !(!(cond)) [L11] COND FALSE !(!(cond)) [L53] COND TRUE !(c >= 2 * v) [L58] c = c - v [L59] k = k + d [L40] COND TRUE 1 [L41] COND TRUE !(c >= b) [L62] a = b [L63] b = c [L64] long long temp; [L65] temp = p [L66] p = q [L67] q = temp - q * k [L68] temp = r [L69] r = s [L70] s = temp - s * k [L33] COND TRUE 1 [L34] COND FALSE !(!(b != 0)) [L36] long long c, k; [L37] c = a [L38] k = 0 [L40] COND TRUE 1 [L41] COND FALSE !(!(c >= b)) [L43] long long d, v; [L44] d = 1 [L45] v = b [L47] COND TRUE 1 [L11] COND FALSE !(!(cond)) [L11] COND FALSE !(!(cond)) [L11] COND FALSE !(!(cond)) [L11] COND FALSE !(!(cond)) [L53] COND TRUE !(c >= 2 * v) [L58] c = c - v [L59] k = k + d [L40] COND TRUE 1 [L41] COND TRUE !(c >= b) [L62] a = b [L63] b = c [L64] long long temp; [L65] temp = p [L66] p = q [L67] q = temp - q * k [L68] temp = r [L69] r = s [L70] s = temp - s * k [L33] COND TRUE 1 [L34] COND FALSE !(!(b != 0)) [L36] long long c, k; [L37] c = a [L38] k = 0 [L40] COND TRUE 1 [L41] COND FALSE !(!(c >= b)) [L43] long long d, v; [L44] d = 1 [L45] v = b [L47] COND TRUE 1 [L11] COND TRUE !(cond) [L13] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 37 locations, 5 error locations. Started 1 CEGAR loops. VerificationResult: UNKNOWN, OverallTime: 90.2s, OverallIterations: 27, TraceHistogramMax: 5, AutomataDifference: 71.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 913 SDtfs, 3802 SDslu, 3925 SDs, 0 SdLazy, 5853 SolverSat, 658 SolverUnsat, 20 SolverUnknown, 0 SolverNotchecked, 45.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 961 GetRequests, 527 SyntacticMatches, 3 SemanticMatches, 431 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2274 ImplicationChecksByTransitivity, 28.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=616occurred in iteration=25, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 1.3s AutomataMinimizationTime, 26 MinimizatonAttempts, 1604 StatesRemovedByMinimization, 25 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 9.0s InterpolantComputationTime, 741 NumberOfCodeBlocks, 688 NumberOfCodeBlocksAsserted, 34 NumberOfCheckSat, 715 ConstructedInterpolants, 0 QuantifiedInterpolants, 297152 SizeOfPredicates, 298 NumberOfNonLiveVariables, 3088 ConjunctsInSsa, 793 ConjunctsInUnsatCore, 26 InterpolantComputations, 9 PerfectInterpolantSequences, 125/340 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 could not prove your program: unable to determine feasibility of some traces Received shutdown request...