/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/nla-digbench-scaling/geo2-ll_unwindbound100.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 07:46:20,071 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 07:46:20,075 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 07:46:20,134 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-23 07:46:20,134 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-23 07:46:20,139 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-23 07:46:20,143 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-23 07:46:20,149 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-23 07:46:20,153 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-23 07:46:20,160 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-23 07:46:20,165 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-23 07:46:20,166 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-23 07:46:20,167 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 07:46:20,170 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 07:46:20,172 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 07:46:20,174 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 07:46:20,176 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 07:46:20,179 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 07:46:20,187 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 07:46:20,196 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 07:46:20,198 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 07:46:20,200 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 07:46:20,202 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 07:46:20,205 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 07:46:20,232 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-23 07:46:20,232 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-23 07:46:20,232 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-23 07:46:20,234 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-23 07:46:20,235 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-23 07:46:20,236 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-23 07:46:20,237 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-23 07:46:20,238 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-23 07:46:20,240 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-23 07:46:20,241 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-23 07:46:20,242 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-23 07:46:20,242 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-23 07:46:20,243 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-23 07:46:20,251 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-23 07:46:20,251 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 07:46:20,253 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 07:46:20,254 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 07:46:20,255 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 07:46:20,300 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 07:46:20,300 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 07:46:20,305 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 07:46:20,305 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 07:46:20,305 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 07:46:20,306 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 07:46:20,306 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 07:46:20,306 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 07:46:20,306 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-23 07:46:20,306 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 07:46:20,308 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-23 07:46:20,308 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-23 07:46:20,308 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 07:46:20,308 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-23 07:46:20,309 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 07:46:20,309 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 07:46:20,309 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 07:46:20,309 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 07:46:20,310 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 07:46:20,310 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 07:46:20,310 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-23 07:46:20,310 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 07:46:20,310 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 07:46:20,311 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-23 07:46:20,311 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 07:46:20,311 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 07:46:20,692 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 07:46:20,724 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 07:46:20,727 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 07:46:20,728 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 07:46:20,729 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 07:46:20,730 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/geo2-ll_unwindbound100.c [2020-12-23 07:46:20,813 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/f2667b3e7/3190d55ab8ac4670b6e4faaa3701a13f/FLAG74c51f430 [2020-12-23 07:46:21,541 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 07:46:21,541 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/geo2-ll_unwindbound100.c [2020-12-23 07:46:21,551 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/f2667b3e7/3190d55ab8ac4670b6e4faaa3701a13f/FLAG74c51f430 [2020-12-23 07:46:21,906 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/f2667b3e7/3190d55ab8ac4670b6e4faaa3701a13f [2020-12-23 07:46:21,910 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 07:46:21,912 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 07:46:21,916 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 07:46:21,916 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 07:46:21,920 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 07:46:21,921 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 07:46:21" (1/1) ... [2020-12-23 07:46:21,924 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4d127448 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:46:21, skipping insertion in model container [2020-12-23 07:46:21,924 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 07:46:21" (1/1) ... [2020-12-23 07:46:21,933 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 07:46:21,953 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-23 07:46:22,156 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/geo2-ll_unwindbound100.c[525,538] left hand side expression in assignment: lhs: VariableLHS[~z~0,] left hand side expression in assignment: lhs: VariableLHS[~k~0,] 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[~c~0,] left hand side expression in assignment: lhs: VariableLHS[~c~0,] left hand side expression in assignment: lhs: VariableLHS[~x~0,] left hand side expression in assignment: lhs: VariableLHS[~y~0,] [2020-12-23 07:46:22,175 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 07:46:22,186 INFO L203 MainTranslator]: Completed pre-run [2020-12-23 07:46:22,202 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/geo2-ll_unwindbound100.c[525,538] left hand side expression in assignment: lhs: VariableLHS[~z~0,] left hand side expression in assignment: lhs: VariableLHS[~k~0,] 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[~c~0,] left hand side expression in assignment: lhs: VariableLHS[~c~0,] left hand side expression in assignment: lhs: VariableLHS[~x~0,] left hand side expression in assignment: lhs: VariableLHS[~y~0,] [2020-12-23 07:46:22,208 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 07:46:22,226 INFO L208 MainTranslator]: Completed translation [2020-12-23 07:46:22,226 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:46:22 WrapperNode [2020-12-23 07:46:22,227 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 07:46:22,228 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 07:46:22,228 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 07:46:22,229 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 07:46:22,238 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:46:22" (1/1) ... [2020-12-23 07:46:22,247 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:46:22" (1/1) ... [2020-12-23 07:46:22,268 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 07:46:22,269 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 07:46:22,269 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 07:46:22,270 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 07:46:22,280 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:46:22" (1/1) ... [2020-12-23 07:46:22,281 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:46:22" (1/1) ... [2020-12-23 07:46:22,282 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:46:22" (1/1) ... [2020-12-23 07:46:22,283 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:46:22" (1/1) ... [2020-12-23 07:46:22,287 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:46:22" (1/1) ... [2020-12-23 07:46:22,291 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:46:22" (1/1) ... [2020-12-23 07:46:22,292 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:46:22" (1/1) ... [2020-12-23 07:46:22,295 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 07:46:22,296 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 07:46:22,296 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 07:46:22,296 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 07:46:22,297 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:46:22" (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 07:46:22,416 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-23 07:46:22,417 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 07:46:22,417 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 07:46:22,418 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 07:46:22,821 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 07:46:22,821 INFO L299 CfgBuilder]: Removed 9 assume(true) statements. [2020-12-23 07:46:22,823 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 07:46:22 BoogieIcfgContainer [2020-12-23 07:46:22,824 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 07:46:22,826 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 07:46:22,826 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 07:46:22,829 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 07:46:22,830 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 07:46:21" (1/3) ... [2020-12-23 07:46:22,831 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4241f3a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 07:46:22, skipping insertion in model container [2020-12-23 07:46:22,831 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:46:22" (2/3) ... [2020-12-23 07:46:22,831 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4241f3a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 07:46:22, skipping insertion in model container [2020-12-23 07:46:22,832 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 07:46:22" (3/3) ... [2020-12-23 07:46:22,833 INFO L111 eAbstractionObserver]: Analyzing ICFG geo2-ll_unwindbound100.c [2020-12-23 07:46:22,841 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 07:46:22,847 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-23 07:46:22,918 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-23 07:46:22,986 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 07:46:22,987 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-23 07:46:22,987 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 07:46:22,987 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 07:46:22,987 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 07:46:22,987 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 07:46:22,988 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 07:46:22,988 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 07:46:23,012 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states. [2020-12-23 07:46:23,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-23 07:46:23,019 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:46:23,020 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-23 07:46:23,020 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:46:23,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:46:23,028 INFO L82 PathProgramCache]: Analyzing trace with hash 889571274, now seen corresponding path program 1 times [2020-12-23 07:46:23,038 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:46:23,039 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477955383] [2020-12-23 07:46:23,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:46:23,183 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:46:23,185 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1245824508] [2020-12-23 07:46:23,185 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 07:46:23,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:46:23,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-23 07:46:23,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:46:23,364 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 07:46:23,365 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477955383] [2020-12-23 07:46:23,366 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:46:23,366 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1245824508] [2020-12-23 07:46:23,367 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 07:46:23,367 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-23 07:46:23,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795428798] [2020-12-23 07:46:23,373 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 07:46:23,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:46:23,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 07:46:23,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-23 07:46:23,392 INFO L87 Difference]: Start difference. First operand 16 states. Second operand 4 states. [2020-12-23 07:46:23,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:46:23,491 INFO L93 Difference]: Finished difference Result 44 states and 58 transitions. [2020-12-23 07:46:23,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 07:46:23,495 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-12-23 07:46:23,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:46:23,504 INFO L225 Difference]: With dead ends: 44 [2020-12-23 07:46:23,504 INFO L226 Difference]: Without dead ends: 19 [2020-12-23 07:46:23,508 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-23 07:46:23,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-12-23 07:46:23,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 16. [2020-12-23 07:46:23,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-12-23 07:46:23,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2020-12-23 07:46:23,544 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 6 [2020-12-23 07:46:23,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:46:23,545 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2020-12-23 07:46:23,545 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 07:46:23,545 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2020-12-23 07:46:23,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-23 07:46:23,546 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:46:23,546 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2020-12-23 07:46:23,762 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2020-12-23 07:46:23,763 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:46:23,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:46:23,765 INFO L82 PathProgramCache]: Analyzing trace with hash 855725686, now seen corresponding path program 1 times [2020-12-23 07:46:23,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:46:23,766 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974778864] [2020-12-23 07:46:23,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:46:23,789 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:46:23,790 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [645908485] [2020-12-23 07:46:23,790 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 07:46:23,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:46:23,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-23 07:46:23,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:46:23,989 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:46:23,990 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974778864] [2020-12-23 07:46:23,990 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:46:23,990 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [645908485] [2020-12-23 07:46:23,990 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:46:23,991 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-12-23 07:46:23,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300903484] [2020-12-23 07:46:23,992 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 07:46:23,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:46:23,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 07:46:23,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-23 07:46:23,994 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand 6 states. [2020-12-23 07:46:24,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:46:24,111 INFO L93 Difference]: Finished difference Result 29 states and 32 transitions. [2020-12-23 07:46:24,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 07:46:24,112 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-12-23 07:46:24,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:46:24,113 INFO L225 Difference]: With dead ends: 29 [2020-12-23 07:46:24,113 INFO L226 Difference]: Without dead ends: 23 [2020-12-23 07:46:24,114 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-23 07:46:24,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-12-23 07:46:24,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 20. [2020-12-23 07:46:24,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-12-23 07:46:24,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2020-12-23 07:46:24,120 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 10 [2020-12-23 07:46:24,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:46:24,121 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2020-12-23 07:46:24,121 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 07:46:24,121 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2020-12-23 07:46:24,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 07:46:24,122 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:46:24,122 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1] [2020-12-23 07:46:24,335 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:46:24,336 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:46:24,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:46:24,338 INFO L82 PathProgramCache]: Analyzing trace with hash -1778536670, now seen corresponding path program 2 times [2020-12-23 07:46:24,338 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:46:24,339 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310905357] [2020-12-23 07:46:24,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:46:24,362 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:46:24,365 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [268876717] [2020-12-23 07:46:24,365 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 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 07:46:24,457 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 07:46:24,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:46:24,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 30 conjunts are in the unsatisfiable core [2020-12-23 07:46:24,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:46:24,777 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:46:24,778 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310905357] [2020-12-23 07:46:24,778 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:46:24,778 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [268876717] [2020-12-23 07:46:24,778 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:46:24,779 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-12-23 07:46:24,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733361972] [2020-12-23 07:46:24,780 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-23 07:46:24,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:46:24,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-23 07:46:24,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-12-23 07:46:24,781 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 8 states. [2020-12-23 07:46:40,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:46:40,077 INFO L93 Difference]: Finished difference Result 33 states and 36 transitions. [2020-12-23 07:46:40,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-23 07:46:40,078 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 14 [2020-12-23 07:46:40,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:46:40,080 INFO L225 Difference]: With dead ends: 33 [2020-12-23 07:46:40,080 INFO L226 Difference]: Without dead ends: 31 [2020-12-23 07:46:40,081 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-12-23 07:46:40,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-12-23 07:46:40,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 23. [2020-12-23 07:46:40,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-12-23 07:46:40,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2020-12-23 07:46:40,087 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 14 [2020-12-23 07:46:40,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:46:40,088 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2020-12-23 07:46:40,088 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-23 07:46:40,088 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2020-12-23 07:46:40,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-23 07:46:40,089 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:46:40,089 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2020-12-23 07:46:40,289 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:46:40,290 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:46:40,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:46:40,292 INFO L82 PathProgramCache]: Analyzing trace with hash 699894435, now seen corresponding path program 1 times [2020-12-23 07:46:40,292 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:46:40,293 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322573695] [2020-12-23 07:46:40,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:46:40,310 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:46:40,310 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [132161133] [2020-12-23 07:46:40,311 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 07:46:40,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:46:40,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-23 07:46:40,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:46:40,527 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 07:46:40,528 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322573695] [2020-12-23 07:46:40,528 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:46:40,528 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [132161133] [2020-12-23 07:46:40,528 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:46:40,529 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-12-23 07:46:40,529 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383757125] [2020-12-23 07:46:40,529 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 07:46:40,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:46:40,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 07:46:40,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-23 07:46:40,531 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand 6 states. [2020-12-23 07:46:40,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:46:40,595 INFO L93 Difference]: Finished difference Result 27 states and 28 transitions. [2020-12-23 07:46:40,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-23 07:46:40,596 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2020-12-23 07:46:40,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:46:40,597 INFO L225 Difference]: With dead ends: 27 [2020-12-23 07:46:40,597 INFO L226 Difference]: Without dead ends: 23 [2020-12-23 07:46:40,598 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-12-23 07:46:40,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-12-23 07:46:40,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-12-23 07:46:40,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-12-23 07:46:40,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2020-12-23 07:46:40,603 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 15 [2020-12-23 07:46:40,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:46:40,604 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2020-12-23 07:46:40,604 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 07:46:40,604 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2020-12-23 07:46:40,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-23 07:46:40,605 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:46:40,605 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1] [2020-12-23 07:46:40,806 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:46:40,806 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:46:40,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:46:40,807 INFO L82 PathProgramCache]: Analyzing trace with hash -1664485700, now seen corresponding path program 1 times [2020-12-23 07:46:40,807 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:46:40,807 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364386513] [2020-12-23 07:46:40,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:46:40,821 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:46:40,821 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1681564959] [2020-12-23 07:46:40,821 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 07:46:40,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:46:40,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-23 07:46:40,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:46:41,010 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-12-23 07:46:41,010 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364386513] [2020-12-23 07:46:41,010 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:46:41,011 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1681564959] [2020-12-23 07:46:41,011 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 07:46:41,011 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-23 07:46:41,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934726987] [2020-12-23 07:46:41,012 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 07:46:41,012 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:46:41,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 07:46:41,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-23 07:46:41,013 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 5 states. [2020-12-23 07:46:45,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:46:45,200 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2020-12-23 07:46:45,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 07:46:45,201 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2020-12-23 07:46:45,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:46:45,202 INFO L225 Difference]: With dead ends: 27 [2020-12-23 07:46:45,202 INFO L226 Difference]: Without dead ends: 23 [2020-12-23 07:46:45,203 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-23 07:46:45,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-12-23 07:46:45,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-12-23 07:46:45,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-12-23 07:46:45,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2020-12-23 07:46:45,209 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 17 [2020-12-23 07:46:45,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:46:45,210 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2020-12-23 07:46:45,210 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 07:46:45,210 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2020-12-23 07:46:45,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-23 07:46:45,211 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:46:45,211 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1] [2020-12-23 07:46:45,424 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:46:45,425 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:46:45,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:46:45,426 INFO L82 PathProgramCache]: Analyzing trace with hash -58338866, now seen corresponding path program 3 times [2020-12-23 07:46:45,427 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:46:45,427 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810676544] [2020-12-23 07:46:45,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:46:45,442 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:46:45,442 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [19148443] [2020-12-23 07:46:45,442 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 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 07:46:45,500 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-23 07:46:45,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:46:45,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-23 07:46:45,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:46:50,187 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 07:46:52,205 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 07:47:07,203 WARN L197 SmtUtils]: Spent 10.11 s on a formula simplification that was a NOOP. DAG size: 33 [2020-12-23 07:47:13,271 WARN L838 $PredicateComparison]: unable to prove that (exists ((ULTIMATE.start_main_~z~0 Int) (ULTIMATE.start_main_~x~0 Int) (ULTIMATE.start_main_~y~0 Int)) (let ((.cse0 (+ ULTIMATE.start_main_~x~0 (- 1)))) (and (= (mod ULTIMATE.start_main_~y~0 ULTIMATE.start_main_~z~0) 0) (= (mod .cse0 ULTIMATE.start_main_~z~0) 0) (let ((.cse1 (div .cse0 ULTIMATE.start_main_~z~0))) (= (+ (* ULTIMATE.start_main_~z~0 (div ULTIMATE.start_main_~y~0 ULTIMATE.start_main_~z~0)) .cse1) (+ (* .cse1 ULTIMATE.start_main_~z~0) 1))) (not (= ULTIMATE.start_main_~z~0 0)) (not (= (+ ULTIMATE.start_main_~x~0 (* ULTIMATE.start_main_~z~0 ULTIMATE.start_main_~y~0)) (+ (* ULTIMATE.start_main_~z~0 ULTIMATE.start_main_~x~0) 1)))))) is different from false [2020-12-23 07:47:13,283 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-12-23 07:47:13,284 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810676544] [2020-12-23 07:47:13,284 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:47:13,284 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [19148443] [2020-12-23 07:47:13,285 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:47:13,285 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-12-23 07:47:13,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898689081] [2020-12-23 07:47:13,285 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-23 07:47:13,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:47:13,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-23 07:47:13,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=20, Unknown=3, NotChecked=8, Total=42 [2020-12-23 07:47:13,287 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 7 states. [2020-12-23 07:47:22,014 WARN L197 SmtUtils]: Spent 8.08 s on a formula simplification. DAG size of input: 37 DAG size of output: 12 [2020-12-23 07:47:41,987 WARN L197 SmtUtils]: Spent 9.41 s on a formula simplification that was a NOOP. DAG size: 38 [2020-12-23 07:49:34,658 WARN L197 SmtUtils]: Spent 1.68 m on a formula simplification. DAG size of input: 41 DAG size of output: 40 [2020-12-23 07:50:01,400 WARN L197 SmtUtils]: Spent 22.69 s on a formula simplification. DAG size of input: 41 DAG size of output: 29 [2020-12-23 07:50:53,972 WARN L197 SmtUtils]: Spent 26.03 s on a formula simplification that was a NOOP. DAG size: 37 [2020-12-23 07:50:57,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:50:57,994 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2020-12-23 07:50:58,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-23 07:50:58,007 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 18 [2020-12-23 07:50:58,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:50:58,008 INFO L225 Difference]: With dead ends: 23 [2020-12-23 07:50:58,008 INFO L226 Difference]: Without dead ends: 21 [2020-12-23 07:50:58,008 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 215.2s TimeCoverageRelationStatistics Valid=41, Invalid=55, Unknown=18, NotChecked=18, Total=132 [2020-12-23 07:50:58,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-12-23 07:50:58,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2020-12-23 07:50:58,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-12-23 07:50:58,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2020-12-23 07:50:58,015 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 18 [2020-12-23 07:50:58,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:50:58,016 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2020-12-23 07:50:58,016 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-23 07:50:58,016 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2020-12-23 07:50:58,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-23 07:50:58,016 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:50:58,017 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2020-12-23 07:50:58,217 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:50:58,218 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:50:58,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:50:58,219 INFO L82 PathProgramCache]: Analyzing trace with hash -1808548489, now seen corresponding path program 2 times [2020-12-23 07:50:58,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:50:58,220 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127942779] [2020-12-23 07:50:58,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:50:58,238 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:50:58,239 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1002801985] [2020-12-23 07:50:58,239 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:50:58,295 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 07:50:58,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:50:58,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-23 07:50:58,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:50:58,483 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:50:58,483 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127942779] [2020-12-23 07:50:58,484 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:50:58,484 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002801985] [2020-12-23 07:50:58,484 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:50:58,484 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-12-23 07:50:58,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405114247] [2020-12-23 07:50:58,485 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-23 07:50:58,485 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:50:58,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-23 07:50:58,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-23 07:50:58,486 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 7 states. [2020-12-23 07:50:58,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:50:58,661 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2020-12-23 07:50:58,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-23 07:50:58,664 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 19 [2020-12-23 07:50:58,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:50:58,664 INFO L225 Difference]: With dead ends: 28 [2020-12-23 07:50:58,664 INFO L226 Difference]: Without dead ends: 24 [2020-12-23 07:50:58,665 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2020-12-23 07:50:58,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-12-23 07:50:58,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-12-23 07:50:58,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-12-23 07:50:58,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2020-12-23 07:50:58,672 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 19 [2020-12-23 07:50:58,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:50:58,673 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2020-12-23 07:50:58,673 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-23 07:50:58,673 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2020-12-23 07:50:58,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-12-23 07:50:58,673 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:50:58,674 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2020-12-23 07:50:58,874 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:50:58,875 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:50:58,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:50:58,876 INFO L82 PathProgramCache]: Analyzing trace with hash 754083403, now seen corresponding path program 3 times [2020-12-23 07:50:58,876 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:50:58,877 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682129448] [2020-12-23 07:50:58,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:50:58,902 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:50:58,905 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [237190762] [2020-12-23 07:50:58,905 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 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 07:50:58,962 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-23 07:50:58,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:50:58,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-23 07:50:58,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:51:03,378 WARN L197 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-12-23 07:51:03,405 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 07:51:03,622 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-12-23 07:51:03,623 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682129448] [2020-12-23 07:51:03,623 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:51:03,623 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [237190762] [2020-12-23 07:51:03,623 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 07:51:03,624 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-23 07:51:03,624 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036953789] [2020-12-23 07:51:03,624 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 07:51:03,624 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:51:03,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 07:51:03,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=18, Unknown=2, NotChecked=0, Total=30 [2020-12-23 07:51:03,625 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 6 states.