/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/reducercommutativity/rangesum10.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 00:25:32,527 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 00:25:32,534 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 00:25:32,611 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-23 00:25:32,611 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-23 00:25:32,616 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-23 00:25:32,622 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-23 00:25:32,628 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-23 00:25:32,633 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-23 00:25:32,643 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-23 00:25:32,648 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-23 00:25:32,650 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-23 00:25:32,651 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 00:25:32,656 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 00:25:32,659 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 00:25:32,679 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 00:25:32,680 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 00:25:32,687 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 00:25:32,700 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 00:25:32,710 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 00:25:32,715 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 00:25:32,718 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 00:25:32,721 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 00:25:32,726 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 00:25:32,742 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-23 00:25:32,778 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 00:25:32,849 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 00:25:32,849 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 00:25:32,859 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 00:25:32,859 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 00:25:32,859 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 00:25:32,860 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 00:25:32,860 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 00:25:32,860 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 00:25:32,860 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-23 00:25:32,861 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 00:25:32,862 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-23 00:25:32,863 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-23 00:25:32,864 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 00:25:32,864 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-23 00:25:32,864 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 00:25:32,864 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 00:25:32,865 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 00:25:32,865 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 00:25:32,865 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 00:25:32,865 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 00:25:32,866 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-23 00:25:32,866 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 00:25:32,866 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 00:25:32,866 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-23 00:25:32,867 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 00:25:32,867 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 00:25:33,482 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 00:25:33,517 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 00:25:33,521 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 00:25:33,523 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 00:25:33,524 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 00:25:33,526 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/reducercommutativity/rangesum10.i [2020-12-23 00:25:33,638 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/2508ae805/19be16c1569e4f9eb1b62bca393606bc/FLAG22b8bc047 [2020-12-23 00:25:34,584 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 00:25:34,585 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/reducercommutativity/rangesum10.i [2020-12-23 00:25:34,600 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/2508ae805/19be16c1569e4f9eb1b62bca393606bc/FLAG22b8bc047 [2020-12-23 00:25:34,844 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/2508ae805/19be16c1569e4f9eb1b62bca393606bc [2020-12-23 00:25:34,851 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 00:25:34,857 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 00:25:34,862 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 00:25:34,863 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 00:25:34,868 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 00:25:34,869 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 12:25:34" (1/1) ... [2020-12-23 00:25:34,872 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6cd3f0ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:25:34, skipping insertion in model container [2020-12-23 00:25:34,872 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 12:25:34" (1/1) ... [2020-12-23 00:25:34,884 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 00:25:34,909 INFO L178 MainTranslator]: Built tables and reachable declarations left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~x,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~x,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~ret~0,] left hand side expression in assignment: lhs: VariableLHS[~i~1,] left hand side expression in assignment: lhs: VariableLHS[~ret~0,] left hand side expression in assignment: lhs: VariableLHS[~cnt~0,] left hand side expression in assignment: lhs: VariableLHS[~ret~1,] left hand side expression in assignment: lhs: VariableLHS[~temp~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~x~0,],[IntegerLiteral[0]]] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~x~0,],[IntegerLiteral[1]]] left hand side expression in assignment: lhs: VariableLHS[~ret2~0,] left hand side expression in assignment: lhs: VariableLHS[~temp~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~x~0,],[IdentifierExpression[~i~2,]]] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~x~0,],[IntegerLiteral[9]]] left hand side expression in assignment: lhs: VariableLHS[~ret5~0,] [2020-12-23 00:25:35,146 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/reducercommutativity/rangesum10.i[1465,1478] [2020-12-23 00:25:35,152 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 00:25:35,165 INFO L203 MainTranslator]: Completed pre-run left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~x,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~x,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~ret~0,] left hand side expression in assignment: lhs: VariableLHS[~i~1,] left hand side expression in assignment: lhs: VariableLHS[~ret~0,] left hand side expression in assignment: lhs: VariableLHS[~cnt~0,] left hand side expression in assignment: lhs: VariableLHS[~ret~1,] left hand side expression in assignment: lhs: VariableLHS[~temp~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#x~0,],base],StructAccessExpression[IdentifierExpression[~#x~0,],offset]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#x~0,],base],BinaryExpression[ARITHPLUS,IntegerLiteral[4],StructAccessExpression[IdentifierExpression[~#x~0,],offset]]]] left hand side expression in assignment: lhs: VariableLHS[~ret2~0,] left hand side expression in assignment: lhs: VariableLHS[~temp~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#x~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#x~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~2,]]]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#x~0,],base],BinaryExpression[ARITHPLUS,IntegerLiteral[36],StructAccessExpression[IdentifierExpression[~#x~0,],offset]]]] left hand side expression in assignment: lhs: VariableLHS[~ret5~0,] [2020-12-23 00:25:35,199 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/reducercommutativity/rangesum10.i[1465,1478] [2020-12-23 00:25:35,201 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 00:25:35,229 INFO L208 MainTranslator]: Completed translation [2020-12-23 00:25:35,230 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:25:35 WrapperNode [2020-12-23 00:25:35,230 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 00:25:35,232 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 00:25:35,232 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 00:25:35,233 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 00:25:35,245 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:25:35" (1/1) ... [2020-12-23 00:25:35,258 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:25:35" (1/1) ... [2020-12-23 00:25:35,300 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 00:25:35,302 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 00:25:35,303 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 00:25:35,303 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 00:25:35,318 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:25:35" (1/1) ... [2020-12-23 00:25:35,318 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:25:35" (1/1) ... [2020-12-23 00:25:35,322 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:25:35" (1/1) ... [2020-12-23 00:25:35,323 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:25:35" (1/1) ... [2020-12-23 00:25:35,332 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:25:35" (1/1) ... [2020-12-23 00:25:35,340 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:25:35" (1/1) ... [2020-12-23 00:25:35,344 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:25:35" (1/1) ... [2020-12-23 00:25:35,349 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 00:25:35,351 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 00:25:35,351 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 00:25:35,352 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 00:25:35,353 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:25:35" (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 00:25:35,510 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-23 00:25:35,511 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 00:25:35,511 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-23 00:25:35,511 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 00:25:35,511 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 00:25:35,511 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-23 00:25:35,512 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-23 00:25:36,263 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 00:25:36,263 INFO L299 CfgBuilder]: Removed 17 assume(true) statements. [2020-12-23 00:25:36,266 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 12:25:36 BoogieIcfgContainer [2020-12-23 00:25:36,266 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 00:25:36,269 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 00:25:36,270 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 00:25:36,276 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 00:25:36,277 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 12:25:34" (1/3) ... [2020-12-23 00:25:36,278 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@af9baea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 12:25:36, skipping insertion in model container [2020-12-23 00:25:36,279 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:25:35" (2/3) ... [2020-12-23 00:25:36,280 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@af9baea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 12:25:36, skipping insertion in model container [2020-12-23 00:25:36,281 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 12:25:36" (3/3) ... [2020-12-23 00:25:36,284 INFO L111 eAbstractionObserver]: Analyzing ICFG rangesum10.i [2020-12-23 00:25:36,297 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 00:25:36,307 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-23 00:25:36,344 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-23 00:25:36,388 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 00:25:36,388 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-23 00:25:36,388 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 00:25:36,389 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 00:25:36,389 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 00:25:36,389 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 00:25:36,389 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 00:25:36,389 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 00:25:36,418 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states. [2020-12-23 00:25:36,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-23 00:25:36,430 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:25:36,432 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 00:25:36,432 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:25:36,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:25:36,443 INFO L82 PathProgramCache]: Analyzing trace with hash -919167012, now seen corresponding path program 1 times [2020-12-23 00:25:36,460 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:25:36,461 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306604228] [2020-12-23 00:25:36,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:25:36,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:25:36,851 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 00:25:36,853 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306604228] [2020-12-23 00:25:36,855 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 00:25:36,856 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-23 00:25:36,858 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177284010] [2020-12-23 00:25:36,875 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-23 00:25:36,875 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:25:36,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-23 00:25:36,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-23 00:25:36,910 INFO L87 Difference]: Start difference. First operand 30 states. Second operand 2 states. [2020-12-23 00:25:36,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:25:36,938 INFO L93 Difference]: Finished difference Result 56 states and 86 transitions. [2020-12-23 00:25:36,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-23 00:25:36,940 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 17 [2020-12-23 00:25:36,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:25:36,957 INFO L225 Difference]: With dead ends: 56 [2020-12-23 00:25:36,958 INFO L226 Difference]: Without dead ends: 26 [2020-12-23 00:25:36,963 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 00:25:36,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-12-23 00:25:37,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-12-23 00:25:37,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-12-23 00:25:37,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 36 transitions. [2020-12-23 00:25:37,020 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 36 transitions. Word has length 17 [2020-12-23 00:25:37,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:25:37,021 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 36 transitions. [2020-12-23 00:25:37,021 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-23 00:25:37,022 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 36 transitions. [2020-12-23 00:25:37,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-23 00:25:37,023 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:25:37,023 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 00:25:37,024 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-23 00:25:37,024 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:25:37,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:25:37,026 INFO L82 PathProgramCache]: Analyzing trace with hash 164788593, now seen corresponding path program 1 times [2020-12-23 00:25:37,026 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:25:37,026 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10137198] [2020-12-23 00:25:37,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:25:37,074 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:25:37,074 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [549963476] [2020-12-23 00:25:37,075 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 00:25:37,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:25:37,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 2 conjunts are in the unsatisfiable core [2020-12-23 00:25:37,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:25:37,252 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 00:25:37,252 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10137198] [2020-12-23 00:25:37,252 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:25:37,253 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [549963476] [2020-12-23 00:25:37,253 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 00:25:37,253 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 00:25:37,254 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421119234] [2020-12-23 00:25:37,255 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 00:25:37,256 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:25:37,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 00:25:37,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 00:25:37,257 INFO L87 Difference]: Start difference. First operand 26 states and 36 transitions. Second operand 3 states. [2020-12-23 00:25:37,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:25:37,275 INFO L93 Difference]: Finished difference Result 50 states and 70 transitions. [2020-12-23 00:25:37,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 00:25:37,276 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-12-23 00:25:37,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:25:37,277 INFO L225 Difference]: With dead ends: 50 [2020-12-23 00:25:37,277 INFO L226 Difference]: Without dead ends: 28 [2020-12-23 00:25:37,278 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 00:25:37,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-12-23 00:25:37,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2020-12-23 00:25:37,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-12-23 00:25:37,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 37 transitions. [2020-12-23 00:25:37,285 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 37 transitions. Word has length 17 [2020-12-23 00:25:37,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:25:37,285 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 37 transitions. [2020-12-23 00:25:37,285 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 00:25:37,285 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 37 transitions. [2020-12-23 00:25:37,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-23 00:25:37,286 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:25:37,287 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 00:25:37,501 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-12-23 00:25:37,502 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:25:37,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:25:37,504 INFO L82 PathProgramCache]: Analyzing trace with hash -1403287377, now seen corresponding path program 1 times [2020-12-23 00:25:37,504 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:25:37,505 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277593165] [2020-12-23 00:25:37,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:25:37,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:25:37,595 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:25:37,599 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277593165] [2020-12-23 00:25:37,600 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [966840084] [2020-12-23 00:25:37,600 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 00:25:37,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:25:37,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 2 conjunts are in the unsatisfiable core [2020-12-23 00:25:37,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:25:37,715 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 00:25:37,716 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:25:37,716 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2020-12-23 00:25:37,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620967664] [2020-12-23 00:25:37,717 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 00:25:37,717 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:25:37,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 00:25:37,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-23 00:25:37,719 INFO L87 Difference]: Start difference. First operand 27 states and 37 transitions. Second operand 3 states. [2020-12-23 00:25:37,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:25:37,787 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2020-12-23 00:25:37,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 00:25:37,788 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-12-23 00:25:37,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:25:37,790 INFO L225 Difference]: With dead ends: 57 [2020-12-23 00:25:37,790 INFO L226 Difference]: Without dead ends: 36 [2020-12-23 00:25:37,791 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-23 00:25:37,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-12-23 00:25:37,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 33. [2020-12-23 00:25:37,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-12-23 00:25:37,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 43 transitions. [2020-12-23 00:25:37,801 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 43 transitions. Word has length 19 [2020-12-23 00:25:37,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:25:37,801 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 43 transitions. [2020-12-23 00:25:37,802 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 00:25:37,802 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 43 transitions. [2020-12-23 00:25:37,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-12-23 00:25:37,803 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:25:37,803 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:25:38,016 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:25:38,018 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:25:38,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:25:38,020 INFO L82 PathProgramCache]: Analyzing trace with hash -1132417868, now seen corresponding path program 1 times [2020-12-23 00:25:38,020 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:25:38,021 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219912171] [2020-12-23 00:25:38,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:25:38,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:25:38,096 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-23 00:25:38,096 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219912171] [2020-12-23 00:25:38,097 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1948013893] [2020-12-23 00:25:38,097 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 00:25:38,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:25:38,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 2 conjunts are in the unsatisfiable core [2020-12-23 00:25:38,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:25:38,214 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-23 00:25:38,215 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:25:38,215 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2020-12-23 00:25:38,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899674650] [2020-12-23 00:25:38,216 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 00:25:38,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:25:38,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 00:25:38,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-23 00:25:38,218 INFO L87 Difference]: Start difference. First operand 33 states and 43 transitions. Second operand 3 states. [2020-12-23 00:25:38,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:25:38,261 INFO L93 Difference]: Finished difference Result 46 states and 59 transitions. [2020-12-23 00:25:38,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 00:25:38,262 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2020-12-23 00:25:38,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:25:38,263 INFO L225 Difference]: With dead ends: 46 [2020-12-23 00:25:38,263 INFO L226 Difference]: Without dead ends: 35 [2020-12-23 00:25:38,264 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-23 00:25:38,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-12-23 00:25:38,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2020-12-23 00:25:38,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-12-23 00:25:38,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 44 transitions. [2020-12-23 00:25:38,271 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 44 transitions. Word has length 28 [2020-12-23 00:25:38,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:25:38,272 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 44 transitions. [2020-12-23 00:25:38,272 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 00:25:38,272 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 44 transitions. [2020-12-23 00:25:38,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-12-23 00:25:38,273 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:25:38,273 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:25:38,485 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:25:38,486 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:25:38,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:25:38,488 INFO L82 PathProgramCache]: Analyzing trace with hash 513768630, now seen corresponding path program 1 times [2020-12-23 00:25:38,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:25:38,489 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385560136] [2020-12-23 00:25:38,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:25:38,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:25:38,548 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-23 00:25:38,550 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385560136] [2020-12-23 00:25:38,551 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42453380] [2020-12-23 00:25:38,551 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 00:25:38,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:25:38,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-23 00:25:38,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:25:38,686 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-23 00:25:38,687 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:25:38,687 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2020-12-23 00:25:38,687 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387617060] [2020-12-23 00:25:38,688 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 00:25:38,688 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:25:38,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 00:25:38,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-23 00:25:38,690 INFO L87 Difference]: Start difference. First operand 34 states and 44 transitions. Second operand 3 states. [2020-12-23 00:25:38,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:25:38,765 INFO L93 Difference]: Finished difference Result 78 states and 103 transitions. [2020-12-23 00:25:38,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 00:25:38,767 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 30 [2020-12-23 00:25:38,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:25:38,768 INFO L225 Difference]: With dead ends: 78 [2020-12-23 00:25:38,769 INFO L226 Difference]: Without dead ends: 56 [2020-12-23 00:25:38,774 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-23 00:25:38,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-12-23 00:25:38,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 46. [2020-12-23 00:25:38,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-12-23 00:25:38,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 62 transitions. [2020-12-23 00:25:38,796 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 62 transitions. Word has length 30 [2020-12-23 00:25:38,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:25:38,797 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 62 transitions. [2020-12-23 00:25:38,797 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 00:25:38,797 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 62 transitions. [2020-12-23 00:25:38,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-12-23 00:25:38,798 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:25:38,799 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:25:39,013 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:25:39,014 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:25:39,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:25:39,018 INFO L82 PathProgramCache]: Analyzing trace with hash -303820238, now seen corresponding path program 1 times [2020-12-23 00:25:39,019 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:25:39,019 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044348800] [2020-12-23 00:25:39,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:25:39,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:25:39,090 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-23 00:25:39,091 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044348800] [2020-12-23 00:25:39,092 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1966976973] [2020-12-23 00:25:39,092 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 00:25:39,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:25:39,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-23 00:25:39,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:25:39,451 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-23 00:25:39,453 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:25:39,454 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-12-23 00:25:39,458 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206729363] [2020-12-23 00:25:39,459 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 00:25:39,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:25:39,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 00:25:39,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-23 00:25:39,466 INFO L87 Difference]: Start difference. First operand 46 states and 62 transitions. Second operand 5 states. [2020-12-23 00:25:39,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:25:39,557 INFO L93 Difference]: Finished difference Result 90 states and 122 transitions. [2020-12-23 00:25:39,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 00:25:39,564 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 30 [2020-12-23 00:25:39,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:25:39,566 INFO L225 Difference]: With dead ends: 90 [2020-12-23 00:25:39,566 INFO L226 Difference]: Without dead ends: 49 [2020-12-23 00:25:39,567 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-23 00:25:39,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-12-23 00:25:39,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2020-12-23 00:25:39,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-12-23 00:25:39,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 64 transitions. [2020-12-23 00:25:39,593 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 64 transitions. Word has length 30 [2020-12-23 00:25:39,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:25:39,594 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 64 transitions. [2020-12-23 00:25:39,594 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 00:25:39,597 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 64 transitions. [2020-12-23 00:25:39,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-12-23 00:25:39,600 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:25:39,600 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, 1, 1, 1, 1] [2020-12-23 00:25:39,803 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-12-23 00:25:39,804 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:25:39,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:25:39,807 INFO L82 PathProgramCache]: Analyzing trace with hash 612513716, now seen corresponding path program 2 times [2020-12-23 00:25:39,807 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:25:39,808 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567984574] [2020-12-23 00:25:39,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:25:39,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:25:39,950 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-23 00:25:39,951 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567984574] [2020-12-23 00:25:39,951 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [354648706] [2020-12-23 00:25:39,952 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 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 00:25:40,044 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-12-23 00:25:40,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:25:40,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 00:25:40,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:25:40,221 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-12-23 00:25:40,222 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:25:40,222 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [4] total 10 [2020-12-23 00:25:40,223 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937176786] [2020-12-23 00:25:40,224 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-23 00:25:40,225 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:25:40,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-23 00:25:40,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-12-23 00:25:40,226 INFO L87 Difference]: Start difference. First operand 48 states and 64 transitions. Second operand 8 states. [2020-12-23 00:25:40,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:25:40,423 INFO L93 Difference]: Finished difference Result 114 states and 143 transitions. [2020-12-23 00:25:40,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-23 00:25:40,424 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 32 [2020-12-23 00:25:40,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:25:40,431 INFO L225 Difference]: With dead ends: 114 [2020-12-23 00:25:40,431 INFO L226 Difference]: Without dead ends: 109 [2020-12-23 00:25:40,432 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-12-23 00:25:40,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-12-23 00:25:40,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 73. [2020-12-23 00:25:40,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-12-23 00:25:40,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 98 transitions. [2020-12-23 00:25:40,496 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 98 transitions. Word has length 32 [2020-12-23 00:25:40,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:25:40,497 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 98 transitions. [2020-12-23 00:25:40,497 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-23 00:25:40,497 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 98 transitions. [2020-12-23 00:25:40,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-12-23 00:25:40,501 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:25:40,502 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:25:40,710 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:25:40,711 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:25:40,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:25:40,713 INFO L82 PathProgramCache]: Analyzing trace with hash -582685651, now seen corresponding path program 1 times [2020-12-23 00:25:40,714 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:25:40,714 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898595379] [2020-12-23 00:25:40,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:25:40,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:25:40,783 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-12-23 00:25:40,784 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898595379] [2020-12-23 00:25:40,784 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2018677793] [2020-12-23 00:25:40,784 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 00:25:40,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:25:40,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-23 00:25:40,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:25:41,012 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-12-23 00:25:41,012 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:25:41,013 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 7 [2020-12-23 00:25:41,020 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020777483] [2020-12-23 00:25:41,024 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-23 00:25:41,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:25:41,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-23 00:25:41,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-23 00:25:41,031 INFO L87 Difference]: Start difference. First operand 73 states and 98 transitions. Second operand 7 states. [2020-12-23 00:25:41,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:25:41,222 INFO L93 Difference]: Finished difference Result 162 states and 221 transitions. [2020-12-23 00:25:41,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-23 00:25:41,223 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 35 [2020-12-23 00:25:41,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:25:41,231 INFO L225 Difference]: With dead ends: 162 [2020-12-23 00:25:41,231 INFO L226 Difference]: Without dead ends: 96 [2020-12-23 00:25:41,234 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 33 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 00:25:41,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-12-23 00:25:41,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 90. [2020-12-23 00:25:41,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-12-23 00:25:41,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 115 transitions. [2020-12-23 00:25:41,252 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 115 transitions. Word has length 35 [2020-12-23 00:25:41,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:25:41,252 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 115 transitions. [2020-12-23 00:25:41,253 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-23 00:25:41,253 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 115 transitions. [2020-12-23 00:25:41,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-12-23 00:25:41,255 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:25:41,255 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:25:41,468 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:25:41,470 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:25:41,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:25:41,472 INFO L82 PathProgramCache]: Analyzing trace with hash 2109979210, now seen corresponding path program 2 times [2020-12-23 00:25:41,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:25:41,473 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350943583] [2020-12-23 00:25:41,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:25:41,521 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:25:41,521 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1855851748] [2020-12-23 00:25:41,521 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:25:41,635 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 00:25:41,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:25:41,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-23 00:25:41,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:25:41,743 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2020-12-23 00:25:41,744 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350943583] [2020-12-23 00:25:41,744 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:25:41,745 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1855851748] [2020-12-23 00:25:41,745 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:25:41,745 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-12-23 00:25:41,746 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46982323] [2020-12-23 00:25:41,746 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 00:25:41,746 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:25:41,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 00:25:41,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-23 00:25:41,748 INFO L87 Difference]: Start difference. First operand 90 states and 115 transitions. Second operand 6 states. [2020-12-23 00:25:41,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:25:41,784 INFO L93 Difference]: Finished difference Result 174 states and 224 transitions. [2020-12-23 00:25:41,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 00:25:41,785 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 46 [2020-12-23 00:25:41,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:25:41,786 INFO L225 Difference]: With dead ends: 174 [2020-12-23 00:25:41,787 INFO L226 Difference]: Without dead ends: 93 [2020-12-23 00:25:41,788 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-23 00:25:41,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-12-23 00:25:41,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 92. [2020-12-23 00:25:41,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-12-23 00:25:41,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 117 transitions. [2020-12-23 00:25:41,798 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 117 transitions. Word has length 46 [2020-12-23 00:25:41,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:25:41,798 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 117 transitions. [2020-12-23 00:25:41,798 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 00:25:41,799 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 117 transitions. [2020-12-23 00:25:41,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-12-23 00:25:41,800 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:25:41,801 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:25:42,015 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-12-23 00:25:42,016 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:25:42,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:25:42,018 INFO L82 PathProgramCache]: Analyzing trace with hash 1002085324, now seen corresponding path program 3 times [2020-12-23 00:25:42,018 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:25:42,018 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012890441] [2020-12-23 00:25:42,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:25:42,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:25:42,081 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-12-23 00:25:42,082 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012890441] [2020-12-23 00:25:42,082 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 00:25:42,082 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-23 00:25:42,083 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303645701] [2020-12-23 00:25:42,085 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 00:25:42,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:25:42,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 00:25:42,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-23 00:25:42,087 INFO L87 Difference]: Start difference. First operand 92 states and 117 transitions. Second operand 4 states. [2020-12-23 00:25:42,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:25:42,185 INFO L93 Difference]: Finished difference Result 177 states and 232 transitions. [2020-12-23 00:25:42,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 00:25:42,186 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 48 [2020-12-23 00:25:42,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:25:42,188 INFO L225 Difference]: With dead ends: 177 [2020-12-23 00:25:42,188 INFO L226 Difference]: Without dead ends: 108 [2020-12-23 00:25:42,191 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-23 00:25:42,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-12-23 00:25:42,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 83. [2020-12-23 00:25:42,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-12-23 00:25:42,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 99 transitions. [2020-12-23 00:25:42,212 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 99 transitions. Word has length 48 [2020-12-23 00:25:42,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:25:42,212 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 99 transitions. [2020-12-23 00:25:42,213 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 00:25:42,213 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 99 transitions. [2020-12-23 00:25:42,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-12-23 00:25:42,220 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:25:42,220 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 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, 1, 1, 1, 1, 1, 1] [2020-12-23 00:25:42,220 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-23 00:25:42,221 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:25:42,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:25:42,221 INFO L82 PathProgramCache]: Analyzing trace with hash 238121238, now seen corresponding path program 1 times [2020-12-23 00:25:42,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:25:42,222 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913920144] [2020-12-23 00:25:42,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:25:42,265 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:25:42,266 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1778795309] [2020-12-23 00:25:42,266 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 00:25:42,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:25:42,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-23 00:25:42,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:25:42,559 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2020-12-23 00:25:42,560 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913920144] [2020-12-23 00:25:42,560 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:25:42,562 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1778795309] [2020-12-23 00:25:42,562 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:25:42,563 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-12-23 00:25:42,563 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776369248] [2020-12-23 00:25:42,564 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-23 00:25:42,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:25:42,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-23 00:25:42,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-23 00:25:42,567 INFO L87 Difference]: Start difference. First operand 83 states and 99 transitions. Second operand 7 states. [2020-12-23 00:25:42,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:25:42,605 INFO L93 Difference]: Finished difference Result 158 states and 190 transitions. [2020-12-23 00:25:42,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-23 00:25:42,606 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 54 [2020-12-23 00:25:42,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:25:42,608 INFO L225 Difference]: With dead ends: 158 [2020-12-23 00:25:42,608 INFO L226 Difference]: Without dead ends: 86 [2020-12-23 00:25:42,614 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-23 00:25:42,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-12-23 00:25:42,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2020-12-23 00:25:42,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-12-23 00:25:42,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 101 transitions. [2020-12-23 00:25:42,624 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 101 transitions. Word has length 54 [2020-12-23 00:25:42,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:25:42,625 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 101 transitions. [2020-12-23 00:25:42,625 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-23 00:25:42,625 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 101 transitions. [2020-12-23 00:25:42,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-12-23 00:25:42,628 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:25:42,628 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 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, 1, 1, 1, 1, 1, 1] [2020-12-23 00:25:42,841 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:25:42,842 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:25:42,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:25:42,844 INFO L82 PathProgramCache]: Analyzing trace with hash -428363624, now seen corresponding path program 2 times [2020-12-23 00:25:42,844 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:25:42,845 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261110065] [2020-12-23 00:25:42,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:25:42,863 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:25:42,863 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [791335482] [2020-12-23 00:25:42,864 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 00:25:42,977 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 00:25:42,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:25:42,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-23 00:25:42,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:25:43,103 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2020-12-23 00:25:43,103 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261110065] [2020-12-23 00:25:43,104 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:25:43,104 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [791335482] [2020-12-23 00:25:43,104 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:25:43,104 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-12-23 00:25:43,105 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233521560] [2020-12-23 00:25:43,105 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-23 00:25:43,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:25:43,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-23 00:25:43,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-23 00:25:43,107 INFO L87 Difference]: Start difference. First operand 85 states and 101 transitions. Second operand 8 states. [2020-12-23 00:25:43,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:25:43,154 INFO L93 Difference]: Finished difference Result 160 states and 192 transitions. [2020-12-23 00:25:43,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-23 00:25:43,155 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 56 [2020-12-23 00:25:43,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:25:43,156 INFO L225 Difference]: With dead ends: 160 [2020-12-23 00:25:43,156 INFO L226 Difference]: Without dead ends: 88 [2020-12-23 00:25:43,158 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-23 00:25:43,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-12-23 00:25:43,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 87. [2020-12-23 00:25:43,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-12-23 00:25:43,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 103 transitions. [2020-12-23 00:25:43,165 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 103 transitions. Word has length 56 [2020-12-23 00:25:43,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:25:43,166 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 103 transitions. [2020-12-23 00:25:43,166 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-23 00:25:43,166 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 103 transitions. [2020-12-23 00:25:43,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-12-23 00:25:43,167 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:25:43,167 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 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, 1, 1, 1, 1, 1, 1] [2020-12-23 00:25:43,381 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:25:43,383 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:25:43,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:25:43,384 INFO L82 PathProgramCache]: Analyzing trace with hash -970188902, now seen corresponding path program 3 times [2020-12-23 00:25:43,384 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:25:43,385 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606864918] [2020-12-23 00:25:43,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:25:43,404 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:25:43,404 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [388998121] [2020-12-23 00:25:43,405 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:25:43,500 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-23 00:25:43,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:25:43,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-23 00:25:43,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:25:43,581 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2020-12-23 00:25:43,582 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606864918] [2020-12-23 00:25:43,582 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:25:43,583 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [388998121] [2020-12-23 00:25:43,583 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 00:25:43,583 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-23 00:25:43,583 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403062913] [2020-12-23 00:25:43,584 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 00:25:43,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:25:43,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 00:25:43,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-23 00:25:43,586 INFO L87 Difference]: Start difference. First operand 87 states and 103 transitions. Second operand 4 states. [2020-12-23 00:25:43,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:25:43,630 INFO L93 Difference]: Finished difference Result 116 states and 138 transitions. [2020-12-23 00:25:43,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 00:25:43,630 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 58 [2020-12-23 00:25:43,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:25:43,631 INFO L225 Difference]: With dead ends: 116 [2020-12-23 00:25:43,632 INFO L226 Difference]: Without dead ends: 68 [2020-12-23 00:25:43,633 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-23 00:25:43,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-12-23 00:25:43,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 59. [2020-12-23 00:25:43,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-12-23 00:25:43,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 66 transitions. [2020-12-23 00:25:43,638 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 66 transitions. Word has length 58 [2020-12-23 00:25:43,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:25:43,639 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 66 transitions. [2020-12-23 00:25:43,639 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 00:25:43,639 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 66 transitions. [2020-12-23 00:25:43,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-12-23 00:25:43,640 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:25:43,640 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 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, 1, 1, 1, 1, 1, 1] [2020-12-23 00:25:43,850 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-12-23 00:25:43,851 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:25:43,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:25:43,853 INFO L82 PathProgramCache]: Analyzing trace with hash -152540452, now seen corresponding path program 1 times [2020-12-23 00:25:43,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:25:43,853 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86052172] [2020-12-23 00:25:43,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:25:43,885 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:25:43,886 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1671908227] [2020-12-23 00:25:43,886 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 00:25:43,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:25:43,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-23 00:25:43,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:25:44,146 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2020-12-23 00:25:44,147 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86052172] [2020-12-23 00:25:44,147 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:25:44,148 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671908227] [2020-12-23 00:25:44,148 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:25:44,148 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-12-23 00:25:44,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620791564] [2020-12-23 00:25:44,149 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-23 00:25:44,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:25:44,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-23 00:25:44,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-23 00:25:44,151 INFO L87 Difference]: Start difference. First operand 59 states and 66 transitions. Second operand 9 states. [2020-12-23 00:25:44,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:25:44,198 INFO L93 Difference]: Finished difference Result 106 states and 120 transitions. [2020-12-23 00:25:44,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-23 00:25:44,199 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 58 [2020-12-23 00:25:44,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:25:44,199 INFO L225 Difference]: With dead ends: 106 [2020-12-23 00:25:44,200 INFO L226 Difference]: Without dead ends: 62 [2020-12-23 00:25:44,201 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-23 00:25:44,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-12-23 00:25:44,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2020-12-23 00:25:44,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-12-23 00:25:44,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 68 transitions. [2020-12-23 00:25:44,208 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 68 transitions. Word has length 58 [2020-12-23 00:25:44,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:25:44,208 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 68 transitions. [2020-12-23 00:25:44,208 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-23 00:25:44,208 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 68 transitions. [2020-12-23 00:25:44,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-12-23 00:25:44,209 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:25:44,209 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 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, 1, 1, 1, 1, 1, 1] [2020-12-23 00:25:44,416 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-23 00:25:44,416 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:25:44,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:25:44,418 INFO L82 PathProgramCache]: Analyzing trace with hash -1155589794, now seen corresponding path program 2 times [2020-12-23 00:25:44,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:25:44,419 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109519078] [2020-12-23 00:25:44,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:25:44,437 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:25:44,437 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [935260716] [2020-12-23 00:25:44,437 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 00:25:44,549 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 00:25:44,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:25:44,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-23 00:25:44,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:25:44,693 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2020-12-23 00:25:44,694 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109519078] [2020-12-23 00:25:44,694 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:25:44,694 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [935260716] [2020-12-23 00:25:44,695 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:25:44,695 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-12-23 00:25:44,695 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663754072] [2020-12-23 00:25:44,696 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-23 00:25:44,696 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:25:44,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-23 00:25:44,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-12-23 00:25:44,697 INFO L87 Difference]: Start difference. First operand 61 states and 68 transitions. Second operand 10 states. [2020-12-23 00:25:44,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:25:44,751 INFO L93 Difference]: Finished difference Result 108 states and 122 transitions. [2020-12-23 00:25:44,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-23 00:25:44,752 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 60 [2020-12-23 00:25:44,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:25:44,753 INFO L225 Difference]: With dead ends: 108 [2020-12-23 00:25:44,753 INFO L226 Difference]: Without dead ends: 64 [2020-12-23 00:25:44,754 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-12-23 00:25:44,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-12-23 00:25:44,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2020-12-23 00:25:44,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-12-23 00:25:44,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 70 transitions. [2020-12-23 00:25:44,760 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 70 transitions. Word has length 60 [2020-12-23 00:25:44,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:25:44,760 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 70 transitions. [2020-12-23 00:25:44,760 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-23 00:25:44,760 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 70 transitions. [2020-12-23 00:25:44,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-12-23 00:25:44,761 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:25:44,761 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 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, 1, 1, 1, 1, 1, 1] [2020-12-23 00:25:44,977 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-12-23 00:25:44,978 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:25:44,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:25:44,980 INFO L82 PathProgramCache]: Analyzing trace with hash 1281634144, now seen corresponding path program 3 times [2020-12-23 00:25:44,980 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:25:44,981 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444016411] [2020-12-23 00:25:44,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:25:45,005 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:25:45,006 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1404668667] [2020-12-23 00:25:45,006 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 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 00:25:45,115 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-23 00:25:45,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:25:45,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-23 00:25:45,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:25:45,209 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-12-23 00:25:45,210 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444016411] [2020-12-23 00:25:45,210 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:25:45,221 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1404668667] [2020-12-23 00:25:45,223 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:25:45,224 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-12-23 00:25:45,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355797232] [2020-12-23 00:25:45,224 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 00:25:45,225 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:25:45,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 00:25:45,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-23 00:25:45,226 INFO L87 Difference]: Start difference. First operand 63 states and 70 transitions. Second operand 4 states. [2020-12-23 00:25:45,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:25:45,256 INFO L93 Difference]: Finished difference Result 82 states and 91 transitions. [2020-12-23 00:25:45,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 00:25:45,257 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 62 [2020-12-23 00:25:45,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:25:45,258 INFO L225 Difference]: With dead ends: 82 [2020-12-23 00:25:45,258 INFO L226 Difference]: Without dead ends: 66 [2020-12-23 00:25:45,259 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-23 00:25:45,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-12-23 00:25:45,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 65. [2020-12-23 00:25:45,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-12-23 00:25:45,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 72 transitions. [2020-12-23 00:25:45,264 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 72 transitions. Word has length 62 [2020-12-23 00:25:45,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:25:45,264 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 72 transitions. [2020-12-23 00:25:45,264 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 00:25:45,264 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 72 transitions. [2020-12-23 00:25:45,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-23 00:25:45,265 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:25:45,265 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:25:45,471 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:25:45,472 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:25:45,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:25:45,473 INFO L82 PathProgramCache]: Analyzing trace with hash 377274978, now seen corresponding path program 4 times [2020-12-23 00:25:45,474 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:25:45,474 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721181287] [2020-12-23 00:25:45,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:25:45,492 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:25:45,492 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1361926114] [2020-12-23 00:25:45,492 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 00:25:45,555 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 00:25:45,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:25:45,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-23 00:25:45,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:25:45,661 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2020-12-23 00:25:45,662 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721181287] [2020-12-23 00:25:45,662 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:25:45,662 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1361926114] [2020-12-23 00:25:45,662 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:25:45,663 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-12-23 00:25:45,663 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182419642] [2020-12-23 00:25:45,664 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 00:25:45,665 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:25:45,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 00:25:45,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-23 00:25:45,666 INFO L87 Difference]: Start difference. First operand 65 states and 72 transitions. Second operand 5 states. [2020-12-23 00:25:45,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:25:45,777 INFO L93 Difference]: Finished difference Result 117 states and 133 transitions. [2020-12-23 00:25:45,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 00:25:45,778 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 64 [2020-12-23 00:25:45,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:25:45,779 INFO L225 Difference]: With dead ends: 117 [2020-12-23 00:25:45,779 INFO L226 Difference]: Without dead ends: 77 [2020-12-23 00:25:45,781 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-23 00:25:45,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-12-23 00:25:45,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 74. [2020-12-23 00:25:45,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-12-23 00:25:45,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 81 transitions. [2020-12-23 00:25:45,788 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 81 transitions. Word has length 64 [2020-12-23 00:25:45,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:25:45,790 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 81 transitions. [2020-12-23 00:25:45,791 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 00:25:45,791 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 81 transitions. [2020-12-23 00:25:45,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-12-23 00:25:45,796 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:25:45,796 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:25:45,997 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-23 00:25:45,998 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:25:46,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:25:46,000 INFO L82 PathProgramCache]: Analyzing trace with hash -790114983, now seen corresponding path program 5 times [2020-12-23 00:25:46,000 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:25:46,000 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305172364] [2020-12-23 00:25:46,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:25:46,019 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:25:46,019 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1707971232] [2020-12-23 00:25:46,019 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 00:25:46,168 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-12-23 00:25:46,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:25:46,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-23 00:25:46,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:25:46,281 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 7 proven. 15 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2020-12-23 00:25:46,282 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305172364] [2020-12-23 00:25:46,282 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:25:46,283 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1707971232] [2020-12-23 00:25:46,283 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:25:46,283 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-12-23 00:25:46,283 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453168624] [2020-12-23 00:25:46,284 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 00:25:46,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:25:46,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 00:25:46,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-23 00:25:46,287 INFO L87 Difference]: Start difference. First operand 74 states and 81 transitions. Second operand 6 states. [2020-12-23 00:25:46,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:25:46,433 INFO L93 Difference]: Finished difference Result 132 states and 148 transitions. [2020-12-23 00:25:46,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 00:25:46,434 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 73 [2020-12-23 00:25:46,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:25:46,435 INFO L225 Difference]: With dead ends: 132 [2020-12-23 00:25:46,435 INFO L226 Difference]: Without dead ends: 86 [2020-12-23 00:25:46,436 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-23 00:25:46,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-12-23 00:25:46,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 83. [2020-12-23 00:25:46,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-12-23 00:25:46,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 90 transitions. [2020-12-23 00:25:46,442 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 90 transitions. Word has length 73 [2020-12-23 00:25:46,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:25:46,443 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 90 transitions. [2020-12-23 00:25:46,443 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 00:25:46,443 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 90 transitions. [2020-12-23 00:25:46,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-12-23 00:25:46,445 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:25:46,445 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 5, 5, 5, 5, 5, 5, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:25:46,658 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-23 00:25:46,659 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:25:46,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:25:46,660 INFO L82 PathProgramCache]: Analyzing trace with hash 426299330, now seen corresponding path program 6 times [2020-12-23 00:25:46,660 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:25:46,660 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132423877] [2020-12-23 00:25:46,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:25:46,684 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:25:46,684 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1445797975] [2020-12-23 00:25:46,685 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 00:25:47,129 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-12-23 00:25:47,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:25:47,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-23 00:25:47,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:25:47,238 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2020-12-23 00:25:47,239 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132423877] [2020-12-23 00:25:47,239 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:25:47,240 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1445797975] [2020-12-23 00:25:47,240 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:25:47,240 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-12-23 00:25:47,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710944399] [2020-12-23 00:25:47,241 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 00:25:47,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:25:47,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 00:25:47,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-23 00:25:47,242 INFO L87 Difference]: Start difference. First operand 83 states and 90 transitions. Second operand 5 states. [2020-12-23 00:25:47,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:25:47,274 INFO L93 Difference]: Finished difference Result 108 states and 117 transitions. [2020-12-23 00:25:47,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 00:25:47,275 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 82 [2020-12-23 00:25:47,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:25:47,276 INFO L225 Difference]: With dead ends: 108 [2020-12-23 00:25:47,276 INFO L226 Difference]: Without dead ends: 86 [2020-12-23 00:25:47,277 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-23 00:25:47,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-12-23 00:25:47,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2020-12-23 00:25:47,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-12-23 00:25:47,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 92 transitions. [2020-12-23 00:25:47,283 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 92 transitions. Word has length 82 [2020-12-23 00:25:47,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:25:47,284 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 92 transitions. [2020-12-23 00:25:47,284 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 00:25:47,284 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 92 transitions. [2020-12-23 00:25:47,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-12-23 00:25:47,285 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:25:47,285 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:25:47,500 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:25:47,501 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:25:47,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:25:47,503 INFO L82 PathProgramCache]: Analyzing trace with hash -105690940, now seen corresponding path program 7 times [2020-12-23 00:25:47,503 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:25:47,503 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551570344] [2020-12-23 00:25:47,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:25:47,524 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:25:47,525 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [915111250] [2020-12-23 00:25:47,525 INFO L93 rtionOrderModulation]: Changing assertion order to 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 00:25:47,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:25:47,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-23 00:25:47,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:25:47,801 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2020-12-23 00:25:47,801 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551570344] [2020-12-23 00:25:47,801 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:25:47,802 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [915111250] [2020-12-23 00:25:47,802 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:25:47,802 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-12-23 00:25:47,802 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465291331] [2020-12-23 00:25:47,803 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-23 00:25:47,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:25:47,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-23 00:25:47,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-23 00:25:47,805 INFO L87 Difference]: Start difference. First operand 85 states and 92 transitions. Second operand 11 states. [2020-12-23 00:25:47,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:25:47,861 INFO L93 Difference]: Finished difference Result 154 states and 168 transitions. [2020-12-23 00:25:47,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-23 00:25:47,864 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 84 [2020-12-23 00:25:47,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:25:47,865 INFO L225 Difference]: With dead ends: 154 [2020-12-23 00:25:47,865 INFO L226 Difference]: Without dead ends: 88 [2020-12-23 00:25:47,866 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-23 00:25:47,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-12-23 00:25:47,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 87. [2020-12-23 00:25:47,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-12-23 00:25:47,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 94 transitions. [2020-12-23 00:25:47,872 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 94 transitions. Word has length 84 [2020-12-23 00:25:47,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:25:47,873 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 94 transitions. [2020-12-23 00:25:47,873 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-23 00:25:47,873 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 94 transitions. [2020-12-23 00:25:47,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-12-23 00:25:47,874 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:25:47,874 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:25:48,088 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:25:48,089 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:25:48,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:25:48,090 INFO L82 PathProgramCache]: Analyzing trace with hash 2063005894, now seen corresponding path program 8 times [2020-12-23 00:25:48,091 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:25:48,091 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135456069] [2020-12-23 00:25:48,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:25:48,110 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:25:48,111 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [524104514] [2020-12-23 00:25:48,111 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 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 00:25:48,256 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 00:25:48,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:25:48,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-23 00:25:48,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:25:48,476 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2020-12-23 00:25:48,477 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135456069] [2020-12-23 00:25:48,477 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:25:48,477 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [524104514] [2020-12-23 00:25:48,477 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:25:48,478 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-12-23 00:25:48,478 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153666666] [2020-12-23 00:25:48,478 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-23 00:25:48,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:25:48,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-23 00:25:48,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-23 00:25:48,480 INFO L87 Difference]: Start difference. First operand 87 states and 94 transitions. Second operand 12 states. [2020-12-23 00:25:48,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:25:48,546 INFO L93 Difference]: Finished difference Result 155 states and 169 transitions. [2020-12-23 00:25:48,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-23 00:25:48,547 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 86 [2020-12-23 00:25:48,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:25:48,548 INFO L225 Difference]: With dead ends: 155 [2020-12-23 00:25:48,549 INFO L226 Difference]: Without dead ends: 89 [2020-12-23 00:25:48,550 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-23 00:25:48,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-12-23 00:25:48,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2020-12-23 00:25:48,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-12-23 00:25:48,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 96 transitions. [2020-12-23 00:25:48,558 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 96 transitions. Word has length 86 [2020-12-23 00:25:48,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:25:48,559 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 96 transitions. [2020-12-23 00:25:48,559 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-23 00:25:48,559 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 96 transitions. [2020-12-23 00:25:48,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-12-23 00:25:48,560 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:25:48,561 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:25:48,776 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:25:48,777 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:25:48,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:25:48,778 INFO L82 PathProgramCache]: Analyzing trace with hash -1173442488, now seen corresponding path program 9 times [2020-12-23 00:25:48,778 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:25:48,779 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252979046] [2020-12-23 00:25:48,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:25:48,798 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:25:48,799 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [579820727] [2020-12-23 00:25:48,799 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 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 00:25:49,209 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-23 00:25:49,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:25:49,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-23 00:25:49,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:25:49,309 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 194 trivial. 0 not checked. [2020-12-23 00:25:49,310 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252979046] [2020-12-23 00:25:49,310 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:25:49,310 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [579820727] [2020-12-23 00:25:49,310 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:25:49,311 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-12-23 00:25:49,311 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993724267] [2020-12-23 00:25:49,312 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 00:25:49,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:25:49,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 00:25:49,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-23 00:25:49,313 INFO L87 Difference]: Start difference. First operand 89 states and 96 transitions. Second operand 5 states. [2020-12-23 00:25:49,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:25:49,414 INFO L93 Difference]: Finished difference Result 153 states and 173 transitions. [2020-12-23 00:25:49,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 00:25:49,419 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 88 [2020-12-23 00:25:49,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:25:49,420 INFO L225 Difference]: With dead ends: 153 [2020-12-23 00:25:49,420 INFO L226 Difference]: Without dead ends: 104 [2020-12-23 00:25:49,421 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-23 00:25:49,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-12-23 00:25:49,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 98. [2020-12-23 00:25:49,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-12-23 00:25:49,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 108 transitions. [2020-12-23 00:25:49,429 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 108 transitions. Word has length 88 [2020-12-23 00:25:49,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:25:49,429 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 108 transitions. [2020-12-23 00:25:49,429 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 00:25:49,429 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 108 transitions. [2020-12-23 00:25:49,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-12-23 00:25:49,431 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:25:49,431 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 6, 6, 6, 6, 6, 6, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:25:49,647 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-12-23 00:25:49,647 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:25:49,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:25:49,649 INFO L82 PathProgramCache]: Analyzing trace with hash -1409703947, now seen corresponding path program 10 times [2020-12-23 00:25:49,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:25:49,650 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593873540] [2020-12-23 00:25:49,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:25:49,671 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:25:49,672 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1560242335] [2020-12-23 00:25:49,672 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 00:25:49,753 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 00:25:49,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:25:49,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-23 00:25:49,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:25:49,894 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 23 proven. 26 refuted. 0 times theorem prover too weak. 213 trivial. 0 not checked. [2020-12-23 00:25:49,895 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593873540] [2020-12-23 00:25:49,895 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:25:49,896 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1560242335] [2020-12-23 00:25:49,896 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:25:49,896 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-12-23 00:25:49,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908483981] [2020-12-23 00:25:49,897 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-23 00:25:49,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:25:49,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-23 00:25:49,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-23 00:25:49,898 INFO L87 Difference]: Start difference. First operand 98 states and 108 transitions. Second operand 7 states. [2020-12-23 00:25:50,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:25:50,039 INFO L93 Difference]: Finished difference Result 173 states and 195 transitions. [2020-12-23 00:25:50,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-23 00:25:50,040 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 97 [2020-12-23 00:25:50,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:25:50,041 INFO L225 Difference]: With dead ends: 173 [2020-12-23 00:25:50,041 INFO L226 Difference]: Without dead ends: 110 [2020-12-23 00:25:50,042 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-23 00:25:50,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-12-23 00:25:50,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 107. [2020-12-23 00:25:50,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-12-23 00:25:50,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 117 transitions. [2020-12-23 00:25:50,050 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 117 transitions. Word has length 97 [2020-12-23 00:25:50,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:25:50,050 INFO L481 AbstractCegarLoop]: Abstraction has 107 states and 117 transitions. [2020-12-23 00:25:50,050 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-23 00:25:50,050 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 117 transitions. [2020-12-23 00:25:50,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-12-23 00:25:50,052 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:25:50,052 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 7, 7, 7, 7, 7, 7, 5, 5, 5, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:25:50,266 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-12-23 00:25:50,267 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:25:50,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:25:50,268 INFO L82 PathProgramCache]: Analyzing trace with hash -983224722, now seen corresponding path program 11 times [2020-12-23 00:25:50,268 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:25:50,269 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74639477] [2020-12-23 00:25:50,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:25:50,291 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:25:50,291 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1595039074] [2020-12-23 00:25:50,291 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 00:25:50,643 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2020-12-23 00:25:50,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:25:50,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-23 00:25:50,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:25:50,820 INFO L134 CoverageAnalysis]: Checked inductivity of 319 backedges. 28 proven. 40 refuted. 0 times theorem prover too weak. 251 trivial. 0 not checked. [2020-12-23 00:25:50,821 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74639477] [2020-12-23 00:25:50,821 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:25:50,821 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1595039074] [2020-12-23 00:25:50,821 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:25:50,821 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-12-23 00:25:50,822 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231206363] [2020-12-23 00:25:50,822 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-23 00:25:50,822 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:25:50,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-23 00:25:50,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-23 00:25:50,823 INFO L87 Difference]: Start difference. First operand 107 states and 117 transitions. Second operand 8 states. [2020-12-23 00:25:51,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:25:51,001 INFO L93 Difference]: Finished difference Result 185 states and 207 transitions. [2020-12-23 00:25:51,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-23 00:25:51,002 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 106 [2020-12-23 00:25:51,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:25:51,003 INFO L225 Difference]: With dead ends: 185 [2020-12-23 00:25:51,003 INFO L226 Difference]: Without dead ends: 116 [2020-12-23 00:25:51,004 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-23 00:25:51,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-12-23 00:25:51,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2020-12-23 00:25:51,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-12-23 00:25:51,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 126 transitions. [2020-12-23 00:25:51,012 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 126 transitions. Word has length 106 [2020-12-23 00:25:51,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:25:51,012 INFO L481 AbstractCegarLoop]: Abstraction has 116 states and 126 transitions. [2020-12-23 00:25:51,012 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-23 00:25:51,012 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 126 transitions. [2020-12-23 00:25:51,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-12-23 00:25:51,014 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:25:51,015 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 8, 8, 8, 8, 8, 8, 6, 6, 6, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:25:51,228 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:25:51,229 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:25:51,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:25:51,230 INFO L82 PathProgramCache]: Analyzing trace with hash -700509419, now seen corresponding path program 12 times [2020-12-23 00:25:51,231 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:25:51,231 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153155610] [2020-12-23 00:25:51,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:25:51,249 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:25:51,250 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1816278058] [2020-12-23 00:25:51,250 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 00:25:51,881 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-12-23 00:25:51,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:25:51,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-23 00:25:51,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:25:52,015 INFO L134 CoverageAnalysis]: Checked inductivity of 385 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2020-12-23 00:25:52,016 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153155610] [2020-12-23 00:25:52,016 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:25:52,016 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1816278058] [2020-12-23 00:25:52,017 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:25:52,017 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-12-23 00:25:52,017 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422263163] [2020-12-23 00:25:52,018 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 00:25:52,018 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:25:52,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 00:25:52,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-23 00:25:52,019 INFO L87 Difference]: Start difference. First operand 116 states and 126 transitions. Second operand 6 states. [2020-12-23 00:25:52,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:25:52,052 INFO L93 Difference]: Finished difference Result 150 states and 163 transitions. [2020-12-23 00:25:52,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 00:25:52,053 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 115 [2020-12-23 00:25:52,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:25:52,055 INFO L225 Difference]: With dead ends: 150 [2020-12-23 00:25:52,056 INFO L226 Difference]: Without dead ends: 119 [2020-12-23 00:25:52,056 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-23 00:25:52,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-12-23 00:25:52,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 118. [2020-12-23 00:25:52,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-12-23 00:25:52,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 128 transitions. [2020-12-23 00:25:52,064 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 128 transitions. Word has length 115 [2020-12-23 00:25:52,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:25:52,064 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 128 transitions. [2020-12-23 00:25:52,065 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 00:25:52,065 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 128 transitions. [2020-12-23 00:25:52,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-12-23 00:25:52,066 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:25:52,066 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 8, 8, 8, 8, 8, 8, 6, 6, 6, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:25:52,279 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-12-23 00:25:52,280 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:25:52,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:25:52,281 INFO L82 PathProgramCache]: Analyzing trace with hash -111816429, now seen corresponding path program 13 times [2020-12-23 00:25:52,282 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:25:52,282 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210104317] [2020-12-23 00:25:52,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:25:52,314 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:25:52,315 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1443339046] [2020-12-23 00:25:52,315 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:25:52,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:25:52,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-23 00:25:52,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:25:52,639 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2020-12-23 00:25:52,640 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210104317] [2020-12-23 00:25:52,640 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:25:52,640 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1443339046] [2020-12-23 00:25:52,640 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:25:52,640 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-12-23 00:25:52,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247321783] [2020-12-23 00:25:52,641 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-23 00:25:52,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:25:52,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-23 00:25:52,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-23 00:25:52,642 INFO L87 Difference]: Start difference. First operand 118 states and 128 transitions. Second operand 11 states. [2020-12-23 00:25:52,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:25:52,939 INFO L93 Difference]: Finished difference Result 202 states and 227 transitions. [2020-12-23 00:25:52,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-23 00:25:52,940 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 117 [2020-12-23 00:25:52,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:25:52,942 INFO L225 Difference]: With dead ends: 202 [2020-12-23 00:25:52,942 INFO L226 Difference]: Without dead ends: 133 [2020-12-23 00:25:52,943 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-23 00:25:52,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-12-23 00:25:52,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 127. [2020-12-23 00:25:52,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-12-23 00:25:52,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 140 transitions. [2020-12-23 00:25:52,958 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 140 transitions. Word has length 117 [2020-12-23 00:25:52,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:25:52,958 INFO L481 AbstractCegarLoop]: Abstraction has 127 states and 140 transitions. [2020-12-23 00:25:52,959 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-23 00:25:52,959 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 140 transitions. [2020-12-23 00:25:52,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-12-23 00:25:52,961 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:25:52,961 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 9, 6, 6, 6, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:25:53,176 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:25:53,177 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:25:53,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:25:53,179 INFO L82 PathProgramCache]: Analyzing trace with hash 1649695946, now seen corresponding path program 14 times [2020-12-23 00:25:53,179 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:25:53,179 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318550220] [2020-12-23 00:25:53,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:25:53,199 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:25:53,200 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1339420449] [2020-12-23 00:25:53,200 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 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 00:25:53,327 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 00:25:53,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:25:53,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-23 00:25:53,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:25:53,599 INFO L134 CoverageAnalysis]: Checked inductivity of 467 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 350 trivial. 0 not checked. [2020-12-23 00:25:53,600 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318550220] [2020-12-23 00:25:53,600 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:25:53,601 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1339420449] [2020-12-23 00:25:53,601 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:25:53,601 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-12-23 00:25:53,601 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259786913] [2020-12-23 00:25:53,602 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-23 00:25:53,602 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:25:53,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-23 00:25:53,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-23 00:25:53,604 INFO L87 Difference]: Start difference. First operand 127 states and 140 transitions. Second operand 12 states. [2020-12-23 00:25:53,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:25:53,909 INFO L93 Difference]: Finished difference Result 211 states and 238 transitions. [2020-12-23 00:25:53,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-23 00:25:53,910 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 126 [2020-12-23 00:25:53,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:25:53,911 INFO L225 Difference]: With dead ends: 211 [2020-12-23 00:25:53,911 INFO L226 Difference]: Without dead ends: 136 [2020-12-23 00:25:53,912 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-23 00:25:53,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-12-23 00:25:53,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 136. [2020-12-23 00:25:53,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-12-23 00:25:53,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 152 transitions. [2020-12-23 00:25:53,933 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 152 transitions. Word has length 126 [2020-12-23 00:25:53,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:25:53,933 INFO L481 AbstractCegarLoop]: Abstraction has 136 states and 152 transitions. [2020-12-23 00:25:53,934 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-23 00:25:53,934 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 152 transitions. [2020-12-23 00:25:53,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-12-23 00:25:53,936 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:25:53,936 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 6, 6, 6, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:25:54,149 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-12-23 00:25:54,150 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:25:54,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:25:54,151 INFO L82 PathProgramCache]: Analyzing trace with hash -242787085, now seen corresponding path program 15 times [2020-12-23 00:25:54,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:25:54,152 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967541706] [2020-12-23 00:25:54,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:25:54,195 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:25:54,195 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1033419826] [2020-12-23 00:25:54,196 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 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 00:25:54,558 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-12-23 00:25:54,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:25:54,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-23 00:25:54,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:25:54,764 INFO L134 CoverageAnalysis]: Checked inductivity of 551 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 535 trivial. 0 not checked. [2020-12-23 00:25:54,765 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967541706] [2020-12-23 00:25:54,765 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:25:54,765 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1033419826] [2020-12-23 00:25:54,765 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:25:54,765 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-12-23 00:25:54,766 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109342693] [2020-12-23 00:25:54,766 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-23 00:25:54,766 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:25:54,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-23 00:25:54,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-23 00:25:54,768 INFO L87 Difference]: Start difference. First operand 136 states and 152 transitions. Second operand 7 states. [2020-12-23 00:25:54,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:25:54,809 INFO L93 Difference]: Finished difference Result 176 states and 197 transitions. [2020-12-23 00:25:54,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-23 00:25:54,809 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 135 [2020-12-23 00:25:54,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:25:54,811 INFO L225 Difference]: With dead ends: 176 [2020-12-23 00:25:54,811 INFO L226 Difference]: Without dead ends: 139 [2020-12-23 00:25:54,813 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-23 00:25:54,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-12-23 00:25:54,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 138. [2020-12-23 00:25:54,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-12-23 00:25:54,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 154 transitions. [2020-12-23 00:25:54,824 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 154 transitions. Word has length 135 [2020-12-23 00:25:54,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:25:54,825 INFO L481 AbstractCegarLoop]: Abstraction has 138 states and 154 transitions. [2020-12-23 00:25:54,825 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-23 00:25:54,825 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 154 transitions. [2020-12-23 00:25:54,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2020-12-23 00:25:54,827 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:25:54,827 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 6, 6, 6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:25:55,042 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-12-23 00:25:55,043 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:25:55,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:25:55,045 INFO L82 PathProgramCache]: Analyzing trace with hash 1975493873, now seen corresponding path program 16 times [2020-12-23 00:25:55,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:25:55,046 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119302152] [2020-12-23 00:25:55,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:25:55,068 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:25:55,069 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [854601875] [2020-12-23 00:25:55,069 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:25:55,237 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 00:25:55,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:25:55,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-23 00:25:55,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:25:55,465 INFO L134 CoverageAnalysis]: Checked inductivity of 560 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 535 trivial. 0 not checked. [2020-12-23 00:25:55,466 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119302152] [2020-12-23 00:25:55,466 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:25:55,467 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [854601875] [2020-12-23 00:25:55,467 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:25:55,467 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-12-23 00:25:55,467 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574483635] [2020-12-23 00:25:55,468 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-23 00:25:55,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:25:55,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-23 00:25:55,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-23 00:25:55,470 INFO L87 Difference]: Start difference. First operand 138 states and 154 transitions. Second operand 8 states. [2020-12-23 00:25:55,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:25:55,522 INFO L93 Difference]: Finished difference Result 178 states and 199 transitions. [2020-12-23 00:25:55,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-23 00:25:55,523 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 137 [2020-12-23 00:25:55,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:25:55,525 INFO L225 Difference]: With dead ends: 178 [2020-12-23 00:25:55,526 INFO L226 Difference]: Without dead ends: 141 [2020-12-23 00:25:55,526 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-23 00:25:55,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-12-23 00:25:55,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 140. [2020-12-23 00:25:55,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-12-23 00:25:55,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 156 transitions. [2020-12-23 00:25:55,536 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 156 transitions. Word has length 137 [2020-12-23 00:25:55,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:25:55,537 INFO L481 AbstractCegarLoop]: Abstraction has 140 states and 156 transitions. [2020-12-23 00:25:55,537 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-23 00:25:55,537 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 156 transitions. [2020-12-23 00:25:55,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2020-12-23 00:25:55,539 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:25:55,539 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 6, 6, 6, 6, 6, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:25:55,747 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-12-23 00:25:55,748 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:25:55,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:25:55,749 INFO L82 PathProgramCache]: Analyzing trace with hash -855251601, now seen corresponding path program 17 times [2020-12-23 00:25:55,750 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:25:55,750 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290564667] [2020-12-23 00:25:55,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:25:55,772 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:25:55,772 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [313959863] [2020-12-23 00:25:55,773 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:25:56,670 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2020-12-23 00:25:56,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:25:56,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-23 00:25:56,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:25:56,872 INFO L134 CoverageAnalysis]: Checked inductivity of 571 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 535 trivial. 0 not checked. [2020-12-23 00:25:56,873 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290564667] [2020-12-23 00:25:56,873 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:25:56,874 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [313959863] [2020-12-23 00:25:56,874 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:25:56,874 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-12-23 00:25:56,874 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946124168] [2020-12-23 00:25:56,874 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-23 00:25:56,875 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:25:56,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-23 00:25:56,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-23 00:25:56,876 INFO L87 Difference]: Start difference. First operand 140 states and 156 transitions. Second operand 9 states. [2020-12-23 00:25:56,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:25:56,932 INFO L93 Difference]: Finished difference Result 180 states and 201 transitions. [2020-12-23 00:25:56,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-23 00:25:56,933 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 139 [2020-12-23 00:25:56,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:25:56,935 INFO L225 Difference]: With dead ends: 180 [2020-12-23 00:25:56,935 INFO L226 Difference]: Without dead ends: 143 [2020-12-23 00:25:56,936 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-23 00:25:56,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-12-23 00:25:56,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 142. [2020-12-23 00:25:56,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-12-23 00:25:56,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 158 transitions. [2020-12-23 00:25:56,945 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 158 transitions. Word has length 139 [2020-12-23 00:25:56,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:25:56,945 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 158 transitions. [2020-12-23 00:25:56,945 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-23 00:25:56,945 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 158 transitions. [2020-12-23 00:25:56,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2020-12-23 00:25:56,947 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:25:56,948 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 7, 7, 6, 6, 6, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:25:57,163 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:25:57,164 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:25:57,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:25:57,165 INFO L82 PathProgramCache]: Analyzing trace with hash 1807613549, now seen corresponding path program 18 times [2020-12-23 00:25:57,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:25:57,165 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573693184] [2020-12-23 00:25:57,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:25:57,183 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:25:57,184 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [74010174] [2020-12-23 00:25:57,184 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true