/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/array-examples/sanfoundry_02_ground.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-22 23:48:24,989 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 23:48:24,994 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 23:48:25,055 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 23:48:25,056 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 23:48:25,061 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 23:48:25,064 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 23:48:25,070 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 23:48:25,074 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 23:48:25,081 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 23:48:25,087 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 23:48:25,088 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 23:48:25,089 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 23:48:25,092 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 23:48:25,094 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 23:48:25,097 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 23:48:25,098 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 23:48:25,103 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 23:48:25,111 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 23:48:25,119 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 23:48:25,121 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 23:48:25,123 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 23:48:25,141 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 23:48:25,144 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 23:48:25,154 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 23:48:25,177 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 23:48:25,179 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 23:48:25,179 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 23:48:25,185 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 23:48:25,235 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 23:48:25,235 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 23:48:25,240 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 23:48:25,240 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 23:48:25,241 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 23:48:25,241 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 23:48:25,241 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 23:48:25,242 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 23:48:25,242 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 23:48:25,242 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 23:48:25,244 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 23:48:25,244 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 23:48:25,245 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 23:48:25,245 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 23:48:25,245 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 23:48:25,246 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 23:48:25,246 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 23:48:25,246 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 23:48:25,247 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 23:48:25,247 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 23:48:25,248 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 23:48:25,248 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 23:48:25,248 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 23:48:25,249 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 23:48:25,249 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 23:48:25,249 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 23:48:25,644 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 23:48:25,695 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 23:48:25,698 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 23:48:25,699 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 23:48:25,700 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 23:48:25,701 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/sanfoundry_02_ground.i [2020-12-22 23:48:25,807 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/910063b36/4869e17ee87742cd9beba79eaa6912db/FLAGa7f1e05ae [2020-12-22 23:48:26,492 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 23:48:26,493 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-examples/sanfoundry_02_ground.i [2020-12-22 23:48:26,507 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/910063b36/4869e17ee87742cd9beba79eaa6912db/FLAGa7f1e05ae [2020-12-22 23:48:26,821 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/910063b36/4869e17ee87742cd9beba79eaa6912db [2020-12-22 23:48:26,824 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 23:48:26,826 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 23:48:26,830 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 23:48:26,830 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 23:48:26,835 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 23:48:26,836 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 11:48:26" (1/1) ... [2020-12-22 23:48:26,842 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@683e3f7b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:48:26, skipping insertion in model container [2020-12-22 23:48:26,842 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 11:48:26" (1/1) ... [2020-12-22 23:48:26,852 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 23:48:26,873 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 23:48:27,015 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/array-examples/sanfoundry_02_ground.i[813,826] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~array~0,],[IdentifierExpression[~i~0,]]] left hand side expression in assignment: lhs: VariableLHS[~largest1~0,] left hand side expression in assignment: lhs: VariableLHS[~largest2~0,] left hand side expression in assignment: lhs: VariableLHS[~temp~0,] left hand side expression in assignment: lhs: VariableLHS[~largest1~0,] left hand side expression in assignment: lhs: VariableLHS[~largest2~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~largest2~0,] left hand side expression in assignment: lhs: VariableLHS[~largest1~0,] left hand side expression in assignment: lhs: VariableLHS[~largest2~0,] left hand side expression in assignment: lhs: VariableLHS[~x~0,] left hand side expression in assignment: lhs: VariableLHS[~x~0,] [2020-12-22 23:48:27,044 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 23:48:27,053 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 23:48:27,067 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/array-examples/sanfoundry_02_ground.i[813,826] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#array~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#array~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~largest1~0,] left hand side expression in assignment: lhs: VariableLHS[~largest2~0,] left hand side expression in assignment: lhs: VariableLHS[~temp~0,] left hand side expression in assignment: lhs: VariableLHS[~largest1~0,] left hand side expression in assignment: lhs: VariableLHS[~largest2~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~largest2~0,] left hand side expression in assignment: lhs: VariableLHS[~largest1~0,] left hand side expression in assignment: lhs: VariableLHS[~largest2~0,] left hand side expression in assignment: lhs: VariableLHS[~x~0,] left hand side expression in assignment: lhs: VariableLHS[~x~0,] [2020-12-22 23:48:27,079 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 23:48:27,096 INFO L208 MainTranslator]: Completed translation [2020-12-22 23:48:27,097 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:48:27 WrapperNode [2020-12-22 23:48:27,097 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 23:48:27,098 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 23:48:27,099 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 23:48:27,099 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 23:48:27,108 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:48:27" (1/1) ... [2020-12-22 23:48:27,116 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:48:27" (1/1) ... [2020-12-22 23:48:27,151 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 23:48:27,154 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 23:48:27,154 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 23:48:27,154 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 23:48:27,166 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:48:27" (1/1) ... [2020-12-22 23:48:27,166 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:48:27" (1/1) ... [2020-12-22 23:48:27,184 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:48:27" (1/1) ... [2020-12-22 23:48:27,184 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:48:27" (1/1) ... [2020-12-22 23:48:27,201 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:48:27" (1/1) ... [2020-12-22 23:48:27,210 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:48:27" (1/1) ... [2020-12-22 23:48:27,215 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:48:27" (1/1) ... [2020-12-22 23:48:27,218 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 23:48:27,222 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 23:48:27,222 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 23:48:27,223 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 23:48:27,224 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:48:27" (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 [2020-12-22 23:48:27,338 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 23:48:27,339 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 23:48:27,339 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-22 23:48:27,339 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 23:48:27,340 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 23:48:27,340 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-22 23:48:27,340 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-22 23:48:27,703 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 23:48:27,709 INFO L299 CfgBuilder]: Removed 12 assume(true) statements. [2020-12-22 23:48:27,714 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 11:48:27 BoogieIcfgContainer [2020-12-22 23:48:27,715 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 23:48:27,717 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 23:48:27,717 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 23:48:27,728 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 23:48:27,728 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 11:48:26" (1/3) ... [2020-12-22 23:48:27,732 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35875a2e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 11:48:27, skipping insertion in model container [2020-12-22 23:48:27,733 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:48:27" (2/3) ... [2020-12-22 23:48:27,733 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35875a2e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 11:48:27, skipping insertion in model container [2020-12-22 23:48:27,733 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 11:48:27" (3/3) ... [2020-12-22 23:48:27,735 INFO L111 eAbstractionObserver]: Analyzing ICFG sanfoundry_02_ground.i [2020-12-22 23:48:27,751 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 23:48:27,767 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-22 23:48:27,810 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-22 23:48:27,863 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 23:48:27,864 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 23:48:27,864 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 23:48:27,864 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 23:48:27,864 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 23:48:27,864 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 23:48:27,865 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 23:48:27,865 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 23:48:27,887 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states. [2020-12-22 23:48:27,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-22 23:48:27,896 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:48:27,897 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:48:27,897 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:48:27,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:48:27,906 INFO L82 PathProgramCache]: Analyzing trace with hash 660668040, now seen corresponding path program 1 times [2020-12-22 23:48:27,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:48:27,920 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676943485] [2020-12-22 23:48:27,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:48:28,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:28,199 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 23:48:28,200 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676943485] [2020-12-22 23:48:28,202 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 23:48:28,202 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 23:48:28,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102442150] [2020-12-22 23:48:28,210 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 23:48:28,210 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:48:28,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 23:48:28,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 23:48:28,232 INFO L87 Difference]: Start difference. First operand 31 states. Second operand 3 states. [2020-12-22 23:48:28,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:48:28,335 INFO L93 Difference]: Finished difference Result 60 states and 86 transitions. [2020-12-22 23:48:28,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 23:48:28,338 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2020-12-22 23:48:28,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:48:28,367 INFO L225 Difference]: With dead ends: 60 [2020-12-22 23:48:28,367 INFO L226 Difference]: Without dead ends: 29 [2020-12-22 23:48:28,376 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 23:48:28,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-12-22 23:48:28,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2020-12-22 23:48:28,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-12-22 23:48:28,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 35 transitions. [2020-12-22 23:48:28,510 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 35 transitions. Word has length 11 [2020-12-22 23:48:28,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:48:28,513 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 35 transitions. [2020-12-22 23:48:28,514 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 23:48:28,514 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 35 transitions. [2020-12-22 23:48:28,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-22 23:48:28,515 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:48:28,515 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:48:28,515 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 23:48:28,516 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:48:28,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:48:28,524 INFO L82 PathProgramCache]: Analyzing trace with hash 1809603638, now seen corresponding path program 1 times [2020-12-22 23:48:28,524 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:48:28,525 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853530569] [2020-12-22 23:48:28,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:48:28,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:28,571 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 23:48:28,572 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853530569] [2020-12-22 23:48:28,572 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1036481364] [2020-12-22 23:48:28,572 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 [2020-12-22 23:48:28,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:28,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 2 conjunts are in the unsatisfiable core [2020-12-22 23:48:28,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:48:28,677 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 23:48:28,677 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 23:48:28,677 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2020-12-22 23:48:28,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968682610] [2020-12-22 23:48:28,679 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 23:48:28,680 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:48:28,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 23:48:28,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 23:48:28,681 INFO L87 Difference]: Start difference. First operand 28 states and 35 transitions. Second operand 3 states. [2020-12-22 23:48:28,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:48:28,718 INFO L93 Difference]: Finished difference Result 49 states and 61 transitions. [2020-12-22 23:48:28,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 23:48:28,719 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2020-12-22 23:48:28,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:48:28,720 INFO L225 Difference]: With dead ends: 49 [2020-12-22 23:48:28,720 INFO L226 Difference]: Without dead ends: 33 [2020-12-22 23:48:28,721 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 23:48:28,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-12-22 23:48:28,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 29. [2020-12-22 23:48:28,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-12-22 23:48:28,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 36 transitions. [2020-12-22 23:48:28,728 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 36 transitions. Word has length 13 [2020-12-22 23:48:28,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:48:28,728 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 36 transitions. [2020-12-22 23:48:28,728 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 23:48:28,729 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 36 transitions. [2020-12-22 23:48:28,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-22 23:48:28,729 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:48:28,730 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:48:28,943 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-12-22 23:48:28,944 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:48:28,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:48:28,946 INFO L82 PathProgramCache]: Analyzing trace with hash -360176816, now seen corresponding path program 1 times [2020-12-22 23:48:28,947 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:48:28,947 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934851961] [2020-12-22 23:48:28,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:48:28,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:29,022 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 23:48:29,022 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934851961] [2020-12-22 23:48:29,023 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [959399674] [2020-12-22 23:48:29,024 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 [2020-12-22 23:48:29,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:29,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-22 23:48:29,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:48:29,140 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 23:48:29,141 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:48:29,141 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-12-22 23:48:29,141 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924441554] [2020-12-22 23:48:29,142 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 23:48:29,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:48:29,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 23:48:29,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 23:48:29,143 INFO L87 Difference]: Start difference. First operand 29 states and 36 transitions. Second operand 5 states. [2020-12-22 23:48:29,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:48:29,177 INFO L93 Difference]: Finished difference Result 56 states and 70 transitions. [2020-12-22 23:48:29,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 23:48:29,177 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-12-22 23:48:29,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:48:29,178 INFO L225 Difference]: With dead ends: 56 [2020-12-22 23:48:29,178 INFO L226 Difference]: Without dead ends: 32 [2020-12-22 23:48:29,179 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 23:48:29,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-12-22 23:48:29,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2020-12-22 23:48:29,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-12-22 23:48:29,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 38 transitions. [2020-12-22 23:48:29,184 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 38 transitions. Word has length 16 [2020-12-22 23:48:29,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:48:29,185 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 38 transitions. [2020-12-22 23:48:29,185 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 23:48:29,185 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 38 transitions. [2020-12-22 23:48:29,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-22 23:48:29,186 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:48:29,186 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:48:29,400 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:48:29,401 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:48:29,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:48:29,402 INFO L82 PathProgramCache]: Analyzing trace with hash 1528902738, now seen corresponding path program 2 times [2020-12-22 23:48:29,403 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:48:29,403 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490244623] [2020-12-22 23:48:29,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:48:29,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:29,461 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 23:48:29,461 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490244623] [2020-12-22 23:48:29,462 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1889491546] [2020-12-22 23:48:29,462 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:48:29,520 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 23:48:29,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:48:29,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-22 23:48:29,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:48:29,595 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 23:48:29,596 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:48:29,596 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 7 [2020-12-22 23:48:29,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604765051] [2020-12-22 23:48:29,597 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 23:48:29,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:48:29,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 23:48:29,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2020-12-22 23:48:29,599 INFO L87 Difference]: Start difference. First operand 31 states and 38 transitions. Second operand 7 states. [2020-12-22 23:48:29,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:48:29,693 INFO L93 Difference]: Finished difference Result 67 states and 87 transitions. [2020-12-22 23:48:29,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 23:48:29,694 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 18 [2020-12-22 23:48:29,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:48:29,696 INFO L225 Difference]: With dead ends: 67 [2020-12-22 23:48:29,696 INFO L226 Difference]: Without dead ends: 43 [2020-12-22 23:48:29,699 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2020-12-22 23:48:29,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-12-22 23:48:29,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 39. [2020-12-22 23:48:29,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-12-22 23:48:29,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 48 transitions. [2020-12-22 23:48:29,722 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 48 transitions. Word has length 18 [2020-12-22 23:48:29,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:48:29,723 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 48 transitions. [2020-12-22 23:48:29,723 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 23:48:29,724 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 48 transitions. [2020-12-22 23:48:29,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-12-22 23:48:29,724 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:48:29,725 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:48:29,939 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:48:29,940 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:48:29,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:48:29,941 INFO L82 PathProgramCache]: Analyzing trace with hash 416837296, now seen corresponding path program 3 times [2020-12-22 23:48:29,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:48:29,943 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53243693] [2020-12-22 23:48:29,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:48:29,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:30,008 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-12-22 23:48:30,009 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53243693] [2020-12-22 23:48:30,009 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1076762952] [2020-12-22 23:48:30,009 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 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 [2020-12-22 23:48:30,074 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-22 23:48:30,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:48:30,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-22 23:48:30,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:48:30,149 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-12-22 23:48:30,149 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:48:30,150 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-12-22 23:48:30,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703212131] [2020-12-22 23:48:30,151 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 23:48:30,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:48:30,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 23:48:30,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-22 23:48:30,153 INFO L87 Difference]: Start difference. First operand 39 states and 48 transitions. Second operand 6 states. [2020-12-22 23:48:30,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:48:30,208 INFO L93 Difference]: Finished difference Result 62 states and 78 transitions. [2020-12-22 23:48:30,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 23:48:30,209 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 25 [2020-12-22 23:48:30,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:48:30,210 INFO L225 Difference]: With dead ends: 62 [2020-12-22 23:48:30,210 INFO L226 Difference]: Without dead ends: 46 [2020-12-22 23:48:30,211 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-22 23:48:30,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-12-22 23:48:30,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 43. [2020-12-22 23:48:30,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-12-22 23:48:30,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 54 transitions. [2020-12-22 23:48:30,217 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 54 transitions. Word has length 25 [2020-12-22 23:48:30,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:48:30,217 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 54 transitions. [2020-12-22 23:48:30,217 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 23:48:30,218 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 54 transitions. [2020-12-22 23:48:30,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-12-22 23:48:30,219 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:48:30,219 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:48:30,434 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:48:30,435 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:48:30,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:48:30,436 INFO L82 PathProgramCache]: Analyzing trace with hash 1416775318, now seen corresponding path program 4 times [2020-12-22 23:48:30,438 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:48:30,439 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296317443] [2020-12-22 23:48:30,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:48:30,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:30,507 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-12-22 23:48:30,507 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296317443] [2020-12-22 23:48:30,508 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1630152074] [2020-12-22 23:48:30,508 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 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 [2020-12-22 23:48:30,576 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 23:48:30,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:48:30,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-22 23:48:30,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:48:30,619 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-12-22 23:48:30,620 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:48:30,620 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-12-22 23:48:30,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492024545] [2020-12-22 23:48:30,621 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 23:48:30,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:48:30,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 23:48:30,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-22 23:48:30,622 INFO L87 Difference]: Start difference. First operand 43 states and 54 transitions. Second operand 8 states. [2020-12-22 23:48:30,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:48:30,688 INFO L93 Difference]: Finished difference Result 81 states and 105 transitions. [2020-12-22 23:48:30,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 23:48:30,689 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 28 [2020-12-22 23:48:30,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:48:30,690 INFO L225 Difference]: With dead ends: 81 [2020-12-22 23:48:30,690 INFO L226 Difference]: Without dead ends: 49 [2020-12-22 23:48:30,691 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-22 23:48:30,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-12-22 23:48:30,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 45. [2020-12-22 23:48:30,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-12-22 23:48:30,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 56 transitions. [2020-12-22 23:48:30,697 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 56 transitions. Word has length 28 [2020-12-22 23:48:30,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:48:30,697 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 56 transitions. [2020-12-22 23:48:30,697 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 23:48:30,697 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 56 transitions. [2020-12-22 23:48:30,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-12-22 23:48:30,698 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:48:30,699 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:48:30,912 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-12-22 23:48:30,913 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:48:30,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:48:30,914 INFO L82 PathProgramCache]: Analyzing trace with hash 939517080, now seen corresponding path program 5 times [2020-12-22 23:48:30,915 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:48:30,915 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960032991] [2020-12-22 23:48:30,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:48:30,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:31,011 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-12-22 23:48:31,012 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960032991] [2020-12-22 23:48:31,012 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2146015505] [2020-12-22 23:48:31,012 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 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 [2020-12-22 23:48:31,080 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-12-22 23:48:31,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:48:31,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-22 23:48:31,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:48:31,119 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-12-22 23:48:31,120 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:48:31,120 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 8 [2020-12-22 23:48:31,120 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542322061] [2020-12-22 23:48:31,121 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 23:48:31,121 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:48:31,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 23:48:31,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-22 23:48:31,122 INFO L87 Difference]: Start difference. First operand 45 states and 56 transitions. Second operand 8 states. [2020-12-22 23:48:31,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:48:31,192 INFO L93 Difference]: Finished difference Result 87 states and 114 transitions. [2020-12-22 23:48:31,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 23:48:31,192 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 30 [2020-12-22 23:48:31,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:48:31,193 INFO L225 Difference]: With dead ends: 87 [2020-12-22 23:48:31,193 INFO L226 Difference]: Without dead ends: 55 [2020-12-22 23:48:31,194 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-22 23:48:31,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-12-22 23:48:31,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 51. [2020-12-22 23:48:31,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-12-22 23:48:31,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 64 transitions. [2020-12-22 23:48:31,200 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 64 transitions. Word has length 30 [2020-12-22 23:48:31,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:48:31,200 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 64 transitions. [2020-12-22 23:48:31,201 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 23:48:31,201 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 64 transitions. [2020-12-22 23:48:31,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-12-22 23:48:31,202 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:48:31,202 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:48:31,410 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:48:31,411 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:48:31,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:48:31,412 INFO L82 PathProgramCache]: Analyzing trace with hash -1288504596, now seen corresponding path program 6 times [2020-12-22 23:48:31,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:48:31,413 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350011360] [2020-12-22 23:48:31,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:48:31,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:31,553 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-12-22 23:48:31,554 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350011360] [2020-12-22 23:48:31,554 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [334812479] [2020-12-22 23:48:31,554 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 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 [2020-12-22 23:48:31,645 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-12-22 23:48:31,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:48:31,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-22 23:48:31,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:48:31,698 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-12-22 23:48:31,699 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:48:31,699 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 9 [2020-12-22 23:48:31,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297244461] [2020-12-22 23:48:31,700 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 23:48:31,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:48:31,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 23:48:31,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-22 23:48:31,701 INFO L87 Difference]: Start difference. First operand 51 states and 64 transitions. Second operand 9 states. [2020-12-22 23:48:31,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:48:31,789 INFO L93 Difference]: Finished difference Result 97 states and 128 transitions. [2020-12-22 23:48:31,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 23:48:31,789 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 35 [2020-12-22 23:48:31,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:48:31,790 INFO L225 Difference]: With dead ends: 97 [2020-12-22 23:48:31,790 INFO L226 Difference]: Without dead ends: 61 [2020-12-22 23:48:31,791 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-22 23:48:31,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-12-22 23:48:31,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 57. [2020-12-22 23:48:31,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-12-22 23:48:31,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 72 transitions. [2020-12-22 23:48:31,798 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 72 transitions. Word has length 35 [2020-12-22 23:48:31,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:48:31,799 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 72 transitions. [2020-12-22 23:48:31,799 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 23:48:31,799 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 72 transitions. [2020-12-22 23:48:31,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-12-22 23:48:31,800 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:48:31,800 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:48:32,010 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:48:32,011 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:48:32,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:48:32,013 INFO L82 PathProgramCache]: Analyzing trace with hash -1962867620, now seen corresponding path program 7 times [2020-12-22 23:48:32,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:48:32,014 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105329709] [2020-12-22 23:48:32,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:48:32,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:32,112 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-12-22 23:48:32,112 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105329709] [2020-12-22 23:48:32,113 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [15813773] [2020-12-22 23:48:32,113 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 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 [2020-12-22 23:48:32,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:32,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-22 23:48:32,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:48:32,268 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-12-22 23:48:32,268 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:48:32,269 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-12-22 23:48:32,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371180381] [2020-12-22 23:48:32,274 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-22 23:48:32,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:48:32,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-22 23:48:32,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-22 23:48:32,276 INFO L87 Difference]: Start difference. First operand 57 states and 72 transitions. Second operand 11 states. [2020-12-22 23:48:32,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:48:32,375 INFO L93 Difference]: Finished difference Result 107 states and 142 transitions. [2020-12-22 23:48:32,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 23:48:32,376 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 40 [2020-12-22 23:48:32,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:48:32,376 INFO L225 Difference]: With dead ends: 107 [2020-12-22 23:48:32,377 INFO L226 Difference]: Without dead ends: 67 [2020-12-22 23:48:32,378 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-22 23:48:32,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-12-22 23:48:32,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 63. [2020-12-22 23:48:32,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-12-22 23:48:32,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 80 transitions. [2020-12-22 23:48:32,384 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 80 transitions. Word has length 40 [2020-12-22 23:48:32,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:48:32,385 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 80 transitions. [2020-12-22 23:48:32,385 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-22 23:48:32,385 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 80 transitions. [2020-12-22 23:48:32,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-12-22 23:48:32,386 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:48:32,387 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:48:32,601 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-12-22 23:48:32,602 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:48:32,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:48:32,603 INFO L82 PathProgramCache]: Analyzing trace with hash -801497304, now seen corresponding path program 8 times [2020-12-22 23:48:32,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:48:32,604 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163503655] [2020-12-22 23:48:32,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:48:32,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:32,717 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2020-12-22 23:48:32,717 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163503655] [2020-12-22 23:48:32,718 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465799238] [2020-12-22 23:48:32,718 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:48:32,803 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 23:48:32,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:48:32,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-22 23:48:32,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:48:32,865 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2020-12-22 23:48:32,866 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:48:32,866 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-12-22 23:48:32,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198527822] [2020-12-22 23:48:32,867 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-22 23:48:32,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:48:32,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-22 23:48:32,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-22 23:48:32,868 INFO L87 Difference]: Start difference. First operand 63 states and 80 transitions. Second operand 12 states. [2020-12-22 23:48:32,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:48:32,967 INFO L93 Difference]: Finished difference Result 117 states and 156 transitions. [2020-12-22 23:48:32,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-22 23:48:32,967 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 45 [2020-12-22 23:48:32,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:48:32,968 INFO L225 Difference]: With dead ends: 117 [2020-12-22 23:48:32,968 INFO L226 Difference]: Without dead ends: 73 [2020-12-22 23:48:32,969 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-22 23:48:32,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-12-22 23:48:32,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 69. [2020-12-22 23:48:32,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-12-22 23:48:32,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 88 transitions. [2020-12-22 23:48:32,976 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 88 transitions. Word has length 45 [2020-12-22 23:48:32,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:48:32,977 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 88 transitions. [2020-12-22 23:48:32,977 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-22 23:48:32,977 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 88 transitions. [2020-12-22 23:48:32,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-12-22 23:48:32,978 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:48:32,978 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:48:33,191 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:48:33,192 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:48:33,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:48:33,193 INFO L82 PathProgramCache]: Analyzing trace with hash -1049777120, now seen corresponding path program 9 times [2020-12-22 23:48:33,194 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:48:33,194 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16986961] [2020-12-22 23:48:33,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:48:33,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:33,353 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-12-22 23:48:33,353 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16986961] [2020-12-22 23:48:33,353 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1734452944] [2020-12-22 23:48:33,354 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 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 [2020-12-22 23:48:33,444 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-12-22 23:48:33,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:48:33,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-22 23:48:33,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:48:33,506 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2020-12-22 23:48:33,506 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:48:33,506 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 12 [2020-12-22 23:48:33,507 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783979143] [2020-12-22 23:48:33,508 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-22 23:48:33,508 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:48:33,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-22 23:48:33,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-22 23:48:33,509 INFO L87 Difference]: Start difference. First operand 69 states and 88 transitions. Second operand 12 states. [2020-12-22 23:48:33,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:48:33,630 INFO L93 Difference]: Finished difference Result 127 states and 170 transitions. [2020-12-22 23:48:33,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-22 23:48:33,630 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 50 [2020-12-22 23:48:33,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:48:33,631 INFO L225 Difference]: With dead ends: 127 [2020-12-22 23:48:33,631 INFO L226 Difference]: Without dead ends: 79 [2020-12-22 23:48:33,632 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-22 23:48:33,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-12-22 23:48:33,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 75. [2020-12-22 23:48:33,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-12-22 23:48:33,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 96 transitions. [2020-12-22 23:48:33,639 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 96 transitions. Word has length 50 [2020-12-22 23:48:33,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:48:33,640 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 96 transitions. [2020-12-22 23:48:33,640 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-22 23:48:33,640 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 96 transitions. [2020-12-22 23:48:33,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-12-22 23:48:33,641 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:48:33,641 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:48:33,855 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:48:33,856 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:48:33,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:48:33,857 INFO L82 PathProgramCache]: Analyzing trace with hash -306341020, now seen corresponding path program 10 times [2020-12-22 23:48:33,858 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:48:33,858 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496436903] [2020-12-22 23:48:33,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:48:33,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:34,018 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2020-12-22 23:48:34,019 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496436903] [2020-12-22 23:48:34,019 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1215083734] [2020-12-22 23:48:34,019 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 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 [2020-12-22 23:48:34,094 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 23:48:34,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:48:34,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-22 23:48:34,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:48:34,185 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2020-12-22 23:48:34,186 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:48:34,186 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-12-22 23:48:34,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521852571] [2020-12-22 23:48:34,187 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-22 23:48:34,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:48:34,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-22 23:48:34,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-12-22 23:48:34,188 INFO L87 Difference]: Start difference. First operand 75 states and 96 transitions. Second operand 14 states. [2020-12-22 23:48:34,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:48:34,303 INFO L93 Difference]: Finished difference Result 137 states and 184 transitions. [2020-12-22 23:48:34,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-22 23:48:34,304 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 55 [2020-12-22 23:48:34,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:48:34,305 INFO L225 Difference]: With dead ends: 137 [2020-12-22 23:48:34,305 INFO L226 Difference]: Without dead ends: 85 [2020-12-22 23:48:34,306 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-12-22 23:48:34,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-12-22 23:48:34,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 81. [2020-12-22 23:48:34,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-12-22 23:48:34,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 104 transitions. [2020-12-22 23:48:34,319 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 104 transitions. Word has length 55 [2020-12-22 23:48:34,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:48:34,320 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 104 transitions. [2020-12-22 23:48:34,320 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-22 23:48:34,320 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 104 transitions. [2020-12-22 23:48:34,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-12-22 23:48:34,326 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:48:34,326 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:48:34,539 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-12-22 23:48:34,540 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:48:34,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:48:34,541 INFO L82 PathProgramCache]: Analyzing trace with hash -235529244, now seen corresponding path program 11 times [2020-12-22 23:48:34,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:48:34,542 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504827643] [2020-12-22 23:48:34,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:48:34,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:34,723 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2020-12-22 23:48:34,724 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504827643] [2020-12-22 23:48:34,724 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2112759251] [2020-12-22 23:48:34,724 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 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 [2020-12-22 23:48:34,897 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-12-22 23:48:34,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:48:34,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-22 23:48:34,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:48:34,979 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2020-12-22 23:48:34,979 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:48:34,980 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 14 [2020-12-22 23:48:34,980 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456398651] [2020-12-22 23:48:34,980 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-22 23:48:34,981 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:48:34,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-22 23:48:34,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-12-22 23:48:34,982 INFO L87 Difference]: Start difference. First operand 81 states and 104 transitions. Second operand 14 states. [2020-12-22 23:48:35,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:48:35,105 INFO L93 Difference]: Finished difference Result 147 states and 198 transitions. [2020-12-22 23:48:35,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-22 23:48:35,106 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 60 [2020-12-22 23:48:35,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:48:35,107 INFO L225 Difference]: With dead ends: 147 [2020-12-22 23:48:35,107 INFO L226 Difference]: Without dead ends: 91 [2020-12-22 23:48:35,108 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-12-22 23:48:35,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-12-22 23:48:35,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 87. [2020-12-22 23:48:35,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-12-22 23:48:35,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 112 transitions. [2020-12-22 23:48:35,114 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 112 transitions. Word has length 60 [2020-12-22 23:48:35,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:48:35,114 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 112 transitions. [2020-12-22 23:48:35,115 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-22 23:48:35,115 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 112 transitions. [2020-12-22 23:48:35,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-12-22 23:48:35,115 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:48:35,116 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:48:35,328 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-12-22 23:48:35,329 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:48:35,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:48:35,330 INFO L82 PathProgramCache]: Analyzing trace with hash -1886572640, now seen corresponding path program 12 times [2020-12-22 23:48:35,330 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:48:35,331 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488076170] [2020-12-22 23:48:35,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:48:35,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:35,520 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2020-12-22 23:48:35,520 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488076170] [2020-12-22 23:48:35,520 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [175837827] [2020-12-22 23:48:35,521 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 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 [2020-12-22 23:48:35,757 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-12-22 23:48:35,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:48:35,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-22 23:48:35,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:48:35,842 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2020-12-22 23:48:35,843 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:48:35,843 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 15 [2020-12-22 23:48:35,843 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058834932] [2020-12-22 23:48:35,844 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-22 23:48:35,844 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:48:35,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-22 23:48:35,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-12-22 23:48:35,845 INFO L87 Difference]: Start difference. First operand 87 states and 112 transitions. Second operand 15 states. [2020-12-22 23:48:35,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:48:35,995 INFO L93 Difference]: Finished difference Result 157 states and 212 transitions. [2020-12-22 23:48:35,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-22 23:48:35,995 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 65 [2020-12-22 23:48:35,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:48:35,998 INFO L225 Difference]: With dead ends: 157 [2020-12-22 23:48:35,998 INFO L226 Difference]: Without dead ends: 97 [2020-12-22 23:48:35,999 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-12-22 23:48:36,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-12-22 23:48:36,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 93. [2020-12-22 23:48:36,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-12-22 23:48:36,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 120 transitions. [2020-12-22 23:48:36,013 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 120 transitions. Word has length 65 [2020-12-22 23:48:36,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:48:36,013 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 120 transitions. [2020-12-22 23:48:36,013 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-22 23:48:36,014 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 120 transitions. [2020-12-22 23:48:36,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-12-22 23:48:36,015 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:48:36,015 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:48:36,230 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-22 23:48:36,231 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:48:36,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:48:36,232 INFO L82 PathProgramCache]: Analyzing trace with hash -817196120, now seen corresponding path program 13 times [2020-12-22 23:48:36,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:48:36,233 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72344954] [2020-12-22 23:48:36,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:48:36,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:36,401 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2020-12-22 23:48:36,402 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72344954] [2020-12-22 23:48:36,402 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1264286207] [2020-12-22 23:48:36,402 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 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 [2020-12-22 23:48:36,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:36,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-22 23:48:36,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:48:36,542 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2020-12-22 23:48:36,542 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:48:36,543 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-12-22 23:48:36,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322689640] [2020-12-22 23:48:36,543 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 23:48:36,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:48:36,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 23:48:36,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-12-22 23:48:36,545 INFO L87 Difference]: Start difference. First operand 93 states and 120 transitions. Second operand 17 states. [2020-12-22 23:48:36,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:48:36,681 INFO L93 Difference]: Finished difference Result 167 states and 226 transitions. [2020-12-22 23:48:36,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-22 23:48:36,681 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 70 [2020-12-22 23:48:36,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:48:36,682 INFO L225 Difference]: With dead ends: 167 [2020-12-22 23:48:36,682 INFO L226 Difference]: Without dead ends: 103 [2020-12-22 23:48:36,683 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-12-22 23:48:36,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-12-22 23:48:36,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 99. [2020-12-22 23:48:36,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-12-22 23:48:36,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 128 transitions. [2020-12-22 23:48:36,688 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 128 transitions. Word has length 70 [2020-12-22 23:48:36,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:48:36,689 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 128 transitions. [2020-12-22 23:48:36,689 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 23:48:36,689 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 128 transitions. [2020-12-22 23:48:36,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-12-22 23:48:36,690 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:48:36,690 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:48:36,904 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:48:36,905 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:48:36,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:48:36,906 INFO L82 PathProgramCache]: Analyzing trace with hash -75981860, now seen corresponding path program 14 times [2020-12-22 23:48:36,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:48:36,906 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002696903] [2020-12-22 23:48:36,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:48:36,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:37,076 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2020-12-22 23:48:37,077 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002696903] [2020-12-22 23:48:37,077 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1577631140] [2020-12-22 23:48:37,077 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 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 [2020-12-22 23:48:37,149 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 23:48:37,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:48:37,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-22 23:48:37,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:48:37,237 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2020-12-22 23:48:37,238 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:48:37,238 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-12-22 23:48:37,238 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837708882] [2020-12-22 23:48:37,239 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-22 23:48:37,239 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:48:37,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-22 23:48:37,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-12-22 23:48:37,242 INFO L87 Difference]: Start difference. First operand 99 states and 128 transitions. Second operand 18 states. [2020-12-22 23:48:37,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:48:37,392 INFO L93 Difference]: Finished difference Result 177 states and 240 transitions. [2020-12-22 23:48:37,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-22 23:48:37,392 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 75 [2020-12-22 23:48:37,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:48:37,393 INFO L225 Difference]: With dead ends: 177 [2020-12-22 23:48:37,393 INFO L226 Difference]: Without dead ends: 109 [2020-12-22 23:48:37,394 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-12-22 23:48:37,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-12-22 23:48:37,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 105. [2020-12-22 23:48:37,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-12-22 23:48:37,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 136 transitions. [2020-12-22 23:48:37,400 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 136 transitions. Word has length 75 [2020-12-22 23:48:37,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:48:37,400 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 136 transitions. [2020-12-22 23:48:37,400 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-22 23:48:37,400 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 136 transitions. [2020-12-22 23:48:37,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-12-22 23:48:37,401 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:48:37,401 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:48:37,615 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-12-22 23:48:37,616 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:48:37,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:48:37,617 INFO L82 PathProgramCache]: Analyzing trace with hash -333753492, now seen corresponding path program 15 times [2020-12-22 23:48:37,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:48:37,617 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179528963] [2020-12-22 23:48:37,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:48:37,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:37,796 INFO L134 CoverageAnalysis]: Checked inductivity of 472 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2020-12-22 23:48:37,797 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179528963] [2020-12-22 23:48:37,797 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1592148970] [2020-12-22 23:48:37,797 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 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 [2020-12-22 23:48:38,077 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2020-12-22 23:48:38,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:48:38,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-22 23:48:38,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:48:38,172 INFO L134 CoverageAnalysis]: Checked inductivity of 472 backedges. 0 proven. 247 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2020-12-22 23:48:38,173 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:48:38,173 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 18 [2020-12-22 23:48:38,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832288718] [2020-12-22 23:48:38,173 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-22 23:48:38,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:48:38,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-22 23:48:38,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-12-22 23:48:38,175 INFO L87 Difference]: Start difference. First operand 105 states and 136 transitions. Second operand 18 states. [2020-12-22 23:48:38,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:48:38,333 INFO L93 Difference]: Finished difference Result 187 states and 254 transitions. [2020-12-22 23:48:38,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-22 23:48:38,334 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 80 [2020-12-22 23:48:38,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:48:38,335 INFO L225 Difference]: With dead ends: 187 [2020-12-22 23:48:38,335 INFO L226 Difference]: Without dead ends: 115 [2020-12-22 23:48:38,336 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-12-22 23:48:38,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-12-22 23:48:38,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 111. [2020-12-22 23:48:38,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-12-22 23:48:38,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 144 transitions. [2020-12-22 23:48:38,341 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 144 transitions. Word has length 80 [2020-12-22 23:48:38,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:48:38,342 INFO L481 AbstractCegarLoop]: Abstraction has 111 states and 144 transitions. [2020-12-22 23:48:38,342 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-22 23:48:38,342 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 144 transitions. [2020-12-22 23:48:38,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-12-22 23:48:38,343 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:48:38,343 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:48:38,556 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-22 23:48:38,557 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:48:38,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:48:38,557 INFO L82 PathProgramCache]: Analyzing trace with hash -179331048, now seen corresponding path program 16 times [2020-12-22 23:48:38,558 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:48:38,558 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740881558] [2020-12-22 23:48:38,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:48:38,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:38,757 INFO L134 CoverageAnalysis]: Checked inductivity of 543 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2020-12-22 23:48:38,757 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740881558] [2020-12-22 23:48:38,757 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1371100339] [2020-12-22 23:48:38,757 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 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 [2020-12-22 23:48:38,845 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 23:48:38,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:48:38,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-22 23:48:38,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:48:38,952 INFO L134 CoverageAnalysis]: Checked inductivity of 543 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2020-12-22 23:48:38,953 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:48:38,953 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-12-22 23:48:38,953 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141903652] [2020-12-22 23:48:38,953 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-22 23:48:38,954 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:48:38,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-22 23:48:38,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-12-22 23:48:38,955 INFO L87 Difference]: Start difference. First operand 111 states and 144 transitions. Second operand 20 states. [2020-12-22 23:48:39,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:48:39,120 INFO L93 Difference]: Finished difference Result 197 states and 268 transitions. [2020-12-22 23:48:39,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-22 23:48:39,121 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 85 [2020-12-22 23:48:39,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:48:39,122 INFO L225 Difference]: With dead ends: 197 [2020-12-22 23:48:39,122 INFO L226 Difference]: Without dead ends: 121 [2020-12-22 23:48:39,122 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-12-22 23:48:39,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-12-22 23:48:39,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 117. [2020-12-22 23:48:39,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-12-22 23:48:39,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 152 transitions. [2020-12-22 23:48:39,127 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 152 transitions. Word has length 85 [2020-12-22 23:48:39,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:48:39,127 INFO L481 AbstractCegarLoop]: Abstraction has 117 states and 152 transitions. [2020-12-22 23:48:39,127 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-22 23:48:39,128 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 152 transitions. [2020-12-22 23:48:39,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-12-22 23:48:39,128 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:48:39,129 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:48:39,341 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-22 23:48:39,342 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:48:39,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:48:39,342 INFO L82 PathProgramCache]: Analyzing trace with hash -15164624, now seen corresponding path program 17 times [2020-12-22 23:48:39,343 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:48:39,343 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317798093] [2020-12-22 23:48:39,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:48:39,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:39,577 INFO L134 CoverageAnalysis]: Checked inductivity of 619 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2020-12-22 23:48:39,577 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317798093] [2020-12-22 23:48:39,578 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1322865249] [2020-12-22 23:48:39,578 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 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 [2020-12-22 23:48:40,245 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2020-12-22 23:48:40,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:48:40,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-22 23:48:40,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:48:40,373 INFO L134 CoverageAnalysis]: Checked inductivity of 619 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2020-12-22 23:48:40,373 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:48:40,374 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-12-22 23:48:40,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612808508] [2020-12-22 23:48:40,374 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-22 23:48:40,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:48:40,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-22 23:48:40,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-12-22 23:48:40,376 INFO L87 Difference]: Start difference. First operand 117 states and 152 transitions. Second operand 21 states. [2020-12-22 23:48:40,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:48:40,595 INFO L93 Difference]: Finished difference Result 207 states and 282 transitions. [2020-12-22 23:48:40,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-22 23:48:40,596 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 90 [2020-12-22 23:48:40,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:48:40,598 INFO L225 Difference]: With dead ends: 207 [2020-12-22 23:48:40,598 INFO L226 Difference]: Without dead ends: 127 [2020-12-22 23:48:40,599 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-12-22 23:48:40,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-12-22 23:48:40,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 123. [2020-12-22 23:48:40,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-12-22 23:48:40,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 160 transitions. [2020-12-22 23:48:40,605 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 160 transitions. Word has length 90 [2020-12-22 23:48:40,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:48:40,606 INFO L481 AbstractCegarLoop]: Abstraction has 123 states and 160 transitions. [2020-12-22 23:48:40,606 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-22 23:48:40,606 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 160 transitions. [2020-12-22 23:48:40,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-12-22 23:48:40,607 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:48:40,608 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:48:40,821 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:48:40,822 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:48:40,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:48:40,823 INFO L82 PathProgramCache]: Analyzing trace with hash 2061630548, now seen corresponding path program 18 times [2020-12-22 23:48:40,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:48:40,824 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323041101] [2020-12-22 23:48:40,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:48:40,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:41,106 INFO L134 CoverageAnalysis]: Checked inductivity of 700 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2020-12-22 23:48:41,106 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323041101] [2020-12-22 23:48:41,106 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1836572295] [2020-12-22 23:48:41,106 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 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 [2020-12-22 23:48:42,141 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2020-12-22 23:48:42,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:48:42,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-22 23:48:42,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:48:42,236 INFO L134 CoverageAnalysis]: Checked inductivity of 700 backedges. 0 proven. 376 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2020-12-22 23:48:42,236 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:48:42,237 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 21 [2020-12-22 23:48:42,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103607829] [2020-12-22 23:48:42,237 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-22 23:48:42,237 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:48:42,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-22 23:48:42,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-12-22 23:48:42,239 INFO L87 Difference]: Start difference. First operand 123 states and 160 transitions. Second operand 21 states. [2020-12-22 23:48:42,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:48:42,481 INFO L93 Difference]: Finished difference Result 217 states and 296 transitions. [2020-12-22 23:48:42,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-22 23:48:42,482 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 95 [2020-12-22 23:48:42,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:48:42,483 INFO L225 Difference]: With dead ends: 217 [2020-12-22 23:48:42,483 INFO L226 Difference]: Without dead ends: 133 [2020-12-22 23:48:42,483 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-12-22 23:48:42,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-12-22 23:48:42,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 129. [2020-12-22 23:48:42,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-12-22 23:48:42,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 168 transitions. [2020-12-22 23:48:42,488 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 168 transitions. Word has length 95 [2020-12-22 23:48:42,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:48:42,489 INFO L481 AbstractCegarLoop]: Abstraction has 129 states and 168 transitions. [2020-12-22 23:48:42,489 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-22 23:48:42,489 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 168 transitions. [2020-12-22 23:48:42,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-12-22 23:48:42,490 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:48:42,490 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:48:42,704 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:48:42,705 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:48:42,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:48:42,706 INFO L82 PathProgramCache]: Analyzing trace with hash 653437684, now seen corresponding path program 19 times [2020-12-22 23:48:42,706 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:48:42,706 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327969726] [2020-12-22 23:48:42,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:48:42,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:42,961 INFO L134 CoverageAnalysis]: Checked inductivity of 786 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 425 trivial. 0 not checked. [2020-12-22 23:48:42,961 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327969726] [2020-12-22 23:48:42,961 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1254150842] [2020-12-22 23:48:42,961 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 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 [2020-12-22 23:48:43,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:43,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-22 23:48:43,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:48:43,165 INFO L134 CoverageAnalysis]: Checked inductivity of 786 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 425 trivial. 0 not checked. [2020-12-22 23:48:43,165 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:48:43,165 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-12-22 23:48:43,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129582392] [2020-12-22 23:48:43,169 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-22 23:48:43,169 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:48:43,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-22 23:48:43,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-12-22 23:48:43,170 INFO L87 Difference]: Start difference. First operand 129 states and 168 transitions. Second operand 23 states. [2020-12-22 23:48:43,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:48:43,407 INFO L93 Difference]: Finished difference Result 227 states and 310 transitions. [2020-12-22 23:48:43,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-22 23:48:43,407 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 100 [2020-12-22 23:48:43,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:48:43,408 INFO L225 Difference]: With dead ends: 227 [2020-12-22 23:48:43,408 INFO L226 Difference]: Without dead ends: 139 [2020-12-22 23:48:43,409 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-12-22 23:48:43,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-12-22 23:48:43,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 135. [2020-12-22 23:48:43,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2020-12-22 23:48:43,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 176 transitions. [2020-12-22 23:48:43,414 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 176 transitions. Word has length 100 [2020-12-22 23:48:43,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:48:43,414 INFO L481 AbstractCegarLoop]: Abstraction has 135 states and 176 transitions. [2020-12-22 23:48:43,414 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-22 23:48:43,414 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 176 transitions. [2020-12-22 23:48:43,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-12-22 23:48:43,415 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:48:43,416 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:48:43,630 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-12-22 23:48:43,630 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:48:43,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:48:43,631 INFO L82 PathProgramCache]: Analyzing trace with hash 2147446928, now seen corresponding path program 20 times [2020-12-22 23:48:43,631 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:48:43,631 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621179682] [2020-12-22 23:48:43,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:48:43,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:43,903 INFO L134 CoverageAnalysis]: Checked inductivity of 877 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 477 trivial. 0 not checked. [2020-12-22 23:48:43,903 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621179682] [2020-12-22 23:48:43,903 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [981208862] [2020-12-22 23:48:43,903 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:48:44,000 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 23:48:44,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:48:44,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 362 conjuncts, 22 conjunts are in the unsatisfiable core [2020-12-22 23:48:44,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:48:44,101 INFO L134 CoverageAnalysis]: Checked inductivity of 877 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 477 trivial. 0 not checked. [2020-12-22 23:48:44,102 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:48:44,102 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-12-22 23:48:44,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426250097] [2020-12-22 23:48:44,103 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-12-22 23:48:44,103 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:48:44,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-12-22 23:48:44,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2020-12-22 23:48:44,104 INFO L87 Difference]: Start difference. First operand 135 states and 176 transitions. Second operand 24 states. [2020-12-22 23:48:44,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:48:44,362 INFO L93 Difference]: Finished difference Result 237 states and 324 transitions. [2020-12-22 23:48:44,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-12-22 23:48:44,364 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 105 [2020-12-22 23:48:44,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:48:44,366 INFO L225 Difference]: With dead ends: 237 [2020-12-22 23:48:44,366 INFO L226 Difference]: Without dead ends: 145 [2020-12-22 23:48:44,367 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2020-12-22 23:48:44,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-12-22 23:48:44,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 141. [2020-12-22 23:48:44,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-12-22 23:48:44,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 184 transitions. [2020-12-22 23:48:44,372 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 184 transitions. Word has length 105 [2020-12-22 23:48:44,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:48:44,372 INFO L481 AbstractCegarLoop]: Abstraction has 141 states and 184 transitions. [2020-12-22 23:48:44,373 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-12-22 23:48:44,373 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 184 transitions. [2020-12-22 23:48:44,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-12-22 23:48:44,374 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:48:44,374 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:48:44,587 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-12-22 23:48:44,588 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:48:44,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:48:44,589 INFO L82 PathProgramCache]: Analyzing trace with hash 777634488, now seen corresponding path program 21 times [2020-12-22 23:48:44,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:48:44,589 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213170189] [2020-12-22 23:48:44,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:48:44,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:44,889 INFO L134 CoverageAnalysis]: Checked inductivity of 973 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2020-12-22 23:48:44,890 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213170189] [2020-12-22 23:48:44,890 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2055894662] [2020-12-22 23:48:44,890 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 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 [2020-12-22 23:48:45,382 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 20 check-sat command(s) [2020-12-22 23:48:45,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:48:45,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 366 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-22 23:48:45,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:48:45,481 INFO L134 CoverageAnalysis]: Checked inductivity of 973 backedges. 0 proven. 532 refuted. 0 times theorem prover too weak. 441 trivial. 0 not checked. [2020-12-22 23:48:45,481 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:48:45,482 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 22] total 24 [2020-12-22 23:48:45,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822629329] [2020-12-22 23:48:45,482 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-12-22 23:48:45,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:48:45,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-12-22 23:48:45,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2020-12-22 23:48:45,483 INFO L87 Difference]: Start difference. First operand 141 states and 184 transitions. Second operand 24 states. [2020-12-22 23:48:45,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:48:45,740 INFO L93 Difference]: Finished difference Result 247 states and 338 transitions. [2020-12-22 23:48:45,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-22 23:48:45,740 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 110 [2020-12-22 23:48:45,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:48:45,741 INFO L225 Difference]: With dead ends: 247 [2020-12-22 23:48:45,742 INFO L226 Difference]: Without dead ends: 151 [2020-12-22 23:48:45,742 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2020-12-22 23:48:45,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-12-22 23:48:45,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 147. [2020-12-22 23:48:45,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-12-22 23:48:45,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 192 transitions. [2020-12-22 23:48:45,748 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 192 transitions. Word has length 110 [2020-12-22 23:48:45,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:48:45,749 INFO L481 AbstractCegarLoop]: Abstraction has 147 states and 192 transitions. [2020-12-22 23:48:45,749 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-12-22 23:48:45,749 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 192 transitions. [2020-12-22 23:48:45,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-12-22 23:48:45,750 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:48:45,750 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:48:45,963 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:48:45,964 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:48:45,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:48:45,965 INFO L82 PathProgramCache]: Analyzing trace with hash -1434993460, now seen corresponding path program 22 times [2020-12-22 23:48:45,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:48:45,966 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85409077] [2020-12-22 23:48:45,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:48:45,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:46,352 INFO L134 CoverageAnalysis]: Checked inductivity of 1074 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 590 trivial. 0 not checked. [2020-12-22 23:48:46,352 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85409077] [2020-12-22 23:48:46,352 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405582114] [2020-12-22 23:48:46,352 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 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 [2020-12-22 23:48:46,453 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 23:48:46,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:48:46,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 394 conjuncts, 24 conjunts are in the unsatisfiable core [2020-12-22 23:48:46,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:48:46,552 INFO L134 CoverageAnalysis]: Checked inductivity of 1074 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 590 trivial. 0 not checked. [2020-12-22 23:48:46,552 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:48:46,552 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-12-22 23:48:46,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121494631] [2020-12-22 23:48:46,553 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-12-22 23:48:46,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:48:46,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-12-22 23:48:46,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2020-12-22 23:48:46,554 INFO L87 Difference]: Start difference. First operand 147 states and 192 transitions. Second operand 26 states. [2020-12-22 23:48:46,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:48:46,817 INFO L93 Difference]: Finished difference Result 257 states and 352 transitions. [2020-12-22 23:48:46,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-22 23:48:46,818 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 115 [2020-12-22 23:48:46,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:48:46,819 INFO L225 Difference]: With dead ends: 257 [2020-12-22 23:48:46,819 INFO L226 Difference]: Without dead ends: 157 [2020-12-22 23:48:46,819 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2020-12-22 23:48:46,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2020-12-22 23:48:46,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 153. [2020-12-22 23:48:46,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2020-12-22 23:48:46,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 200 transitions. [2020-12-22 23:48:46,824 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 200 transitions. Word has length 115 [2020-12-22 23:48:46,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:48:46,825 INFO L481 AbstractCegarLoop]: Abstraction has 153 states and 200 transitions. [2020-12-22 23:48:46,825 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-12-22 23:48:46,825 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 200 transitions. [2020-12-22 23:48:46,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2020-12-22 23:48:46,826 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:48:46,826 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:48:47,039 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-12-22 23:48:47,040 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:48:47,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:48:47,040 INFO L82 PathProgramCache]: Analyzing trace with hash -805428612, now seen corresponding path program 23 times [2020-12-22 23:48:47,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:48:47,041 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749721842] [2020-12-22 23:48:47,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:48:47,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:47,386 INFO L134 CoverageAnalysis]: Checked inductivity of 1180 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 651 trivial. 0 not checked. [2020-12-22 23:48:47,386 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749721842] [2020-12-22 23:48:47,386 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [785516216] [2020-12-22 23:48:47,386 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 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 [2020-12-22 23:48:48,693 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2020-12-22 23:48:48,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:48:48,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 23 conjunts are in the unsatisfiable core [2020-12-22 23:48:48,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:48:48,814 INFO L134 CoverageAnalysis]: Checked inductivity of 1180 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 529 trivial. 0 not checked. [2020-12-22 23:48:48,815 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:48:48,815 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 24] total 26 [2020-12-22 23:48:48,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152217926] [2020-12-22 23:48:48,816 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-12-22 23:48:48,816 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:48:48,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-12-22 23:48:48,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2020-12-22 23:48:48,817 INFO L87 Difference]: Start difference. First operand 153 states and 200 transitions. Second operand 26 states. [2020-12-22 23:48:49,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:48:49,070 INFO L93 Difference]: Finished difference Result 267 states and 366 transitions. [2020-12-22 23:48:49,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-22 23:48:49,070 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 120 [2020-12-22 23:48:49,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:48:49,072 INFO L225 Difference]: With dead ends: 267 [2020-12-22 23:48:49,072 INFO L226 Difference]: Without dead ends: 163 [2020-12-22 23:48:49,073 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2020-12-22 23:48:49,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-12-22 23:48:49,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 159. [2020-12-22 23:48:49,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-12-22 23:48:49,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 208 transitions. [2020-12-22 23:48:49,079 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 208 transitions. Word has length 120 [2020-12-22 23:48:49,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:48:49,079 INFO L481 AbstractCegarLoop]: Abstraction has 159 states and 208 transitions. [2020-12-22 23:48:49,079 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-12-22 23:48:49,079 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 208 transitions. [2020-12-22 23:48:49,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2020-12-22 23:48:49,080 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:48:49,080 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:48:49,294 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:48:49,295 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:48:49,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:48:49,296 INFO L82 PathProgramCache]: Analyzing trace with hash 236626184, now seen corresponding path program 24 times [2020-12-22 23:48:49,296 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:48:49,296 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669261088] [2020-12-22 23:48:49,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:48:49,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:49,677 INFO L134 CoverageAnalysis]: Checked inductivity of 1291 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2020-12-22 23:48:49,677 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669261088] [2020-12-22 23:48:49,677 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1352114435] [2020-12-22 23:48:49,677 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 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 [2020-12-22 23:48:52,039 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2020-12-22 23:48:52,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:48:52,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 426 conjuncts, 24 conjunts are in the unsatisfiable core [2020-12-22 23:48:52,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:48:52,171 INFO L134 CoverageAnalysis]: Checked inductivity of 1291 backedges. 0 proven. 715 refuted. 0 times theorem prover too weak. 576 trivial. 0 not checked. [2020-12-22 23:48:52,172 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:48:52,172 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 25] total 27 [2020-12-22 23:48:52,172 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550379884] [2020-12-22 23:48:52,173 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-12-22 23:48:52,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:48:52,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-12-22 23:48:52,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2020-12-22 23:48:52,174 INFO L87 Difference]: Start difference. First operand 159 states and 208 transitions. Second operand 27 states. [2020-12-22 23:48:52,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:48:52,445 INFO L93 Difference]: Finished difference Result 277 states and 380 transitions. [2020-12-22 23:48:52,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-12-22 23:48:52,446 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 125 [2020-12-22 23:48:52,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:48:52,447 INFO L225 Difference]: With dead ends: 277 [2020-12-22 23:48:52,447 INFO L226 Difference]: Without dead ends: 169 [2020-12-22 23:48:52,448 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2020-12-22 23:48:52,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2020-12-22 23:48:52,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 165. [2020-12-22 23:48:52,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-12-22 23:48:52,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 216 transitions. [2020-12-22 23:48:52,454 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 216 transitions. Word has length 125 [2020-12-22 23:48:52,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:48:52,455 INFO L481 AbstractCegarLoop]: Abstraction has 165 states and 216 transitions. [2020-12-22 23:48:52,455 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-12-22 23:48:52,455 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 216 transitions. [2020-12-22 23:48:52,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-12-22 23:48:52,456 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:48:52,456 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:48:52,671 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-12-22 23:48:52,672 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:48:52,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:48:52,672 INFO L82 PathProgramCache]: Analyzing trace with hash -91223488, now seen corresponding path program 25 times [2020-12-22 23:48:52,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:48:52,673 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301862427] [2020-12-22 23:48:52,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:48:52,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:53,093 INFO L134 CoverageAnalysis]: Checked inductivity of 1407 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 782 trivial. 0 not checked. [2020-12-22 23:48:53,094 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301862427] [2020-12-22 23:48:53,094 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [783089521] [2020-12-22 23:48:53,094 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 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 [2020-12-22 23:48:53,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:53,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 442 conjuncts, 27 conjunts are in the unsatisfiable core [2020-12-22 23:48:53,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:48:53,321 INFO L134 CoverageAnalysis]: Checked inductivity of 1407 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 782 trivial. 0 not checked. [2020-12-22 23:48:53,321 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:48:53,321 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2020-12-22 23:48:53,322 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147564461] [2020-12-22 23:48:53,322 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-12-22 23:48:53,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:48:53,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-12-22 23:48:53,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2020-12-22 23:48:53,323 INFO L87 Difference]: Start difference. First operand 165 states and 216 transitions. Second operand 29 states. [2020-12-22 23:48:53,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:48:53,621 INFO L93 Difference]: Finished difference Result 287 states and 394 transitions. [2020-12-22 23:48:53,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-12-22 23:48:53,622 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 130 [2020-12-22 23:48:53,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:48:53,623 INFO L225 Difference]: With dead ends: 287 [2020-12-22 23:48:53,623 INFO L226 Difference]: Without dead ends: 175 [2020-12-22 23:48:53,624 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2020-12-22 23:48:53,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2020-12-22 23:48:53,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 171. [2020-12-22 23:48:53,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2020-12-22 23:48:53,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 224 transitions. [2020-12-22 23:48:53,629 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 224 transitions. Word has length 130 [2020-12-22 23:48:53,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:48:53,630 INFO L481 AbstractCegarLoop]: Abstraction has 171 states and 224 transitions. [2020-12-22 23:48:53,630 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-12-22 23:48:53,630 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 224 transitions. [2020-12-22 23:48:53,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-12-22 23:48:53,631 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:48:53,631 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:48:53,845 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-12-22 23:48:53,846 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:48:53,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:48:53,846 INFO L82 PathProgramCache]: Analyzing trace with hash -390603452, now seen corresponding path program 26 times [2020-12-22 23:48:53,847 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:48:53,847 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766391139] [2020-12-22 23:48:53,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:48:53,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:54,300 INFO L134 CoverageAnalysis]: Checked inductivity of 1528 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 852 trivial. 0 not checked. [2020-12-22 23:48:54,301 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766391139] [2020-12-22 23:48:54,301 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1534025296] [2020-12-22 23:48:54,301 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:48:54,415 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 23:48:54,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:48:54,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 28 conjunts are in the unsatisfiable core [2020-12-22 23:48:54,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:48:54,549 INFO L134 CoverageAnalysis]: Checked inductivity of 1528 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 852 trivial. 0 not checked. [2020-12-22 23:48:54,549 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:48:54,550 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2020-12-22 23:48:54,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784581002] [2020-12-22 23:48:54,550 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-12-22 23:48:54,550 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:48:54,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-12-22 23:48:54,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2020-12-22 23:48:54,552 INFO L87 Difference]: Start difference. First operand 171 states and 224 transitions. Second operand 30 states. [2020-12-22 23:48:54,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:48:54,852 INFO L93 Difference]: Finished difference Result 297 states and 408 transitions. [2020-12-22 23:48:54,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-12-22 23:48:54,852 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 135 [2020-12-22 23:48:54,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:48:54,855 INFO L225 Difference]: With dead ends: 297 [2020-12-22 23:48:54,855 INFO L226 Difference]: Without dead ends: 181 [2020-12-22 23:48:54,857 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2020-12-22 23:48:54,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2020-12-22 23:48:54,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 177. [2020-12-22 23:48:54,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2020-12-22 23:48:54,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 232 transitions. [2020-12-22 23:48:54,864 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 232 transitions. Word has length 135 [2020-12-22 23:48:54,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:48:54,865 INFO L481 AbstractCegarLoop]: Abstraction has 177 states and 232 transitions. [2020-12-22 23:48:54,865 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-12-22 23:48:54,865 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 232 transitions. [2020-12-22 23:48:54,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2020-12-22 23:48:54,866 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:48:54,866 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:48:55,079 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-12-22 23:48:55,080 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:48:55,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:48:55,080 INFO L82 PathProgramCache]: Analyzing trace with hash 348109316, now seen corresponding path program 27 times [2020-12-22 23:48:55,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:48:55,081 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867952753] [2020-12-22 23:48:55,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:48:55,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:55,544 INFO L134 CoverageAnalysis]: Checked inductivity of 1654 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 925 trivial. 0 not checked. [2020-12-22 23:48:55,544 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867952753] [2020-12-22 23:48:55,544 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [541660915] [2020-12-22 23:48:55,544 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 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 [2020-12-22 23:48:57,343 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 26 check-sat command(s) [2020-12-22 23:48:57,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:48:57,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 462 conjuncts, 27 conjunts are in the unsatisfiable core [2020-12-22 23:48:57,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:48:57,511 INFO L134 CoverageAnalysis]: Checked inductivity of 1654 backedges. 0 proven. 925 refuted. 0 times theorem prover too weak. 729 trivial. 0 not checked. [2020-12-22 23:48:57,512 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:48:57,512 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 28] total 30 [2020-12-22 23:48:57,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293488395] [2020-12-22 23:48:57,512 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-12-22 23:48:57,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:48:57,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-12-22 23:48:57,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2020-12-22 23:48:57,514 INFO L87 Difference]: Start difference. First operand 177 states and 232 transitions. Second operand 30 states. [2020-12-22 23:48:57,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:48:57,835 INFO L93 Difference]: Finished difference Result 307 states and 422 transitions. [2020-12-22 23:48:57,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-12-22 23:48:57,836 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 140 [2020-12-22 23:48:57,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:48:57,837 INFO L225 Difference]: With dead ends: 307 [2020-12-22 23:48:57,837 INFO L226 Difference]: Without dead ends: 187 [2020-12-22 23:48:57,838 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2020-12-22 23:48:57,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2020-12-22 23:48:57,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 183. [2020-12-22 23:48:57,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2020-12-22 23:48:57,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 240 transitions. [2020-12-22 23:48:57,845 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 240 transitions. Word has length 140 [2020-12-22 23:48:57,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:48:57,845 INFO L481 AbstractCegarLoop]: Abstraction has 183 states and 240 transitions. [2020-12-22 23:48:57,845 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-12-22 23:48:57,845 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 240 transitions. [2020-12-22 23:48:57,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2020-12-22 23:48:57,846 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:48:57,846 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:48:58,059 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-12-22 23:48:58,059 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:48:58,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:48:58,060 INFO L82 PathProgramCache]: Analyzing trace with hash 1579102592, now seen corresponding path program 28 times [2020-12-22 23:48:58,060 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:48:58,060 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108182324] [2020-12-22 23:48:58,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:48:58,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:58,536 INFO L134 CoverageAnalysis]: Checked inductivity of 1785 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 1001 trivial. 0 not checked. [2020-12-22 23:48:58,536 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108182324] [2020-12-22 23:48:58,537 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1934734393] [2020-12-22 23:48:58,537 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 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 [2020-12-22 23:48:58,655 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 23:48:58,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:48:58,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 490 conjuncts, 28 conjunts are in the unsatisfiable core [2020-12-22 23:48:58,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:48:58,784 INFO L134 CoverageAnalysis]: Checked inductivity of 1785 backedges. 0 proven. 1001 refuted. 0 times theorem prover too weak. 784 trivial. 0 not checked. [2020-12-22 23:48:58,785 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:48:58,785 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 29] total 31 [2020-12-22 23:48:58,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719564573] [2020-12-22 23:48:58,786 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-12-22 23:48:58,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:48:58,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-12-22 23:48:58,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2020-12-22 23:48:58,787 INFO L87 Difference]: Start difference. First operand 183 states and 240 transitions. Second operand 31 states. [2020-12-22 23:48:59,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:48:59,104 INFO L93 Difference]: Finished difference Result 317 states and 436 transitions. [2020-12-22 23:48:59,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-12-22 23:48:59,105 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 145 [2020-12-22 23:48:59,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:48:59,106 INFO L225 Difference]: With dead ends: 317 [2020-12-22 23:48:59,106 INFO L226 Difference]: Without dead ends: 193 [2020-12-22 23:48:59,107 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2020-12-22 23:48:59,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2020-12-22 23:48:59,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 189. [2020-12-22 23:48:59,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2020-12-22 23:48:59,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 248 transitions. [2020-12-22 23:48:59,113 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 248 transitions. Word has length 145 [2020-12-22 23:48:59,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:48:59,113 INFO L481 AbstractCegarLoop]: Abstraction has 189 states and 248 transitions. [2020-12-22 23:48:59,113 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-12-22 23:48:59,114 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 248 transitions. [2020-12-22 23:48:59,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2020-12-22 23:48:59,114 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:48:59,115 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:48:59,323 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:48:59,324 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:48:59,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:48:59,325 INFO L82 PathProgramCache]: Analyzing trace with hash 1094545864, now seen corresponding path program 29 times [2020-12-22 23:48:59,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:48:59,325 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522535214] [2020-12-22 23:48:59,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:48:59,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:59,894 INFO L134 CoverageAnalysis]: Checked inductivity of 1921 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 1080 trivial. 0 not checked. [2020-12-22 23:48:59,895 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522535214] [2020-12-22 23:48:59,895 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1616632475] [2020-12-22 23:48:59,895 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 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:49:02,098 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2020-12-22 23:49:02,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:49:02,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 506 conjuncts, 29 conjunts are in the unsatisfiable core [2020-12-22 23:49:02,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:49:02,248 INFO L134 CoverageAnalysis]: Checked inductivity of 1921 backedges. 0 proven. 1080 refuted. 0 times theorem prover too weak. 841 trivial. 0 not checked. [2020-12-22 23:49:02,249 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:49:02,249 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 30] total 32 [2020-12-22 23:49:02,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24469294] [2020-12-22 23:49:02,250 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-12-22 23:49:02,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:49:02,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-12-22 23:49:02,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2020-12-22 23:49:02,251 INFO L87 Difference]: Start difference. First operand 189 states and 248 transitions. Second operand 32 states. [2020-12-22 23:49:02,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:49:02,559 INFO L93 Difference]: Finished difference Result 327 states and 450 transitions. [2020-12-22 23:49:02,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-12-22 23:49:02,560 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 150 [2020-12-22 23:49:02,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:49:02,561 INFO L225 Difference]: With dead ends: 327 [2020-12-22 23:49:02,562 INFO L226 Difference]: Without dead ends: 199 [2020-12-22 23:49:02,562 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2020-12-22 23:49:02,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2020-12-22 23:49:02,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 195. [2020-12-22 23:49:02,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2020-12-22 23:49:02,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 256 transitions. [2020-12-22 23:49:02,568 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 256 transitions. Word has length 150 [2020-12-22 23:49:02,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:49:02,569 INFO L481 AbstractCegarLoop]: Abstraction has 195 states and 256 transitions. [2020-12-22 23:49:02,569 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-12-22 23:49:02,569 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 256 transitions. [2020-12-22 23:49:02,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2020-12-22 23:49:02,570 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:49:02,570 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:49:02,785 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:49:02,786 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:49:02,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:49:02,786 INFO L82 PathProgramCache]: Analyzing trace with hash 874536380, now seen corresponding path program 30 times [2020-12-22 23:49:02,787 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:49:02,787 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694997118] [2020-12-22 23:49:02,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:49:02,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:49:03,363 INFO L134 CoverageAnalysis]: Checked inductivity of 2062 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 1162 trivial. 0 not checked. [2020-12-22 23:49:03,363 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694997118] [2020-12-22 23:49:03,363 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [342970613] [2020-12-22 23:49:03,364 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 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:49:07,606 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2020-12-22 23:49:07,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:49:07,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 522 conjuncts, 30 conjunts are in the unsatisfiable core [2020-12-22 23:49:07,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:49:07,768 INFO L134 CoverageAnalysis]: Checked inductivity of 2062 backedges. 0 proven. 1162 refuted. 0 times theorem prover too weak. 900 trivial. 0 not checked. [2020-12-22 23:49:07,769 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:49:07,769 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 31] total 33 [2020-12-22 23:49:07,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811885446] [2020-12-22 23:49:07,770 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-12-22 23:49:07,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:49:07,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-12-22 23:49:07,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2020-12-22 23:49:07,771 INFO L87 Difference]: Start difference. First operand 195 states and 256 transitions. Second operand 33 states. [2020-12-22 23:49:08,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:49:08,077 INFO L93 Difference]: Finished difference Result 337 states and 464 transitions. [2020-12-22 23:49:08,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-12-22 23:49:08,077 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 155 [2020-12-22 23:49:08,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:49:08,079 INFO L225 Difference]: With dead ends: 337 [2020-12-22 23:49:08,079 INFO L226 Difference]: Without dead ends: 205 [2020-12-22 23:49:08,080 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2020-12-22 23:49:08,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2020-12-22 23:49:08,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 201. [2020-12-22 23:49:08,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 201 states. [2020-12-22 23:49:08,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 264 transitions. [2020-12-22 23:49:08,086 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 264 transitions. Word has length 155 [2020-12-22 23:49:08,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:49:08,087 INFO L481 AbstractCegarLoop]: Abstraction has 201 states and 264 transitions. [2020-12-22 23:49:08,087 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-12-22 23:49:08,087 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 264 transitions. [2020-12-22 23:49:08,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2020-12-22 23:49:08,088 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:49:08,088 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:49:08,302 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:49:08,302 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:49:08,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:49:08,303 INFO L82 PathProgramCache]: Analyzing trace with hash -1564905076, now seen corresponding path program 31 times [2020-12-22 23:49:08,303 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:49:08,303 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669875995] [2020-12-22 23:49:08,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:49:08,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:49:08,922 INFO L134 CoverageAnalysis]: Checked inductivity of 2208 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 1247 trivial. 0 not checked. [2020-12-22 23:49:08,923 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669875995] [2020-12-22 23:49:08,923 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [977151763] [2020-12-22 23:49:08,923 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 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:49:09,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:49:09,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 538 conjuncts, 33 conjunts are in the unsatisfiable core [2020-12-22 23:49:09,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:49:09,204 INFO L134 CoverageAnalysis]: Checked inductivity of 2208 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 1247 trivial. 0 not checked. [2020-12-22 23:49:09,205 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:49:09,205 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2020-12-22 23:49:09,205 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509726315] [2020-12-22 23:49:09,206 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-12-22 23:49:09,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:49:09,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-12-22 23:49:09,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2020-12-22 23:49:09,207 INFO L87 Difference]: Start difference. First operand 201 states and 264 transitions. Second operand 35 states. [2020-12-22 23:49:09,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:49:09,624 INFO L93 Difference]: Finished difference Result 347 states and 478 transitions. [2020-12-22 23:49:09,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-12-22 23:49:09,629 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 160 [2020-12-22 23:49:09,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:49:09,630 INFO L225 Difference]: With dead ends: 347 [2020-12-22 23:49:09,630 INFO L226 Difference]: Without dead ends: 211 [2020-12-22 23:49:09,633 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2020-12-22 23:49:09,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2020-12-22 23:49:09,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 207. [2020-12-22 23:49:09,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 207 states. [2020-12-22 23:49:09,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 272 transitions. [2020-12-22 23:49:09,641 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 272 transitions. Word has length 160 [2020-12-22 23:49:09,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:49:09,642 INFO L481 AbstractCegarLoop]: Abstraction has 207 states and 272 transitions. [2020-12-22 23:49:09,642 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-12-22 23:49:09,642 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 272 transitions. [2020-12-22 23:49:09,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2020-12-22 23:49:09,644 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:49:09,645 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:49:09,858 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2020-12-22 23:49:09,859 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:49:09,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:49:09,860 INFO L82 PathProgramCache]: Analyzing trace with hash -1903484424, now seen corresponding path program 32 times [2020-12-22 23:49:09,860 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:49:09,860 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102233573] [2020-12-22 23:49:09,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:49:09,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:49:10,480 INFO L134 CoverageAnalysis]: Checked inductivity of 2359 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 1335 trivial. 0 not checked. [2020-12-22 23:49:10,480 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102233573] [2020-12-22 23:49:10,480 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1875383603] [2020-12-22 23:49:10,480 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 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:49:10,620 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 23:49:10,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:49:10,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 554 conjuncts, 34 conjunts are in the unsatisfiable core [2020-12-22 23:49:10,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:49:10,758 INFO L134 CoverageAnalysis]: Checked inductivity of 2359 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 1335 trivial. 0 not checked. [2020-12-22 23:49:10,758 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:49:10,758 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2020-12-22 23:49:10,759 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722870622] [2020-12-22 23:49:10,759 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-12-22 23:49:10,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:49:10,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-12-22 23:49:10,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2020-12-22 23:49:10,761 INFO L87 Difference]: Start difference. First operand 207 states and 272 transitions. Second operand 36 states. [2020-12-22 23:49:11,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:49:11,192 INFO L93 Difference]: Finished difference Result 357 states and 492 transitions. [2020-12-22 23:49:11,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-12-22 23:49:11,193 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 165 [2020-12-22 23:49:11,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:49:11,194 INFO L225 Difference]: With dead ends: 357 [2020-12-22 23:49:11,195 INFO L226 Difference]: Without dead ends: 217 [2020-12-22 23:49:11,195 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2020-12-22 23:49:11,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2020-12-22 23:49:11,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 213. [2020-12-22 23:49:11,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 213 states. [2020-12-22 23:49:11,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 280 transitions. [2020-12-22 23:49:11,205 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 280 transitions. Word has length 165 [2020-12-22 23:49:11,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:49:11,205 INFO L481 AbstractCegarLoop]: Abstraction has 213 states and 280 transitions. [2020-12-22 23:49:11,205 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-12-22 23:49:11,205 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 280 transitions. [2020-12-22 23:49:11,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2020-12-22 23:49:11,207 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:49:11,207 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:49:11,420 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:49:11,420 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:49:11,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:49:11,421 INFO L82 PathProgramCache]: Analyzing trace with hash -1612449456, now seen corresponding path program 33 times [2020-12-22 23:49:11,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:49:11,421 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137940482] [2020-12-22 23:49:11,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:49:11,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:49:12,108 INFO L134 CoverageAnalysis]: Checked inductivity of 2515 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 1426 trivial. 0 not checked. [2020-12-22 23:49:12,108 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137940482] [2020-12-22 23:49:12,109 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1105663696] [2020-12-22 23:49:12,109 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 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:49:20,501 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 32 check-sat command(s) [2020-12-22 23:49:20,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:49:20,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 558 conjuncts, 33 conjunts are in the unsatisfiable core [2020-12-22 23:49:20,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:49:20,673 INFO L134 CoverageAnalysis]: Checked inductivity of 2515 backedges. 0 proven. 1426 refuted. 0 times theorem prover too weak. 1089 trivial. 0 not checked. [2020-12-22 23:49:20,674 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:49:20,674 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 34] total 36 [2020-12-22 23:49:20,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950053223] [2020-12-22 23:49:20,675 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-12-22 23:49:20,675 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:49:20,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-12-22 23:49:20,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2020-12-22 23:49:20,676 INFO L87 Difference]: Start difference. First operand 213 states and 280 transitions. Second operand 36 states. [2020-12-22 23:49:21,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:49:21,088 INFO L93 Difference]: Finished difference Result 367 states and 506 transitions. [2020-12-22 23:49:21,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-12-22 23:49:21,088 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 170 [2020-12-22 23:49:21,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:49:21,089 INFO L225 Difference]: With dead ends: 367 [2020-12-22 23:49:21,089 INFO L226 Difference]: Without dead ends: 223 [2020-12-22 23:49:21,090 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2020-12-22 23:49:21,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2020-12-22 23:49:21,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 219. [2020-12-22 23:49:21,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 219 states. [2020-12-22 23:49:21,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 288 transitions. [2020-12-22 23:49:21,097 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 288 transitions. Word has length 170 [2020-12-22 23:49:21,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:49:21,097 INFO L481 AbstractCegarLoop]: Abstraction has 219 states and 288 transitions. [2020-12-22 23:49:21,097 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-12-22 23:49:21,097 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 288 transitions. [2020-12-22 23:49:21,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2020-12-22 23:49:21,098 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:49:21,098 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:49:21,313 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2020-12-22 23:49:21,314 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:49:21,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:49:21,314 INFO L82 PathProgramCache]: Analyzing trace with hash -1422967244, now seen corresponding path program 34 times [2020-12-22 23:49:21,315 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:49:21,315 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761924136] [2020-12-22 23:49:21,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:49:21,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:49:22,028 INFO L134 CoverageAnalysis]: Checked inductivity of 2676 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 1520 trivial. 0 not checked. [2020-12-22 23:49:22,029 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761924136] [2020-12-22 23:49:22,029 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1759345794] [2020-12-22 23:49:22,029 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 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:49:22,177 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 23:49:22,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:49:22,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 586 conjuncts, 36 conjunts are in the unsatisfiable core [2020-12-22 23:49:22,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:49:22,328 INFO L134 CoverageAnalysis]: Checked inductivity of 2676 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 1520 trivial. 0 not checked. [2020-12-22 23:49:22,328 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:49:22,328 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2020-12-22 23:49:22,329 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751695833] [2020-12-22 23:49:22,329 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-12-22 23:49:22,329 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:49:22,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-12-22 23:49:22,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2020-12-22 23:49:22,331 INFO L87 Difference]: Start difference. First operand 219 states and 288 transitions. Second operand 38 states. [2020-12-22 23:49:22,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:49:22,732 INFO L93 Difference]: Finished difference Result 377 states and 520 transitions. [2020-12-22 23:49:22,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-12-22 23:49:22,733 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 175 [2020-12-22 23:49:22,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:49:22,734 INFO L225 Difference]: With dead ends: 377 [2020-12-22 23:49:22,734 INFO L226 Difference]: Without dead ends: 229 [2020-12-22 23:49:22,734 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2020-12-22 23:49:22,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2020-12-22 23:49:22,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 225. [2020-12-22 23:49:22,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 225 states. [2020-12-22 23:49:22,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 296 transitions. [2020-12-22 23:49:22,744 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 296 transitions. Word has length 175 [2020-12-22 23:49:22,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:49:22,744 INFO L481 AbstractCegarLoop]: Abstraction has 225 states and 296 transitions. [2020-12-22 23:49:22,744 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-12-22 23:49:22,744 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 296 transitions. [2020-12-22 23:49:22,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2020-12-22 23:49:22,745 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:49:22,746 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:49:22,957 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:49:22,958 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:49:22,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:49:22,958 INFO L82 PathProgramCache]: Analyzing trace with hash 661473556, now seen corresponding path program 35 times [2020-12-22 23:49:22,959 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:49:22,959 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835312117] [2020-12-22 23:49:22,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:49:22,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:49:23,742 INFO L134 CoverageAnalysis]: Checked inductivity of 2842 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 1617 trivial. 0 not checked. [2020-12-22 23:49:23,743 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835312117] [2020-12-22 23:49:23,743 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1879793979] [2020-12-22 23:49:23,743 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 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:49:37,760 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 36 check-sat command(s) [2020-12-22 23:49:37,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:49:37,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 602 conjuncts, 37 conjunts are in the unsatisfiable core [2020-12-22 23:49:37,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:49:37,948 INFO L134 CoverageAnalysis]: Checked inductivity of 2842 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 1617 trivial. 0 not checked. [2020-12-22 23:49:37,950 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:49:37,951 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 39 [2020-12-22 23:49:37,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363631780] [2020-12-22 23:49:37,951 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-12-22 23:49:37,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:49:37,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-12-22 23:49:37,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2020-12-22 23:49:37,953 INFO L87 Difference]: Start difference. First operand 225 states and 296 transitions. Second operand 39 states. [2020-12-22 23:49:38,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:49:38,369 INFO L93 Difference]: Finished difference Result 387 states and 534 transitions. [2020-12-22 23:49:38,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-12-22 23:49:38,369 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 180 [2020-12-22 23:49:38,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:49:38,371 INFO L225 Difference]: With dead ends: 387 [2020-12-22 23:49:38,371 INFO L226 Difference]: Without dead ends: 235 [2020-12-22 23:49:38,372 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2020-12-22 23:49:38,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2020-12-22 23:49:38,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 231. [2020-12-22 23:49:38,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 231 states. [2020-12-22 23:49:38,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 304 transitions. [2020-12-22 23:49:38,379 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 304 transitions. Word has length 180 [2020-12-22 23:49:38,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:49:38,379 INFO L481 AbstractCegarLoop]: Abstraction has 231 states and 304 transitions. [2020-12-22 23:49:38,379 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-12-22 23:49:38,379 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 304 transitions. [2020-12-22 23:49:38,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2020-12-22 23:49:38,380 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:49:38,380 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:49:38,581 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-12-22 23:49:38,581 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:49:38,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:49:38,582 INFO L82 PathProgramCache]: Analyzing trace with hash -1646497168, now seen corresponding path program 36 times [2020-12-22 23:49:38,582 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:49:38,582 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497244295] [2020-12-22 23:49:38,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:49:38,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:49:39,400 INFO L134 CoverageAnalysis]: Checked inductivity of 3013 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 1717 trivial. 0 not checked. [2020-12-22 23:49:39,400 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497244295] [2020-12-22 23:49:39,400 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896468574] [2020-12-22 23:49:39,401 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 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:50:01,749 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2020-12-22 23:50:01,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:50:01,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 618 conjuncts, 38 conjunts are in the unsatisfiable core [2020-12-22 23:50:01,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:50:01,938 INFO L134 CoverageAnalysis]: Checked inductivity of 3013 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 1717 trivial. 0 not checked. [2020-12-22 23:50:01,938 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:50:01,939 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 40 [2020-12-22 23:50:01,939 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632710454] [2020-12-22 23:50:01,939 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-12-22 23:50:01,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:50:01,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-12-22 23:50:01,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2020-12-22 23:50:01,941 INFO L87 Difference]: Start difference. First operand 231 states and 304 transitions. Second operand 40 states. [2020-12-22 23:50:02,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:50:02,402 INFO L93 Difference]: Finished difference Result 397 states and 548 transitions. [2020-12-22 23:50:02,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-12-22 23:50:02,402 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 185 [2020-12-22 23:50:02,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:50:02,403 INFO L225 Difference]: With dead ends: 397 [2020-12-22 23:50:02,403 INFO L226 Difference]: Without dead ends: 241 [2020-12-22 23:50:02,404 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2020-12-22 23:50:02,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2020-12-22 23:50:02,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 237. [2020-12-22 23:50:02,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 237 states. [2020-12-22 23:50:02,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 312 transitions. [2020-12-22 23:50:02,411 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 312 transitions. Word has length 185 [2020-12-22 23:50:02,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:50:02,411 INFO L481 AbstractCegarLoop]: Abstraction has 237 states and 312 transitions. [2020-12-22 23:50:02,411 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-12-22 23:50:02,412 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 312 transitions. [2020-12-22 23:50:02,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2020-12-22 23:50:02,413 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:50:02,413 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:50:02,627 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-12-22 23:50:02,628 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:50:02,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:50:02,628 INFO L82 PathProgramCache]: Analyzing trace with hash -200957736, now seen corresponding path program 37 times [2020-12-22 23:50:02,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:50:02,629 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146671145] [2020-12-22 23:50:02,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:50:02,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:50:03,486 INFO L134 CoverageAnalysis]: Checked inductivity of 3189 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 1820 trivial. 0 not checked. [2020-12-22 23:50:03,487 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146671145] [2020-12-22 23:50:03,487 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799700908] [2020-12-22 23:50:03,487 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 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:50:03,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:50:03,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 634 conjuncts, 39 conjunts are in the unsatisfiable core [2020-12-22 23:50:03,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:50:03,814 INFO L134 CoverageAnalysis]: Checked inductivity of 3189 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 1820 trivial. 0 not checked. [2020-12-22 23:50:03,815 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:50:03,815 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 41 [2020-12-22 23:50:03,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646977470] [2020-12-22 23:50:03,816 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-12-22 23:50:03,816 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:50:03,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-12-22 23:50:03,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2020-12-22 23:50:03,817 INFO L87 Difference]: Start difference. First operand 237 states and 312 transitions. Second operand 41 states. [2020-12-22 23:50:04,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:50:04,324 INFO L93 Difference]: Finished difference Result 407 states and 562 transitions. [2020-12-22 23:50:04,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-12-22 23:50:04,324 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 190 [2020-12-22 23:50:04,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:50:04,326 INFO L225 Difference]: With dead ends: 407 [2020-12-22 23:50:04,326 INFO L226 Difference]: Without dead ends: 247 [2020-12-22 23:50:04,327 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2020-12-22 23:50:04,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2020-12-22 23:50:04,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 243. [2020-12-22 23:50:04,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 243 states. [2020-12-22 23:50:04,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 320 transitions. [2020-12-22 23:50:04,334 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 320 transitions. Word has length 190 [2020-12-22 23:50:04,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:50:04,334 INFO L481 AbstractCegarLoop]: Abstraction has 243 states and 320 transitions. [2020-12-22 23:50:04,334 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-12-22 23:50:04,334 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 320 transitions. [2020-12-22 23:50:04,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2020-12-22 23:50:04,336 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:50:04,336 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 36, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:50:04,551 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-12-22 23:50:04,552 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:50:04,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:50:04,552 INFO L82 PathProgramCache]: Analyzing trace with hash 207781548, now seen corresponding path program 38 times [2020-12-22 23:50:04,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:50:04,553 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930685176] [2020-12-22 23:50:04,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:50:04,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:50:05,463 INFO L134 CoverageAnalysis]: Checked inductivity of 3370 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 1926 trivial. 0 not checked. [2020-12-22 23:50:05,464 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930685176] [2020-12-22 23:50:05,464 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [599032561] [2020-12-22 23:50:05,464 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 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:50:05,614 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 23:50:05,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:50:05,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 650 conjuncts, 40 conjunts are in the unsatisfiable core [2020-12-22 23:50:05,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:50:05,799 INFO L134 CoverageAnalysis]: Checked inductivity of 3370 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 1926 trivial. 0 not checked. [2020-12-22 23:50:05,800 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:50:05,800 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 42 [2020-12-22 23:50:05,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740444019] [2020-12-22 23:50:05,801 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-12-22 23:50:05,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:50:05,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-12-22 23:50:05,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2020-12-22 23:50:05,802 INFO L87 Difference]: Start difference. First operand 243 states and 320 transitions. Second operand 42 states. [2020-12-22 23:50:06,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:50:06,383 INFO L93 Difference]: Finished difference Result 417 states and 576 transitions. [2020-12-22 23:50:06,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-12-22 23:50:06,384 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 195 [2020-12-22 23:50:06,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:50:06,386 INFO L225 Difference]: With dead ends: 417 [2020-12-22 23:50:06,386 INFO L226 Difference]: Without dead ends: 253 [2020-12-22 23:50:06,387 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 195 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2020-12-22 23:50:06,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2020-12-22 23:50:06,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 249. [2020-12-22 23:50:06,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 249 states. [2020-12-22 23:50:06,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 328 transitions. [2020-12-22 23:50:06,393 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 328 transitions. Word has length 195 [2020-12-22 23:50:06,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:50:06,394 INFO L481 AbstractCegarLoop]: Abstraction has 249 states and 328 transitions. [2020-12-22 23:50:06,394 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-12-22 23:50:06,394 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 328 transitions. [2020-12-22 23:50:06,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2020-12-22 23:50:06,395 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:50:06,396 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 37, 37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:50:06,610 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-12-22 23:50:06,611 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:50:06,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:50:06,612 INFO L82 PathProgramCache]: Analyzing trace with hash -799194980, now seen corresponding path program 39 times [2020-12-22 23:50:06,612 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:50:06,612 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822737377] [2020-12-22 23:50:06,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:50:06,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:50:07,516 INFO L134 CoverageAnalysis]: Checked inductivity of 3556 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 2035 trivial. 0 not checked. [2020-12-22 23:50:07,516 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822737377] [2020-12-22 23:50:07,517 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1374456478] [2020-12-22 23:50:07,517 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:50:27,795 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 38 check-sat command(s) [2020-12-22 23:50:27,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:50:27,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 654 conjuncts, 39 conjunts are in the unsatisfiable core [2020-12-22 23:50:27,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:50:27,987 INFO L134 CoverageAnalysis]: Checked inductivity of 3556 backedges. 0 proven. 2035 refuted. 0 times theorem prover too weak. 1521 trivial. 0 not checked. [2020-12-22 23:50:27,987 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:50:27,987 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 40] total 42 [2020-12-22 23:50:27,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246768416] [2020-12-22 23:50:27,988 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-12-22 23:50:27,988 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:50:27,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-12-22 23:50:27,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2020-12-22 23:50:27,989 INFO L87 Difference]: Start difference. First operand 249 states and 328 transitions. Second operand 42 states. [2020-12-22 23:50:28,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:50:28,505 INFO L93 Difference]: Finished difference Result 427 states and 590 transitions. [2020-12-22 23:50:28,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-12-22 23:50:28,506 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 200 [2020-12-22 23:50:28,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:50:28,507 INFO L225 Difference]: With dead ends: 427 [2020-12-22 23:50:28,507 INFO L226 Difference]: Without dead ends: 259 [2020-12-22 23:50:28,508 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 201 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2020-12-22 23:50:28,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2020-12-22 23:50:28,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 255. [2020-12-22 23:50:28,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 255 states. [2020-12-22 23:50:28,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 336 transitions. [2020-12-22 23:50:28,514 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 336 transitions. Word has length 200 [2020-12-22 23:50:28,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:50:28,514 INFO L481 AbstractCegarLoop]: Abstraction has 255 states and 336 transitions. [2020-12-22 23:50:28,515 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-12-22 23:50:28,515 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 336 transitions. [2020-12-22 23:50:28,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2020-12-22 23:50:28,516 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:50:28,516 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 38, 38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:50:28,729 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:50:28,730 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:50:28,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:50:28,730 INFO L82 PathProgramCache]: Analyzing trace with hash -359587096, now seen corresponding path program 40 times [2020-12-22 23:50:28,731 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:50:28,731 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572821395] [2020-12-22 23:50:28,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:50:28,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:50:29,707 INFO L134 CoverageAnalysis]: Checked inductivity of 3747 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 2147 trivial. 0 not checked. [2020-12-22 23:50:29,707 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572821395] [2020-12-22 23:50:29,708 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1201792758] [2020-12-22 23:50:29,708 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 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:50:29,854 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 23:50:29,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:50:29,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 682 conjuncts, 42 conjunts are in the unsatisfiable core [2020-12-22 23:50:29,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:50:30,008 INFO L134 CoverageAnalysis]: Checked inductivity of 3747 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 2147 trivial. 0 not checked. [2020-12-22 23:50:30,009 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:50:30,009 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 44 [2020-12-22 23:50:30,009 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538260092] [2020-12-22 23:50:30,009 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-12-22 23:50:30,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:50:30,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-12-22 23:50:30,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2020-12-22 23:50:30,011 INFO L87 Difference]: Start difference. First operand 255 states and 336 transitions. Second operand 44 states. [2020-12-22 23:50:30,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:50:30,577 INFO L93 Difference]: Finished difference Result 437 states and 604 transitions. [2020-12-22 23:50:30,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-12-22 23:50:30,578 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 205 [2020-12-22 23:50:30,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:50:30,579 INFO L225 Difference]: With dead ends: 437 [2020-12-22 23:50:30,579 INFO L226 Difference]: Without dead ends: 265 [2020-12-22 23:50:30,580 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 205 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2020-12-22 23:50:30,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2020-12-22 23:50:30,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 261. [2020-12-22 23:50:30,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 261 states. [2020-12-22 23:50:30,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 344 transitions. [2020-12-22 23:50:30,586 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 344 transitions. Word has length 205 [2020-12-22 23:50:30,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:50:30,587 INFO L481 AbstractCegarLoop]: Abstraction has 261 states and 344 transitions. [2020-12-22 23:50:30,587 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-12-22 23:50:30,587 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 344 transitions. [2020-12-22 23:50:30,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2020-12-22 23:50:30,588 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:50:30,588 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 39, 39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:50:30,802 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2020-12-22 23:50:30,803 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:50:30,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:50:30,803 INFO L82 PathProgramCache]: Analyzing trace with hash -618370976, now seen corresponding path program 41 times [2020-12-22 23:50:30,804 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:50:30,804 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702333838] [2020-12-22 23:50:30,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:50:30,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:50:31,859 INFO L134 CoverageAnalysis]: Checked inductivity of 3943 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 2262 trivial. 0 not checked. [2020-12-22 23:50:31,859 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702333838] [2020-12-22 23:50:31,859 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1904287534] [2020-12-22 23:50:31,860 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 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:51:38,782 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 42 check-sat command(s) [2020-12-22 23:51:38,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:51:38,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 698 conjuncts, 43 conjunts are in the unsatisfiable core [2020-12-22 23:51:38,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:51:39,023 INFO L134 CoverageAnalysis]: Checked inductivity of 3943 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 2262 trivial. 0 not checked. [2020-12-22 23:51:39,024 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:51:39,024 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 45 [2020-12-22 23:51:39,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634907816] [2020-12-22 23:51:39,025 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-12-22 23:51:39,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:51:39,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-12-22 23:51:39,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2020-12-22 23:51:39,027 INFO L87 Difference]: Start difference. First operand 261 states and 344 transitions. Second operand 45 states. [2020-12-22 23:51:39,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:51:39,567 INFO L93 Difference]: Finished difference Result 447 states and 618 transitions. [2020-12-22 23:51:39,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-12-22 23:51:39,568 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 210 [2020-12-22 23:51:39,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:51:39,569 INFO L225 Difference]: With dead ends: 447 [2020-12-22 23:51:39,570 INFO L226 Difference]: Without dead ends: 271 [2020-12-22 23:51:39,571 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 210 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2020-12-22 23:51:39,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2020-12-22 23:51:39,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 267. [2020-12-22 23:51:39,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 267 states. [2020-12-22 23:51:39,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 352 transitions. [2020-12-22 23:51:39,578 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 352 transitions. Word has length 210 [2020-12-22 23:51:39,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:51:39,578 INFO L481 AbstractCegarLoop]: Abstraction has 267 states and 352 transitions. [2020-12-22 23:51:39,578 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-12-22 23:51:39,578 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 352 transitions. [2020-12-22 23:51:39,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2020-12-22 23:51:39,580 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:51:39,580 INFO L422 BasicCegarLoop]: trace histogram [42, 42, 40, 40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:51:39,795 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:51:39,795 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:51:39,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:51:39,796 INFO L82 PathProgramCache]: Analyzing trace with hash 909647652, now seen corresponding path program 42 times [2020-12-22 23:51:39,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:51:39,796 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085862035] [2020-12-22 23:51:39,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:51:39,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:51:40,883 INFO L134 CoverageAnalysis]: Checked inductivity of 4144 backedges. 0 proven. 1764 refuted. 0 times theorem prover too weak. 2380 trivial. 0 not checked. [2020-12-22 23:51:40,883 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085862035] [2020-12-22 23:51:40,884 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1098074938] [2020-12-22 23:51:40,884 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 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:52:03,145 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2020-12-22 23:52:03,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:52:03,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 714 conjuncts, 61 conjunts are in the unsatisfiable core [2020-12-22 23:52:03,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:52:03,353 INFO L134 CoverageAnalysis]: Checked inductivity of 4144 backedges. 0 proven. 1764 refuted. 0 times theorem prover too weak. 2380 trivial. 0 not checked. [2020-12-22 23:52:03,354 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:52:03,354 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 46 [2020-12-22 23:52:03,354 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150371981] [2020-12-22 23:52:03,355 INFO L461 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-12-22 23:52:03,355 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:52:03,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-12-22 23:52:03,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2020-12-22 23:52:03,356 INFO L87 Difference]: Start difference. First operand 267 states and 352 transitions. Second operand 46 states. [2020-12-22 23:52:03,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:52:03,939 INFO L93 Difference]: Finished difference Result 457 states and 632 transitions. [2020-12-22 23:52:03,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-12-22 23:52:03,940 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 215 [2020-12-22 23:52:03,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:52:03,942 INFO L225 Difference]: With dead ends: 457 [2020-12-22 23:52:03,942 INFO L226 Difference]: Without dead ends: 277 [2020-12-22 23:52:03,943 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 215 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2020-12-22 23:52:03,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2020-12-22 23:52:03,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 273. [2020-12-22 23:52:03,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 273 states. [2020-12-22 23:52:03,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 360 transitions. [2020-12-22 23:52:03,950 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 360 transitions. Word has length 215 [2020-12-22 23:52:03,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:52:03,951 INFO L481 AbstractCegarLoop]: Abstraction has 273 states and 360 transitions. [2020-12-22 23:52:03,951 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-12-22 23:52:03,951 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 360 transitions. [2020-12-22 23:52:03,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2020-12-22 23:52:03,952 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:52:03,952 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 41, 41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:52:04,153 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:52:04,153 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:52:04,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:52:04,154 INFO L82 PathProgramCache]: Analyzing trace with hash -888448988, now seen corresponding path program 43 times [2020-12-22 23:52:04,154 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:52:04,154 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631231857] [2020-12-22 23:52:04,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:52:04,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:52:05,350 INFO L134 CoverageAnalysis]: Checked inductivity of 4350 backedges. 0 proven. 1849 refuted. 0 times theorem prover too weak. 2501 trivial. 0 not checked. [2020-12-22 23:52:05,350 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631231857] [2020-12-22 23:52:05,350 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [522832790] [2020-12-22 23:52:05,351 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 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:52:05,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:52:05,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 730 conjuncts, 45 conjunts are in the unsatisfiable core [2020-12-22 23:52:05,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:52:05,679 INFO L134 CoverageAnalysis]: Checked inductivity of 4350 backedges. 0 proven. 1849 refuted. 0 times theorem prover too weak. 2501 trivial. 0 not checked. [2020-12-22 23:52:05,679 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:52:05,679 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 47 [2020-12-22 23:52:05,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627817356] [2020-12-22 23:52:05,680 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-12-22 23:52:05,680 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:52:05,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-12-22 23:52:05,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2020-12-22 23:52:05,681 INFO L87 Difference]: Start difference. First operand 273 states and 360 transitions. Second operand 47 states. [2020-12-22 23:52:06,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:52:06,316 INFO L93 Difference]: Finished difference Result 467 states and 646 transitions. [2020-12-22 23:52:06,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-12-22 23:52:06,317 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 220 [2020-12-22 23:52:06,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:52:06,318 INFO L225 Difference]: With dead ends: 467 [2020-12-22 23:52:06,318 INFO L226 Difference]: Without dead ends: 283 [2020-12-22 23:52:06,319 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 220 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2020-12-22 23:52:06,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2020-12-22 23:52:06,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 279. [2020-12-22 23:52:06,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 279 states. [2020-12-22 23:52:06,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 368 transitions. [2020-12-22 23:52:06,326 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 368 transitions. Word has length 220 [2020-12-22 23:52:06,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:52:06,327 INFO L481 AbstractCegarLoop]: Abstraction has 279 states and 368 transitions. [2020-12-22 23:52:06,327 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-12-22 23:52:06,327 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 368 transitions. [2020-12-22 23:52:06,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2020-12-22 23:52:06,328 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:52:06,329 INFO L422 BasicCegarLoop]: trace histogram [44, 44, 42, 42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:52:06,543 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2020-12-22 23:52:06,544 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:52:06,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:52:06,544 INFO L82 PathProgramCache]: Analyzing trace with hash -1289276576, now seen corresponding path program 44 times [2020-12-22 23:52:06,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:52:06,545 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931050189] [2020-12-22 23:52:06,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:52:06,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:52:07,751 INFO L134 CoverageAnalysis]: Checked inductivity of 4561 backedges. 0 proven. 1936 refuted. 0 times theorem prover too weak. 2625 trivial. 0 not checked. [2020-12-22 23:52:07,751 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931050189] [2020-12-22 23:52:07,751 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [966985644] [2020-12-22 23:52:07,751 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 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:52:07,930 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 23:52:07,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:52:07,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 746 conjuncts, 46 conjunts are in the unsatisfiable core [2020-12-22 23:52:07,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:52:08,102 INFO L134 CoverageAnalysis]: Checked inductivity of 4561 backedges. 0 proven. 1936 refuted. 0 times theorem prover too weak. 2625 trivial. 0 not checked. [2020-12-22 23:52:08,102 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:52:08,103 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 48 [2020-12-22 23:52:08,103 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335724798] [2020-12-22 23:52:08,103 INFO L461 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-12-22 23:52:08,103 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:52:08,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-12-22 23:52:08,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2020-12-22 23:52:08,104 INFO L87 Difference]: Start difference. First operand 279 states and 368 transitions. Second operand 48 states. [2020-12-22 23:52:08,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:52:08,769 INFO L93 Difference]: Finished difference Result 477 states and 660 transitions. [2020-12-22 23:52:08,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-12-22 23:52:08,770 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 225 [2020-12-22 23:52:08,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:52:08,771 INFO L225 Difference]: With dead ends: 477 [2020-12-22 23:52:08,771 INFO L226 Difference]: Without dead ends: 289 [2020-12-22 23:52:08,772 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 225 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2020-12-22 23:52:08,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2020-12-22 23:52:08,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 285. [2020-12-22 23:52:08,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 285 states. [2020-12-22 23:52:08,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 376 transitions. [2020-12-22 23:52:08,779 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 376 transitions. Word has length 225 [2020-12-22 23:52:08,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:52:08,779 INFO L481 AbstractCegarLoop]: Abstraction has 285 states and 376 transitions. [2020-12-22 23:52:08,779 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-12-22 23:52:08,779 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 376 transitions. [2020-12-22 23:52:08,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2020-12-22 23:52:08,780 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:52:08,781 INFO L422 BasicCegarLoop]: trace histogram [45, 45, 43, 43, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:52:08,981 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2020-12-22 23:52:08,982 INFO L429 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:52:08,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:52:08,983 INFO L82 PathProgramCache]: Analyzing trace with hash 851595240, now seen corresponding path program 45 times [2020-12-22 23:52:08,983 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:52:08,983 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167354046] [2020-12-22 23:52:08,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:52:09,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:52:10,188 INFO L134 CoverageAnalysis]: Checked inductivity of 4777 backedges. 0 proven. 2025 refuted. 0 times theorem prover too weak. 2752 trivial. 0 not checked. [2020-12-22 23:52:10,190 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167354046] [2020-12-22 23:52:10,190 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [45653679] [2020-12-22 23:52:10,191 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true