/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/standard_partition_original_ground.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 00:07:28,035 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 00:07:28,039 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 00:07:28,103 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-23 00:07:28,103 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-23 00:07:28,108 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-23 00:07:28,113 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-23 00:07:28,119 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-23 00:07:28,123 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-23 00:07:28,129 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-23 00:07:28,130 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-23 00:07:28,132 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-23 00:07:28,133 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 00:07:28,139 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 00:07:28,142 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 00:07:28,144 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 00:07:28,146 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 00:07:28,149 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 00:07:28,176 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 00:07:28,183 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 00:07:28,186 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 00:07:28,189 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 00:07:28,191 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 00:07:28,192 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 00:07:28,201 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-23 00:07:28,223 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 00:07:28,225 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 00:07:28,226 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 00:07:28,227 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-23 00:07:28,279 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 00:07:28,279 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 00:07:28,285 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 00:07:28,286 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 00:07:28,286 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 00:07:28,286 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 00:07:28,286 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 00:07:28,287 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 00:07:28,287 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-23 00:07:28,287 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 00:07:28,288 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-23 00:07:28,289 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-23 00:07:28,289 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 00:07:28,289 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-23 00:07:28,289 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 00:07:28,290 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 00:07:28,290 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 00:07:28,290 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 00:07:28,290 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 00:07:28,291 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 00:07:28,291 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-23 00:07:28,291 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 00:07:28,291 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 00:07:28,291 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-23 00:07:28,292 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 00:07:28,292 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 00:07:28,742 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 00:07:28,793 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 00:07:28,796 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 00:07:28,798 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 00:07:28,799 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 00:07:28,800 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/standard_partition_original_ground.i [2020-12-23 00:07:28,902 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/5e017ac65/75df0cb972954a9798791809493de018/FLAG3cec5d3d5 [2020-12-23 00:07:29,534 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 00:07:29,534 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-examples/standard_partition_original_ground.i [2020-12-23 00:07:29,549 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/5e017ac65/75df0cb972954a9798791809493de018/FLAG3cec5d3d5 [2020-12-23 00:07:29,891 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/5e017ac65/75df0cb972954a9798791809493de018 [2020-12-23 00:07:29,896 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 00:07:29,901 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 00:07:29,904 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 00:07:29,904 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 00:07:29,910 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 00:07:29,912 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 12:07:29" (1/1) ... [2020-12-23 00:07:29,914 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@c88123e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:07:29, skipping insertion in model container [2020-12-23 00:07:29,915 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 12:07:29" (1/1) ... [2020-12-23 00:07:29,923 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 00:07:29,951 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-23 00:07:30,112 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/standard_partition_original_ground.i[827,840] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~aa~0,],[IdentifierExpression[~i~0,]]] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~bb~0,],[IdentifierExpression[~b~0,]]] left hand side expression in assignment: lhs: VariableLHS[~b~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~cc~0,],[IdentifierExpression[~c~0,]]] left hand side expression in assignment: lhs: VariableLHS[~c~0,] left hand side expression in assignment: lhs: VariableLHS[~a~0,] left hand side expression in assignment: lhs: VariableLHS[~x~0,] left hand side expression in assignment: lhs: VariableLHS[~x~0,] [2020-12-23 00:07:30,135 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 00:07:30,145 INFO L203 MainTranslator]: Completed pre-run [2020-12-23 00:07:30,159 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/standard_partition_original_ground.i[827,840] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#aa~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#aa~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#bb~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#bb~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~b~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~b~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#cc~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#cc~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~c~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~c~0,] left hand side expression in assignment: lhs: VariableLHS[~a~0,] left hand side expression in assignment: lhs: VariableLHS[~x~0,] left hand side expression in assignment: lhs: VariableLHS[~x~0,] [2020-12-23 00:07:30,171 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 00:07:30,189 INFO L208 MainTranslator]: Completed translation [2020-12-23 00:07:30,190 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:07:30 WrapperNode [2020-12-23 00:07:30,190 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 00:07:30,192 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 00:07:30,192 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 00:07:30,192 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 00:07:30,203 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:07:30" (1/1) ... [2020-12-23 00:07:30,217 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:07:30" (1/1) ... [2020-12-23 00:07:30,263 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 00:07:30,266 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 00:07:30,267 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 00:07:30,267 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 00:07:30,278 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:07:30" (1/1) ... [2020-12-23 00:07:30,279 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:07:30" (1/1) ... [2020-12-23 00:07:30,292 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:07:30" (1/1) ... [2020-12-23 00:07:30,292 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:07:30" (1/1) ... [2020-12-23 00:07:30,304 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:07:30" (1/1) ... [2020-12-23 00:07:30,309 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:07:30" (1/1) ... [2020-12-23 00:07:30,311 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:07:30" (1/1) ... [2020-12-23 00:07:30,314 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 00:07:30,315 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 00:07:30,315 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 00:07:30,315 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 00:07:30,317 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:07:30" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 00:07:30,446 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-23 00:07:30,446 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 00:07:30,447 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-23 00:07:30,447 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 00:07:30,447 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 00:07:30,447 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-23 00:07:30,448 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-23 00:07:30,892 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 00:07:30,893 INFO L299 CfgBuilder]: Removed 12 assume(true) statements. [2020-12-23 00:07:30,900 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 12:07:30 BoogieIcfgContainer [2020-12-23 00:07:30,901 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 00:07:30,903 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 00:07:30,904 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 00:07:30,915 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 00:07:30,917 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 12:07:29" (1/3) ... [2020-12-23 00:07:30,919 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a9ab568 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 12:07:30, skipping insertion in model container [2020-12-23 00:07:30,919 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:07:30" (2/3) ... [2020-12-23 00:07:30,919 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a9ab568 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 12:07:30, skipping insertion in model container [2020-12-23 00:07:30,919 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 12:07:30" (3/3) ... [2020-12-23 00:07:30,925 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_partition_original_ground.i [2020-12-23 00:07:30,946 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 00:07:30,961 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-23 00:07:30,992 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-23 00:07:31,041 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 00:07:31,043 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-23 00:07:31,043 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 00:07:31,043 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 00:07:31,044 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 00:07:31,044 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 00:07:31,044 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 00:07:31,044 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 00:07:31,065 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2020-12-23 00:07:31,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-23 00:07:31,072 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:07:31,076 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:07:31,077 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:07:31,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:07:31,087 INFO L82 PathProgramCache]: Analyzing trace with hash 227193477, now seen corresponding path program 1 times [2020-12-23 00:07:31,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:07:31,101 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149241669] [2020-12-23 00:07:31,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:07:31,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:07:31,358 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:07:31,359 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149241669] [2020-12-23 00:07:31,361 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 00:07:31,361 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-23 00:07:31,363 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236063378] [2020-12-23 00:07:31,369 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-23 00:07:31,369 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:07:31,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-23 00:07:31,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-23 00:07:31,399 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 2 states. [2020-12-23 00:07:31,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:07:31,427 INFO L93 Difference]: Finished difference Result 46 states and 64 transitions. [2020-12-23 00:07:31,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-23 00:07:31,428 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 8 [2020-12-23 00:07:31,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:07:31,455 INFO L225 Difference]: With dead ends: 46 [2020-12-23 00:07:31,456 INFO L226 Difference]: Without dead ends: 21 [2020-12-23 00:07:31,460 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-23 00:07:31,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-12-23 00:07:31,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-12-23 00:07:31,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-12-23 00:07:31,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2020-12-23 00:07:31,508 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 8 [2020-12-23 00:07:31,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:07:31,509 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2020-12-23 00:07:31,509 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-23 00:07:31,509 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2020-12-23 00:07:31,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-23 00:07:31,512 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:07:31,513 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:07:31,513 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-23 00:07:31,514 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:07:31,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:07:31,518 INFO L82 PathProgramCache]: Analyzing trace with hash 217034746, now seen corresponding path program 1 times [2020-12-23 00:07:31,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:07:31,519 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188766202] [2020-12-23 00:07:31,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:07:31,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:07:31,635 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:07:31,636 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188766202] [2020-12-23 00:07:31,636 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 00:07:31,636 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 00:07:31,637 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271678944] [2020-12-23 00:07:31,638 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 00:07:31,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:07:31,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 00:07:31,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 00:07:31,640 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 3 states. [2020-12-23 00:07:31,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:07:31,662 INFO L93 Difference]: Finished difference Result 40 states and 48 transitions. [2020-12-23 00:07:31,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 00:07:31,663 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2020-12-23 00:07:31,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:07:31,664 INFO L225 Difference]: With dead ends: 40 [2020-12-23 00:07:31,665 INFO L226 Difference]: Without dead ends: 23 [2020-12-23 00:07:31,666 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 [2020-12-23 00:07:31,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-12-23 00:07:31,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2020-12-23 00:07:31,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-12-23 00:07:31,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2020-12-23 00:07:31,672 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 8 [2020-12-23 00:07:31,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:07:31,673 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2020-12-23 00:07:31,673 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 00:07:31,673 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2020-12-23 00:07:31,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-23 00:07:31,674 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:07:31,674 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:07:31,674 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-23 00:07:31,674 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:07:31,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:07:31,675 INFO L82 PathProgramCache]: Analyzing trace with hash 1440932604, now seen corresponding path program 1 times [2020-12-23 00:07:31,675 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:07:31,676 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750960585] [2020-12-23 00:07:31,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:07:31,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:07:31,734 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 00:07:31,738 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750960585] [2020-12-23 00:07:31,739 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 00:07:31,739 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 00:07:31,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009493774] [2020-12-23 00:07:31,740 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 00:07:31,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:07:31,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 00:07:31,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 00:07:31,741 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand 3 states. [2020-12-23 00:07:31,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:07:31,777 INFO L93 Difference]: Finished difference Result 39 states and 46 transitions. [2020-12-23 00:07:31,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 00:07:31,778 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2020-12-23 00:07:31,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:07:31,779 INFO L225 Difference]: With dead ends: 39 [2020-12-23 00:07:31,779 INFO L226 Difference]: Without dead ends: 25 [2020-12-23 00:07:31,780 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 [2020-12-23 00:07:31,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-12-23 00:07:31,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 23. [2020-12-23 00:07:31,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-12-23 00:07:31,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2020-12-23 00:07:31,785 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 10 [2020-12-23 00:07:31,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:07:31,785 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2020-12-23 00:07:31,786 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 00:07:31,786 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2020-12-23 00:07:31,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-23 00:07:31,786 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:07:31,786 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:07:31,787 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-23 00:07:31,787 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:07:31,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:07:31,788 INFO L82 PathProgramCache]: Analyzing trace with hash -1060419033, now seen corresponding path program 1 times [2020-12-23 00:07:31,788 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:07:31,788 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610235542] [2020-12-23 00:07:31,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:07:31,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:07:31,832 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 00:07:31,832 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610235542] [2020-12-23 00:07:31,833 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1838689659] [2020-12-23 00:07:31,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:07:31,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:07:31,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-23 00:07:31,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:07:31,973 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 00:07:31,974 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:07:31,974 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-12-23 00:07:31,974 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833468404] [2020-12-23 00:07:31,975 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 00:07:31,975 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:07:31,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 00:07:31,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-23 00:07:31,976 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand 5 states. [2020-12-23 00:07:32,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:07:32,003 INFO L93 Difference]: Finished difference Result 44 states and 52 transitions. [2020-12-23 00:07:32,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 00:07:32,004 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-12-23 00:07:32,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:07:32,005 INFO L225 Difference]: With dead ends: 44 [2020-12-23 00:07:32,005 INFO L226 Difference]: Without dead ends: 26 [2020-12-23 00:07:32,006 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 [2020-12-23 00:07:32,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-12-23 00:07:32,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2020-12-23 00:07:32,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-12-23 00:07:32,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2020-12-23 00:07:32,015 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 13 [2020-12-23 00:07:32,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:07:32,016 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2020-12-23 00:07:32,016 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 00:07:32,016 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2020-12-23 00:07:32,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-23 00:07:32,017 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:07:32,017 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:07:32,231 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:07:32,232 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:07:32,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:07:32,234 INFO L82 PathProgramCache]: Analyzing trace with hash 575252581, now seen corresponding path program 2 times [2020-12-23 00:07:32,234 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:07:32,235 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636329808] [2020-12-23 00:07:32,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:07:32,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:07:32,332 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-23 00:07:32,333 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636329808] [2020-12-23 00:07:32,333 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1355249784] [2020-12-23 00:07:32,333 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 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:07:32,422 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 00:07:32,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:07:32,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-23 00:07:32,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:07:32,471 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 00:07:32,471 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:07:32,472 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 7 [2020-12-23 00:07:32,472 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305287808] [2020-12-23 00:07:32,473 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-23 00:07:32,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:07:32,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-23 00:07:32,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-23 00:07:32,474 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand 7 states. [2020-12-23 00:07:32,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:07:32,553 INFO L93 Difference]: Finished difference Result 51 states and 62 transitions. [2020-12-23 00:07:32,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-23 00:07:32,554 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 15 [2020-12-23 00:07:32,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:07:32,556 INFO L225 Difference]: With dead ends: 51 [2020-12-23 00:07:32,556 INFO L226 Difference]: Without dead ends: 33 [2020-12-23 00:07:32,557 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2020-12-23 00:07:32,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-12-23 00:07:32,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 30. [2020-12-23 00:07:32,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-12-23 00:07:32,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2020-12-23 00:07:32,564 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 15 [2020-12-23 00:07:32,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:07:32,564 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2020-12-23 00:07:32,565 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-23 00:07:32,565 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2020-12-23 00:07:32,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-23 00:07:32,566 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:07:32,566 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:07:32,780 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:07:32,781 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:07:32,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:07:32,783 INFO L82 PathProgramCache]: Analyzing trace with hash -621086560, now seen corresponding path program 3 times [2020-12-23 00:07:32,784 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:07:32,784 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617060755] [2020-12-23 00:07:32,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:07:32,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:07:32,918 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-23 00:07:32,918 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617060755] [2020-12-23 00:07:32,918 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2143586318] [2020-12-23 00:07:32,919 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 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:07:32,999 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-23 00:07:32,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:07:33,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-23 00:07:33,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:07:33,061 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-23 00:07:33,062 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:07:33,062 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 9 [2020-12-23 00:07:33,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558117785] [2020-12-23 00:07:33,063 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-23 00:07:33,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:07:33,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-23 00:07:33,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-12-23 00:07:33,066 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand 9 states. [2020-12-23 00:07:33,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:07:33,193 INFO L93 Difference]: Finished difference Result 59 states and 72 transitions. [2020-12-23 00:07:33,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-23 00:07:33,194 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 20 [2020-12-23 00:07:33,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:07:33,195 INFO L225 Difference]: With dead ends: 59 [2020-12-23 00:07:33,195 INFO L226 Difference]: Without dead ends: 38 [2020-12-23 00:07:33,196 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2020-12-23 00:07:33,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-12-23 00:07:33,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 35. [2020-12-23 00:07:33,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-12-23 00:07:33,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 41 transitions. [2020-12-23 00:07:33,203 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 41 transitions. Word has length 20 [2020-12-23 00:07:33,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:07:33,203 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 41 transitions. [2020-12-23 00:07:33,204 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-23 00:07:33,204 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2020-12-23 00:07:33,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-12-23 00:07:33,205 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:07:33,205 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:07:33,420 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:07:33,421 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:07:33,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:07:33,423 INFO L82 PathProgramCache]: Analyzing trace with hash 864930497, now seen corresponding path program 4 times [2020-12-23 00:07:33,423 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:07:33,424 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653785378] [2020-12-23 00:07:33,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:07:33,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:07:33,546 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-12-23 00:07:33,547 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653785378] [2020-12-23 00:07:33,547 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1790891576] [2020-12-23 00:07:33,547 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 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:07:33,615 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 00:07:33,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:07:33,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-23 00:07:33,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:07:33,689 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-12-23 00:07:33,690 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:07:33,690 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-12-23 00:07:33,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807723986] [2020-12-23 00:07:33,691 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-23 00:07:33,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:07:33,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-23 00:07:33,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-23 00:07:33,692 INFO L87 Difference]: Start difference. First operand 35 states and 41 transitions. Second operand 8 states. [2020-12-23 00:07:33,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:07:33,724 INFO L93 Difference]: Finished difference Result 62 states and 74 transitions. [2020-12-23 00:07:33,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-23 00:07:33,725 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 25 [2020-12-23 00:07:33,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:07:33,729 INFO L225 Difference]: With dead ends: 62 [2020-12-23 00:07:33,730 INFO L226 Difference]: Without dead ends: 38 [2020-12-23 00:07:33,731 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-23 00:07:33,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-12-23 00:07:33,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2020-12-23 00:07:33,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-12-23 00:07:33,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 43 transitions. [2020-12-23 00:07:33,748 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 43 transitions. Word has length 25 [2020-12-23 00:07:33,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:07:33,748 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 43 transitions. [2020-12-23 00:07:33,748 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-23 00:07:33,749 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 43 transitions. [2020-12-23 00:07:33,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-12-23 00:07:33,749 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:07:33,750 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:07:33,950 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:07:33,951 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:07:33,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:07:33,952 INFO L82 PathProgramCache]: Analyzing trace with hash 673889279, now seen corresponding path program 5 times [2020-12-23 00:07:33,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:07:33,953 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568051707] [2020-12-23 00:07:33,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:07:33,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:07:34,033 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-12-23 00:07:34,034 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568051707] [2020-12-23 00:07:34,034 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [846907696] [2020-12-23 00:07:34,034 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 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:07:34,151 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-12-23 00:07:34,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:07:34,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-23 00:07:34,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:07:34,232 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-12-23 00:07:34,232 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:07:34,233 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 12 [2020-12-23 00:07:34,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519669430] [2020-12-23 00:07:34,233 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-23 00:07:34,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:07:34,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-23 00:07:34,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-12-23 00:07:34,235 INFO L87 Difference]: Start difference. First operand 37 states and 43 transitions. Second operand 12 states. [2020-12-23 00:07:34,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:07:34,421 INFO L93 Difference]: Finished difference Result 69 states and 84 transitions. [2020-12-23 00:07:34,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-23 00:07:34,422 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 27 [2020-12-23 00:07:34,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:07:34,423 INFO L225 Difference]: With dead ends: 69 [2020-12-23 00:07:34,423 INFO L226 Difference]: Without dead ends: 45 [2020-12-23 00:07:34,424 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=114, Invalid=192, Unknown=0, NotChecked=0, Total=306 [2020-12-23 00:07:34,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-12-23 00:07:34,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 42. [2020-12-23 00:07:34,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-12-23 00:07:34,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 49 transitions. [2020-12-23 00:07:34,432 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 49 transitions. Word has length 27 [2020-12-23 00:07:34,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:07:34,432 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 49 transitions. [2020-12-23 00:07:34,432 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-23 00:07:34,432 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 49 transitions. [2020-12-23 00:07:34,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-12-23 00:07:34,433 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:07:34,434 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:07:34,647 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:07:34,648 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:07:34,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:07:34,649 INFO L82 PathProgramCache]: Analyzing trace with hash -1905765434, now seen corresponding path program 6 times [2020-12-23 00:07:34,650 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:07:34,651 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484724646] [2020-12-23 00:07:34,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:07:34,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:07:34,751 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-12-23 00:07:34,751 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484724646] [2020-12-23 00:07:34,752 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [489513565] [2020-12-23 00:07:34,752 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:07:34,912 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-12-23 00:07:34,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:07:34,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-23 00:07:34,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:07:35,010 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-12-23 00:07:35,011 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:07:35,011 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 14 [2020-12-23 00:07:35,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145139259] [2020-12-23 00:07:35,012 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-23 00:07:35,012 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:07:35,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-23 00:07:35,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2020-12-23 00:07:35,014 INFO L87 Difference]: Start difference. First operand 42 states and 49 transitions. Second operand 14 states. [2020-12-23 00:07:35,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:07:35,205 INFO L93 Difference]: Finished difference Result 77 states and 94 transitions. [2020-12-23 00:07:35,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-23 00:07:35,207 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 32 [2020-12-23 00:07:35,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:07:35,208 INFO L225 Difference]: With dead ends: 77 [2020-12-23 00:07:35,208 INFO L226 Difference]: Without dead ends: 50 [2020-12-23 00:07:35,209 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=154, Invalid=266, Unknown=0, NotChecked=0, Total=420 [2020-12-23 00:07:35,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-12-23 00:07:35,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 47. [2020-12-23 00:07:35,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-12-23 00:07:35,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 55 transitions. [2020-12-23 00:07:35,216 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 55 transitions. Word has length 32 [2020-12-23 00:07:35,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:07:35,216 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 55 transitions. [2020-12-23 00:07:35,216 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-23 00:07:35,216 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 55 transitions. [2020-12-23 00:07:35,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-12-23 00:07:35,218 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:07:35,218 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:07:35,431 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:07:35,432 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:07:35,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:07:35,433 INFO L82 PathProgramCache]: Analyzing trace with hash 1857202395, now seen corresponding path program 7 times [2020-12-23 00:07:35,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:07:35,434 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562425895] [2020-12-23 00:07:35,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:07:35,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:07:35,536 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-12-23 00:07:35,537 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562425895] [2020-12-23 00:07:35,537 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [346867327] [2020-12-23 00:07:35,537 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:07:35,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:07:35,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-23 00:07:35,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:07:35,700 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-12-23 00:07:35,701 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:07:35,701 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-12-23 00:07:35,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477964467] [2020-12-23 00:07:35,702 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-23 00:07:35,702 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:07:35,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-23 00:07:35,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-23 00:07:35,703 INFO L87 Difference]: Start difference. First operand 47 states and 55 transitions. Second operand 11 states. [2020-12-23 00:07:35,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:07:35,748 INFO L93 Difference]: Finished difference Result 80 states and 96 transitions. [2020-12-23 00:07:35,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-23 00:07:35,749 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 37 [2020-12-23 00:07:35,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:07:35,750 INFO L225 Difference]: With dead ends: 80 [2020-12-23 00:07:35,750 INFO L226 Difference]: Without dead ends: 50 [2020-12-23 00:07:35,751 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-23 00:07:35,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-12-23 00:07:35,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2020-12-23 00:07:35,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-12-23 00:07:35,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 57 transitions. [2020-12-23 00:07:35,760 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 57 transitions. Word has length 37 [2020-12-23 00:07:35,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:07:35,760 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 57 transitions. [2020-12-23 00:07:35,760 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-23 00:07:35,760 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 57 transitions. [2020-12-23 00:07:35,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-12-23 00:07:35,761 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:07:35,762 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:07:35,975 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-12-23 00:07:35,976 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:07:35,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:07:35,977 INFO L82 PathProgramCache]: Analyzing trace with hash 1982442777, now seen corresponding path program 8 times [2020-12-23 00:07:35,978 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:07:35,978 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591411079] [2020-12-23 00:07:35,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:07:36,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:07:36,097 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-12-23 00:07:36,097 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591411079] [2020-12-23 00:07:36,104 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1523715221] [2020-12-23 00:07:36,104 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:07:36,186 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 00:07:36,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:07:36,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-23 00:07:36,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:07:36,257 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-12-23 00:07:36,258 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:07:36,258 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-12-23 00:07:36,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122126975] [2020-12-23 00:07:36,259 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-23 00:07:36,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:07:36,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-23 00:07:36,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-23 00:07:36,260 INFO L87 Difference]: Start difference. First operand 49 states and 57 transitions. Second operand 12 states. [2020-12-23 00:07:36,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:07:36,310 INFO L93 Difference]: Finished difference Result 82 states and 98 transitions. [2020-12-23 00:07:36,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-23 00:07:36,313 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 39 [2020-12-23 00:07:36,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:07:36,314 INFO L225 Difference]: With dead ends: 82 [2020-12-23 00:07:36,317 INFO L226 Difference]: Without dead ends: 52 [2020-12-23 00:07:36,319 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-23 00:07:36,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-12-23 00:07:36,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2020-12-23 00:07:36,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-12-23 00:07:36,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 59 transitions. [2020-12-23 00:07:36,335 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 59 transitions. Word has length 39 [2020-12-23 00:07:36,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:07:36,336 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 59 transitions. [2020-12-23 00:07:36,336 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-23 00:07:36,336 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 59 transitions. [2020-12-23 00:07:36,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-12-23 00:07:36,340 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:07:36,340 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:07:36,555 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2020-12-23 00:07:36,556 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:07:36,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:07:36,557 INFO L82 PathProgramCache]: Analyzing trace with hash 2079365591, now seen corresponding path program 9 times [2020-12-23 00:07:36,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:07:36,558 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066313874] [2020-12-23 00:07:36,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:07:36,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:07:36,726 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-12-23 00:07:36,727 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066313874] [2020-12-23 00:07:36,727 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [529997967] [2020-12-23 00:07:36,727 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:07:36,841 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-12-23 00:07:36,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:07:36,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-23 00:07:36,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:07:36,990 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2020-12-23 00:07:36,991 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:07:36,991 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 18 [2020-12-23 00:07:36,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93748614] [2020-12-23 00:07:36,992 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-23 00:07:36,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:07:36,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-23 00:07:36,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=213, Unknown=0, NotChecked=0, Total=306 [2020-12-23 00:07:36,993 INFO L87 Difference]: Start difference. First operand 51 states and 59 transitions. Second operand 18 states. [2020-12-23 00:07:37,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:07:37,289 INFO L93 Difference]: Finished difference Result 89 states and 108 transitions. [2020-12-23 00:07:37,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-23 00:07:37,290 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 41 [2020-12-23 00:07:37,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:07:37,291 INFO L225 Difference]: With dead ends: 89 [2020-12-23 00:07:37,291 INFO L226 Difference]: Without dead ends: 59 [2020-12-23 00:07:37,292 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=273, Invalid=483, Unknown=0, NotChecked=0, Total=756 [2020-12-23 00:07:37,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-12-23 00:07:37,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 56. [2020-12-23 00:07:37,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-12-23 00:07:37,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 65 transitions. [2020-12-23 00:07:37,298 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 65 transitions. Word has length 41 [2020-12-23 00:07:37,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:07:37,299 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 65 transitions. [2020-12-23 00:07:37,299 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-23 00:07:37,299 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 65 transitions. [2020-12-23 00:07:37,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-12-23 00:07:37,300 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:07:37,300 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:07:37,513 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:07:37,514 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:07:37,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:07:37,515 INFO L82 PathProgramCache]: Analyzing trace with hash -1197294738, now seen corresponding path program 10 times [2020-12-23 00:07:37,516 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:07:37,516 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470136367] [2020-12-23 00:07:37,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:07:37,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:07:37,691 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2020-12-23 00:07:37,692 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470136367] [2020-12-23 00:07:37,692 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [958592239] [2020-12-23 00:07:37,692 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:07:37,796 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 00:07:37,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:07:37,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-23 00:07:37,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:07:37,872 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2020-12-23 00:07:37,872 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:07:37,872 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-12-23 00:07:37,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467521969] [2020-12-23 00:07:37,873 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-23 00:07:37,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:07:37,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-23 00:07:37,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-12-23 00:07:37,874 INFO L87 Difference]: Start difference. First operand 56 states and 65 transitions. Second operand 14 states. [2020-12-23 00:07:37,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:07:37,927 INFO L93 Difference]: Finished difference Result 92 states and 110 transitions. [2020-12-23 00:07:37,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-23 00:07:37,927 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 46 [2020-12-23 00:07:37,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:07:37,928 INFO L225 Difference]: With dead ends: 92 [2020-12-23 00:07:37,928 INFO L226 Difference]: Without dead ends: 59 [2020-12-23 00:07:37,929 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-12-23 00:07:37,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-12-23 00:07:37,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 58. [2020-12-23 00:07:37,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-12-23 00:07:37,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 67 transitions. [2020-12-23 00:07:37,935 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 67 transitions. Word has length 46 [2020-12-23 00:07:37,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:07:37,935 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 67 transitions. [2020-12-23 00:07:37,936 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-23 00:07:37,936 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 67 transitions. [2020-12-23 00:07:37,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-12-23 00:07:37,937 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:07:37,937 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:07:38,152 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:07:38,153 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:07:38,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:07:38,154 INFO L82 PathProgramCache]: Analyzing trace with hash 1989778672, now seen corresponding path program 11 times [2020-12-23 00:07:38,154 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:07:38,155 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901252962] [2020-12-23 00:07:38,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:07:38,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:07:38,390 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2020-12-23 00:07:38,390 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901252962] [2020-12-23 00:07:38,391 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [754317709] [2020-12-23 00:07:38,391 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 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:07:38,987 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-12-23 00:07:38,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:07:38,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 00:07:38,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:07:39,066 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2020-12-23 00:07:39,066 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:07:39,066 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-12-23 00:07:39,073 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378485095] [2020-12-23 00:07:39,074 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-23 00:07:39,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:07:39,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-23 00:07:39,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-12-23 00:07:39,075 INFO L87 Difference]: Start difference. First operand 58 states and 67 transitions. Second operand 15 states. [2020-12-23 00:07:39,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:07:39,133 INFO L93 Difference]: Finished difference Result 94 states and 112 transitions. [2020-12-23 00:07:39,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-23 00:07:39,133 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 48 [2020-12-23 00:07:39,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:07:39,134 INFO L225 Difference]: With dead ends: 94 [2020-12-23 00:07:39,134 INFO L226 Difference]: Without dead ends: 61 [2020-12-23 00:07:39,136 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-12-23 00:07:39,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-12-23 00:07:39,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 60. [2020-12-23 00:07:39,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-12-23 00:07:39,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 69 transitions. [2020-12-23 00:07:39,157 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 69 transitions. Word has length 48 [2020-12-23 00:07:39,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:07:39,157 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 69 transitions. [2020-12-23 00:07:39,157 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-23 00:07:39,157 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 69 transitions. [2020-12-23 00:07:39,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-12-23 00:07:39,159 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:07:39,159 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:07:39,360 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-23 00:07:39,360 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:07:39,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:07:39,361 INFO L82 PathProgramCache]: Analyzing trace with hash -1839323662, now seen corresponding path program 12 times [2020-12-23 00:07:39,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:07:39,362 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935937699] [2020-12-23 00:07:39,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:07:39,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:07:39,525 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2020-12-23 00:07:39,525 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935937699] [2020-12-23 00:07:39,526 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1257526593] [2020-12-23 00:07:39,526 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:07:40,232 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-12-23 00:07:40,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:07:40,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-23 00:07:40,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:07:40,431 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2020-12-23 00:07:40,432 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:07:40,432 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9] total 22 [2020-12-23 00:07:40,432 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380883764] [2020-12-23 00:07:40,433 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-23 00:07:40,433 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:07:40,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-23 00:07:40,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=322, Unknown=0, NotChecked=0, Total=462 [2020-12-23 00:07:40,434 INFO L87 Difference]: Start difference. First operand 60 states and 69 transitions. Second operand 22 states. [2020-12-23 00:07:40,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:07:40,773 INFO L93 Difference]: Finished difference Result 101 states and 122 transitions. [2020-12-23 00:07:40,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-23 00:07:40,774 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 50 [2020-12-23 00:07:40,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:07:40,775 INFO L225 Difference]: With dead ends: 101 [2020-12-23 00:07:40,775 INFO L226 Difference]: Without dead ends: 68 [2020-12-23 00:07:40,776 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=426, Invalid=764, Unknown=0, NotChecked=0, Total=1190 [2020-12-23 00:07:40,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-12-23 00:07:40,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 65. [2020-12-23 00:07:40,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-12-23 00:07:40,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 75 transitions. [2020-12-23 00:07:40,781 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 75 transitions. Word has length 50 [2020-12-23 00:07:40,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:07:40,781 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 75 transitions. [2020-12-23 00:07:40,781 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-23 00:07:40,781 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 75 transitions. [2020-12-23 00:07:40,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-12-23 00:07:40,782 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:07:40,782 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:07:40,995 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-12-23 00:07:40,996 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:07:40,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:07:40,997 INFO L82 PathProgramCache]: Analyzing trace with hash 1995662255, now seen corresponding path program 13 times [2020-12-23 00:07:40,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:07:40,997 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880818407] [2020-12-23 00:07:40,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:07:41,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:07:41,172 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-12-23 00:07:41,172 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880818407] [2020-12-23 00:07:41,172 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [104506074] [2020-12-23 00:07:41,172 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:07:41,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:07:41,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-23 00:07:41,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:07:41,339 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-12-23 00:07:41,339 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:07:41,340 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-12-23 00:07:41,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883501761] [2020-12-23 00:07:41,340 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 00:07:41,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:07:41,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 00:07:41,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-12-23 00:07:41,342 INFO L87 Difference]: Start difference. First operand 65 states and 75 transitions. Second operand 17 states. [2020-12-23 00:07:41,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:07:41,402 INFO L93 Difference]: Finished difference Result 104 states and 124 transitions. [2020-12-23 00:07:41,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-23 00:07:41,403 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 55 [2020-12-23 00:07:41,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:07:41,403 INFO L225 Difference]: With dead ends: 104 [2020-12-23 00:07:41,403 INFO L226 Difference]: Without dead ends: 68 [2020-12-23 00:07:41,404 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-12-23 00:07:41,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-12-23 00:07:41,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 67. [2020-12-23 00:07:41,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-12-23 00:07:41,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 77 transitions. [2020-12-23 00:07:41,409 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 77 transitions. Word has length 55 [2020-12-23 00:07:41,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:07:41,409 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 77 transitions. [2020-12-23 00:07:41,409 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 00:07:41,409 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 77 transitions. [2020-12-23 00:07:41,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-12-23 00:07:41,410 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:07:41,410 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:07:41,625 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-12-23 00:07:41,626 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:07:41,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:07:41,626 INFO L82 PathProgramCache]: Analyzing trace with hash -1485499283, now seen corresponding path program 14 times [2020-12-23 00:07:41,627 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:07:41,627 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224386379] [2020-12-23 00:07:41,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:07:41,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:07:41,858 INFO L134 CoverageAnalysis]: Checked inductivity of 266 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-12-23 00:07:41,858 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224386379] [2020-12-23 00:07:41,858 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [161297204] [2020-12-23 00:07:41,859 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:07:41,937 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 00:07:41,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:07:41,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-23 00:07:41,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:07:42,041 INFO L134 CoverageAnalysis]: Checked inductivity of 266 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-12-23 00:07:42,042 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:07:42,045 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-12-23 00:07:42,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558040909] [2020-12-23 00:07:42,046 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-23 00:07:42,046 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:07:42,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-23 00:07:42,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-12-23 00:07:42,048 INFO L87 Difference]: Start difference. First operand 67 states and 77 transitions. Second operand 18 states. [2020-12-23 00:07:42,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:07:42,108 INFO L93 Difference]: Finished difference Result 106 states and 126 transitions. [2020-12-23 00:07:42,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-23 00:07:42,109 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 57 [2020-12-23 00:07:42,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:07:42,109 INFO L225 Difference]: With dead ends: 106 [2020-12-23 00:07:42,110 INFO L226 Difference]: Without dead ends: 70 [2020-12-23 00:07:42,110 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-12-23 00:07:42,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-12-23 00:07:42,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 69. [2020-12-23 00:07:42,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-12-23 00:07:42,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 79 transitions. [2020-12-23 00:07:42,115 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 79 transitions. Word has length 57 [2020-12-23 00:07:42,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:07:42,115 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 79 transitions. [2020-12-23 00:07:42,115 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-23 00:07:42,116 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 79 transitions. [2020-12-23 00:07:42,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-12-23 00:07:42,116 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:07:42,116 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:07:42,329 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:07:42,330 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:07:42,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:07:42,331 INFO L82 PathProgramCache]: Analyzing trace with hash -1102213717, now seen corresponding path program 15 times [2020-12-23 00:07:42,331 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:07:42,331 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493454190] [2020-12-23 00:07:42,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:07:42,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:07:42,552 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-12-23 00:07:42,552 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493454190] [2020-12-23 00:07:42,552 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1663684774] [2020-12-23 00:07:42,553 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:07:42,728 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-12-23 00:07:42,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:07:42,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-23 00:07:42,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:07:42,950 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2020-12-23 00:07:42,951 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:07:42,951 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 10] total 26 [2020-12-23 00:07:42,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193875265] [2020-12-23 00:07:42,952 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-12-23 00:07:42,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:07:42,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-12-23 00:07:42,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=453, Unknown=0, NotChecked=0, Total=650 [2020-12-23 00:07:42,953 INFO L87 Difference]: Start difference. First operand 69 states and 79 transitions. Second operand 26 states. [2020-12-23 00:07:43,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:07:43,370 INFO L93 Difference]: Finished difference Result 113 states and 136 transitions. [2020-12-23 00:07:43,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-23 00:07:43,375 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 59 [2020-12-23 00:07:43,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:07:43,376 INFO L225 Difference]: With dead ends: 113 [2020-12-23 00:07:43,376 INFO L226 Difference]: Without dead ends: 77 [2020-12-23 00:07:43,377 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=613, Invalid=1109, Unknown=0, NotChecked=0, Total=1722 [2020-12-23 00:07:43,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-12-23 00:07:43,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 74. [2020-12-23 00:07:43,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-12-23 00:07:43,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 85 transitions. [2020-12-23 00:07:43,382 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 85 transitions. Word has length 59 [2020-12-23 00:07:43,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:07:43,382 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 85 transitions. [2020-12-23 00:07:43,382 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-12-23 00:07:43,382 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 85 transitions. [2020-12-23 00:07:43,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-23 00:07:43,383 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:07:43,383 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:07:43,596 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-23 00:07:43,597 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:07:43,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:07:43,598 INFO L82 PathProgramCache]: Analyzing trace with hash 705661594, now seen corresponding path program 16 times [2020-12-23 00:07:43,598 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:07:43,598 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440238944] [2020-12-23 00:07:43,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:07:43,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:07:43,861 INFO L134 CoverageAnalysis]: Checked inductivity of 348 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2020-12-23 00:07:43,861 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440238944] [2020-12-23 00:07:43,861 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2067450994] [2020-12-23 00:07:43,862 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:07:43,985 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 00:07:43,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:07:43,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-23 00:07:43,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:07:44,079 INFO L134 CoverageAnalysis]: Checked inductivity of 348 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2020-12-23 00:07:44,080 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:07:44,080 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-12-23 00:07:44,080 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827739987] [2020-12-23 00:07:44,081 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-23 00:07:44,081 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:07:44,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-23 00:07:44,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-12-23 00:07:44,082 INFO L87 Difference]: Start difference. First operand 74 states and 85 transitions. Second operand 20 states. [2020-12-23 00:07:44,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:07:44,154 INFO L93 Difference]: Finished difference Result 116 states and 138 transitions. [2020-12-23 00:07:44,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-23 00:07:44,155 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 64 [2020-12-23 00:07:44,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:07:44,156 INFO L225 Difference]: With dead ends: 116 [2020-12-23 00:07:44,156 INFO L226 Difference]: Without dead ends: 77 [2020-12-23 00:07:44,156 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-12-23 00:07:44,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-12-23 00:07:44,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 76. [2020-12-23 00:07:44,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-12-23 00:07:44,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 87 transitions. [2020-12-23 00:07:44,161 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 87 transitions. Word has length 64 [2020-12-23 00:07:44,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:07:44,161 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 87 transitions. [2020-12-23 00:07:44,161 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-23 00:07:44,161 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 87 transitions. [2020-12-23 00:07:44,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-23 00:07:44,162 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:07:44,162 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:07:44,375 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:07:44,375 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:07:44,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:07:44,376 INFO L82 PathProgramCache]: Analyzing trace with hash -956969060, now seen corresponding path program 17 times [2020-12-23 00:07:44,376 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:07:44,377 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24739733] [2020-12-23 00:07:44,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:07:44,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:07:44,667 INFO L134 CoverageAnalysis]: Checked inductivity of 381 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2020-12-23 00:07:44,668 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24739733] [2020-12-23 00:07:44,668 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1030212041] [2020-12-23 00:07:44,668 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:07:47,723 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2020-12-23 00:07:47,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:07:47,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-23 00:07:47,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:07:47,842 INFO L134 CoverageAnalysis]: Checked inductivity of 381 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2020-12-23 00:07:47,842 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:07:47,842 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-12-23 00:07:47,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719952157] [2020-12-23 00:07:47,844 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-23 00:07:47,844 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:07:47,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-23 00:07:47,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-12-23 00:07:47,846 INFO L87 Difference]: Start difference. First operand 76 states and 87 transitions. Second operand 21 states. [2020-12-23 00:07:47,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:07:47,927 INFO L93 Difference]: Finished difference Result 118 states and 140 transitions. [2020-12-23 00:07:47,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-23 00:07:47,928 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 66 [2020-12-23 00:07:47,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:07:47,929 INFO L225 Difference]: With dead ends: 118 [2020-12-23 00:07:47,929 INFO L226 Difference]: Without dead ends: 79 [2020-12-23 00:07:47,930 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-12-23 00:07:47,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-12-23 00:07:47,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 78. [2020-12-23 00:07:47,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-12-23 00:07:47,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 89 transitions. [2020-12-23 00:07:47,934 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 89 transitions. Word has length 66 [2020-12-23 00:07:47,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:07:47,935 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 89 transitions. [2020-12-23 00:07:47,935 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-23 00:07:47,935 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 89 transitions. [2020-12-23 00:07:47,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-12-23 00:07:47,936 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:07:47,936 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:07:48,146 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:07:48,147 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:07:48,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:07:48,148 INFO L82 PathProgramCache]: Analyzing trace with hash -1017193442, now seen corresponding path program 18 times [2020-12-23 00:07:48,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:07:48,149 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137208835] [2020-12-23 00:07:48,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:07:48,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:07:48,478 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2020-12-23 00:07:48,479 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137208835] [2020-12-23 00:07:48,479 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1471943704] [2020-12-23 00:07:48,479 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 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:07:49,879 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2020-12-23 00:07:49,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:07:49,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-23 00:07:49,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:07:50,114 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2020-12-23 00:07:50,115 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:07:50,115 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 11] total 30 [2020-12-23 00:07:50,115 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687462269] [2020-12-23 00:07:50,115 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-12-23 00:07:50,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:07:50,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-12-23 00:07:50,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=264, Invalid=606, Unknown=0, NotChecked=0, Total=870 [2020-12-23 00:07:50,117 INFO L87 Difference]: Start difference. First operand 78 states and 89 transitions. Second operand 30 states. [2020-12-23 00:07:50,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:07:50,676 INFO L93 Difference]: Finished difference Result 125 states and 150 transitions. [2020-12-23 00:07:50,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-12-23 00:07:50,677 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 68 [2020-12-23 00:07:50,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:07:50,678 INFO L225 Difference]: With dead ends: 125 [2020-12-23 00:07:50,678 INFO L226 Difference]: Without dead ends: 86 [2020-12-23 00:07:50,679 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 333 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=834, Invalid=1518, Unknown=0, NotChecked=0, Total=2352 [2020-12-23 00:07:50,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-12-23 00:07:50,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 83. [2020-12-23 00:07:50,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-12-23 00:07:50,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 95 transitions. [2020-12-23 00:07:50,683 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 95 transitions. Word has length 68 [2020-12-23 00:07:50,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:07:50,684 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 95 transitions. [2020-12-23 00:07:50,684 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-12-23 00:07:50,684 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 95 transitions. [2020-12-23 00:07:50,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-12-23 00:07:50,685 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:07:50,685 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:07:50,899 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-12-23 00:07:50,900 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:07:50,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:07:50,901 INFO L82 PathProgramCache]: Analyzing trace with hash 1139055235, now seen corresponding path program 19 times [2020-12-23 00:07:50,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:07:50,901 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819068611] [2020-12-23 00:07:50,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:07:50,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:07:51,216 INFO L134 CoverageAnalysis]: Checked inductivity of 478 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2020-12-23 00:07:51,217 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819068611] [2020-12-23 00:07:51,217 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1874347233] [2020-12-23 00:07:51,217 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:07:51,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:07:51,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-23 00:07:51,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:07:51,388 INFO L134 CoverageAnalysis]: Checked inductivity of 478 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2020-12-23 00:07:51,388 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:07:51,388 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-12-23 00:07:51,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290315763] [2020-12-23 00:07:51,389 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-23 00:07:51,389 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:07:51,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-23 00:07:51,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-12-23 00:07:51,390 INFO L87 Difference]: Start difference. First operand 83 states and 95 transitions. Second operand 23 states. [2020-12-23 00:07:51,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:07:51,461 INFO L93 Difference]: Finished difference Result 128 states and 152 transitions. [2020-12-23 00:07:51,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-23 00:07:51,464 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 73 [2020-12-23 00:07:51,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:07:51,465 INFO L225 Difference]: With dead ends: 128 [2020-12-23 00:07:51,465 INFO L226 Difference]: Without dead ends: 86 [2020-12-23 00:07:51,466 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-12-23 00:07:51,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-12-23 00:07:51,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2020-12-23 00:07:51,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-12-23 00:07:51,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 97 transitions. [2020-12-23 00:07:51,469 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 97 transitions. Word has length 73 [2020-12-23 00:07:51,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:07:51,469 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 97 transitions. [2020-12-23 00:07:51,469 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-23 00:07:51,469 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 97 transitions. [2020-12-23 00:07:51,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-12-23 00:07:51,470 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:07:51,470 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:07:51,670 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:07:51,671 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:07:51,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:07:51,672 INFO L82 PathProgramCache]: Analyzing trace with hash 2110707649, now seen corresponding path program 20 times [2020-12-23 00:07:51,672 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:07:51,672 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482384088] [2020-12-23 00:07:51,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:07:51,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:07:52,033 INFO L134 CoverageAnalysis]: Checked inductivity of 517 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2020-12-23 00:07:52,034 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482384088] [2020-12-23 00:07:52,034 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [689769653] [2020-12-23 00:07:52,034 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:07:52,125 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 00:07:52,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:07:52,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 22 conjunts are in the unsatisfiable core [2020-12-23 00:07:52,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:07:52,240 INFO L134 CoverageAnalysis]: Checked inductivity of 517 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2020-12-23 00:07:52,240 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:07:52,240 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-12-23 00:07:52,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27383559] [2020-12-23 00:07:52,241 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-12-23 00:07:52,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:07:52,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-12-23 00:07:52,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2020-12-23 00:07:52,242 INFO L87 Difference]: Start difference. First operand 85 states and 97 transitions. Second operand 24 states. [2020-12-23 00:07:52,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:07:52,323 INFO L93 Difference]: Finished difference Result 130 states and 154 transitions. [2020-12-23 00:07:52,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-12-23 00:07:52,324 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 75 [2020-12-23 00:07:52,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:07:52,325 INFO L225 Difference]: With dead ends: 130 [2020-12-23 00:07:52,325 INFO L226 Difference]: Without dead ends: 88 [2020-12-23 00:07:52,325 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2020-12-23 00:07:52,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-12-23 00:07:52,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 87. [2020-12-23 00:07:52,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-12-23 00:07:52,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 99 transitions. [2020-12-23 00:07:52,330 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 99 transitions. Word has length 75 [2020-12-23 00:07:52,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:07:52,330 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 99 transitions. [2020-12-23 00:07:52,330 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-12-23 00:07:52,330 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 99 transitions. [2020-12-23 00:07:52,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-12-23 00:07:52,331 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:07:52,331 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:07:52,544 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-12-23 00:07:52,545 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:07:52,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:07:52,546 INFO L82 PathProgramCache]: Analyzing trace with hash -434193025, now seen corresponding path program 21 times [2020-12-23 00:07:52,546 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:07:52,546 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098635668] [2020-12-23 00:07:52,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:07:52,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:07:52,909 INFO L134 CoverageAnalysis]: Checked inductivity of 558 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2020-12-23 00:07:52,910 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098635668] [2020-12-23 00:07:52,910 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [469292617] [2020-12-23 00:07:52,910 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:07:53,789 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-12-23 00:07:53,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:07:53,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-23 00:07:53,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:07:54,069 INFO L134 CoverageAnalysis]: Checked inductivity of 558 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 441 trivial. 0 not checked. [2020-12-23 00:07:54,070 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:07:54,070 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 12] total 34 [2020-12-23 00:07:54,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413237386] [2020-12-23 00:07:54,071 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-12-23 00:07:54,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:07:54,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-12-23 00:07:54,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=341, Invalid=781, Unknown=0, NotChecked=0, Total=1122 [2020-12-23 00:07:54,073 INFO L87 Difference]: Start difference. First operand 87 states and 99 transitions. Second operand 34 states. [2020-12-23 00:07:54,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:07:54,714 INFO L93 Difference]: Finished difference Result 137 states and 164 transitions. [2020-12-23 00:07:54,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-12-23 00:07:54,715 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 77 [2020-12-23 00:07:54,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:07:54,715 INFO L225 Difference]: With dead ends: 137 [2020-12-23 00:07:54,716 INFO L226 Difference]: Without dead ends: 95 [2020-12-23 00:07:54,717 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1089, Invalid=1991, Unknown=0, NotChecked=0, Total=3080 [2020-12-23 00:07:54,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-12-23 00:07:54,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 92. [2020-12-23 00:07:54,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-12-23 00:07:54,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 105 transitions. [2020-12-23 00:07:54,721 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 105 transitions. Word has length 77 [2020-12-23 00:07:54,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:07:54,721 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 105 transitions. [2020-12-23 00:07:54,722 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-12-23 00:07:54,722 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 105 transitions. [2020-12-23 00:07:54,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-12-23 00:07:54,723 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:07:54,723 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:07:54,936 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-12-23 00:07:54,937 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:07:54,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:07:54,938 INFO L82 PathProgramCache]: Analyzing trace with hash -518734394, now seen corresponding path program 22 times [2020-12-23 00:07:54,938 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:07:54,938 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016809940] [2020-12-23 00:07:54,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:07:54,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:07:55,321 INFO L134 CoverageAnalysis]: Checked inductivity of 629 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2020-12-23 00:07:55,322 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016809940] [2020-12-23 00:07:55,324 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [921226771] [2020-12-23 00:07:55,324 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 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:07:55,515 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 00:07:55,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:07:55,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 24 conjunts are in the unsatisfiable core [2020-12-23 00:07:55,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:07:55,616 INFO L134 CoverageAnalysis]: Checked inductivity of 629 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2020-12-23 00:07:55,616 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:07:55,617 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-12-23 00:07:55,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672381686] [2020-12-23 00:07:55,617 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-12-23 00:07:55,617 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:07:55,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-12-23 00:07:55,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2020-12-23 00:07:55,618 INFO L87 Difference]: Start difference. First operand 92 states and 105 transitions. Second operand 26 states. [2020-12-23 00:07:55,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:07:55,711 INFO L93 Difference]: Finished difference Result 140 states and 166 transitions. [2020-12-23 00:07:55,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-23 00:07:55,711 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 82 [2020-12-23 00:07:55,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:07:55,712 INFO L225 Difference]: With dead ends: 140 [2020-12-23 00:07:55,712 INFO L226 Difference]: Without dead ends: 95 [2020-12-23 00:07:55,713 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2020-12-23 00:07:55,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-12-23 00:07:55,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 94. [2020-12-23 00:07:55,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-12-23 00:07:55,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 107 transitions. [2020-12-23 00:07:55,717 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 107 transitions. Word has length 82 [2020-12-23 00:07:55,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:07:55,717 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 107 transitions. [2020-12-23 00:07:55,717 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-12-23 00:07:55,717 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 107 transitions. [2020-12-23 00:07:55,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-12-23 00:07:55,718 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:07:55,719 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:07:55,931 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:07:55,931 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:07:55,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:07:55,933 INFO L82 PathProgramCache]: Analyzing trace with hash -668432824, now seen corresponding path program 23 times [2020-12-23 00:07:55,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:07:55,933 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529496793] [2020-12-23 00:07:55,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:07:55,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:07:56,369 INFO L134 CoverageAnalysis]: Checked inductivity of 674 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2020-12-23 00:07:56,370 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529496793] [2020-12-23 00:07:56,370 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [209016482] [2020-12-23 00:07:56,370 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:08:14,665 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2020-12-23 00:08:14,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:08:14,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-23 00:08:14,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:08:15,038 INFO L134 CoverageAnalysis]: Checked inductivity of 674 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 529 trivial. 0 not checked. [2020-12-23 00:08:15,038 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:08:15,038 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 13] total 37 [2020-12-23 00:08:15,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492347409] [2020-12-23 00:08:15,039 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-12-23 00:08:15,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:08:15,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-12-23 00:08:15,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=402, Invalid=930, Unknown=0, NotChecked=0, Total=1332 [2020-12-23 00:08:15,040 INFO L87 Difference]: Start difference. First operand 94 states and 107 transitions. Second operand 37 states. [2020-12-23 00:08:15,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:08:15,847 INFO L93 Difference]: Finished difference Result 147 states and 176 transitions. [2020-12-23 00:08:15,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-12-23 00:08:15,848 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 84 [2020-12-23 00:08:15,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:08:15,849 INFO L225 Difference]: With dead ends: 147 [2020-12-23 00:08:15,849 INFO L226 Difference]: Without dead ends: 102 [2020-12-23 00:08:15,851 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 529 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1290, Invalid=2370, Unknown=0, NotChecked=0, Total=3660 [2020-12-23 00:08:15,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-12-23 00:08:15,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 99. [2020-12-23 00:08:15,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-12-23 00:08:15,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 113 transitions. [2020-12-23 00:08:15,854 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 113 transitions. Word has length 84 [2020-12-23 00:08:15,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:08:15,855 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 113 transitions. [2020-12-23 00:08:15,855 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-12-23 00:08:15,855 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 113 transitions. [2020-12-23 00:08:15,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-12-23 00:08:15,856 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:08:15,856 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:08:16,056 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-12-23 00:08:16,057 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:08:16,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:08:16,058 INFO L82 PathProgramCache]: Analyzing trace with hash 1249938457, now seen corresponding path program 24 times [2020-12-23 00:08:16,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:08:16,058 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758058501] [2020-12-23 00:08:16,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:08:16,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:08:16,474 INFO L134 CoverageAnalysis]: Checked inductivity of 752 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2020-12-23 00:08:16,475 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758058501] [2020-12-23 00:08:16,475 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [49722730] [2020-12-23 00:08:16,475 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 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:08:30,904 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 23 check-sat command(s) [2020-12-23 00:08:30,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:08:30,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 00:08:30,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:08:31,287 INFO L134 CoverageAnalysis]: Checked inductivity of 752 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 576 trivial. 0 not checked. [2020-12-23 00:08:31,288 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:08:31,288 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 14] total 39 [2020-12-23 00:08:31,288 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816186109] [2020-12-23 00:08:31,288 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-12-23 00:08:31,289 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:08:31,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-12-23 00:08:31,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=441, Invalid=1041, Unknown=0, NotChecked=0, Total=1482 [2020-12-23 00:08:31,290 INFO L87 Difference]: Start difference. First operand 99 states and 113 transitions. Second operand 39 states. [2020-12-23 00:08:32,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:08:32,169 INFO L93 Difference]: Finished difference Result 155 states and 186 transitions. [2020-12-23 00:08:32,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-12-23 00:08:32,170 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 89 [2020-12-23 00:08:32,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:08:32,171 INFO L225 Difference]: With dead ends: 155 [2020-12-23 00:08:32,171 INFO L226 Difference]: Without dead ends: 107 [2020-12-23 00:08:32,173 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 588 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1416, Invalid=2616, Unknown=0, NotChecked=0, Total=4032 [2020-12-23 00:08:32,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-12-23 00:08:32,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 104. [2020-12-23 00:08:32,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-12-23 00:08:32,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 119 transitions. [2020-12-23 00:08:32,177 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 119 transitions. Word has length 89 [2020-12-23 00:08:32,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:08:32,178 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 119 transitions. [2020-12-23 00:08:32,178 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-12-23 00:08:32,178 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 119 transitions. [2020-12-23 00:08:32,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-12-23 00:08:32,179 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:08:32,179 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:08:32,392 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:08:32,393 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:08:32,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:08:32,394 INFO L82 PathProgramCache]: Analyzing trace with hash -1156923924, now seen corresponding path program 25 times [2020-12-23 00:08:32,394 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:08:32,394 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459024219] [2020-12-23 00:08:32,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:08:32,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:08:32,935 INFO L134 CoverageAnalysis]: Checked inductivity of 835 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2020-12-23 00:08:32,936 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459024219] [2020-12-23 00:08:32,936 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1259513071] [2020-12-23 00:08:32,936 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 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:08:33,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:08:33,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 27 conjunts are in the unsatisfiable core [2020-12-23 00:08:33,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:08:33,147 INFO L134 CoverageAnalysis]: Checked inductivity of 835 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2020-12-23 00:08:33,147 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:08:33,148 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2020-12-23 00:08:33,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898950370] [2020-12-23 00:08:33,148 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-12-23 00:08:33,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:08:33,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-12-23 00:08:33,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2020-12-23 00:08:33,149 INFO L87 Difference]: Start difference. First operand 104 states and 119 transitions. Second operand 29 states. [2020-12-23 00:08:33,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:08:33,264 INFO L93 Difference]: Finished difference Result 158 states and 188 transitions. [2020-12-23 00:08:33,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-12-23 00:08:33,265 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 94 [2020-12-23 00:08:33,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:08:33,266 INFO L225 Difference]: With dead ends: 158 [2020-12-23 00:08:33,266 INFO L226 Difference]: Without dead ends: 107 [2020-12-23 00:08:33,266 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2020-12-23 00:08:33,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-12-23 00:08:33,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 106. [2020-12-23 00:08:33,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-12-23 00:08:33,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 121 transitions. [2020-12-23 00:08:33,270 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 121 transitions. Word has length 94 [2020-12-23 00:08:33,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:08:33,271 INFO L481 AbstractCegarLoop]: Abstraction has 106 states and 121 transitions. [2020-12-23 00:08:33,271 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-12-23 00:08:33,271 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 121 transitions. [2020-12-23 00:08:33,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-12-23 00:08:33,272 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:08:33,272 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:08:33,485 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-12-23 00:08:33,486 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:08:33,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:08:33,486 INFO L82 PathProgramCache]: Analyzing trace with hash 691786606, now seen corresponding path program 26 times [2020-12-23 00:08:33,487 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:08:33,487 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103537285] [2020-12-23 00:08:33,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:08:33,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:08:34,035 INFO L134 CoverageAnalysis]: Checked inductivity of 886 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2020-12-23 00:08:34,036 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103537285] [2020-12-23 00:08:34,036 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [239717328] [2020-12-23 00:08:34,036 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:08:34,140 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 00:08:34,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:08:34,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 28 conjunts are in the unsatisfiable core [2020-12-23 00:08:34,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:08:34,270 INFO L134 CoverageAnalysis]: Checked inductivity of 886 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2020-12-23 00:08:34,271 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:08:34,271 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2020-12-23 00:08:34,271 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216474337] [2020-12-23 00:08:34,271 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-12-23 00:08:34,271 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:08:34,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-12-23 00:08:34,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2020-12-23 00:08:34,273 INFO L87 Difference]: Start difference. First operand 106 states and 121 transitions. Second operand 30 states. [2020-12-23 00:08:34,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:08:34,378 INFO L93 Difference]: Finished difference Result 160 states and 190 transitions. [2020-12-23 00:08:34,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-12-23 00:08:34,379 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 96 [2020-12-23 00:08:34,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:08:34,380 INFO L225 Difference]: With dead ends: 160 [2020-12-23 00:08:34,380 INFO L226 Difference]: Without dead ends: 109 [2020-12-23 00:08:34,380 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2020-12-23 00:08:34,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-12-23 00:08:34,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 108. [2020-12-23 00:08:34,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-12-23 00:08:34,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 123 transitions. [2020-12-23 00:08:34,384 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 123 transitions. Word has length 96 [2020-12-23 00:08:34,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:08:34,385 INFO L481 AbstractCegarLoop]: Abstraction has 108 states and 123 transitions. [2020-12-23 00:08:34,385 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-12-23 00:08:34,385 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 123 transitions. [2020-12-23 00:08:34,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-12-23 00:08:34,386 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:08:34,386 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:08:34,599 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-12-23 00:08:34,600 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:08:34,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:08:34,601 INFO L82 PathProgramCache]: Analyzing trace with hash -813854608, now seen corresponding path program 27 times [2020-12-23 00:08:34,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:08:34,601 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989800962] [2020-12-23 00:08:34,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:08:34,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:08:35,199 INFO L134 CoverageAnalysis]: Checked inductivity of 939 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2020-12-23 00:08:35,199 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989800962] [2020-12-23 00:08:35,200 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [353824276] [2020-12-23 00:08:35,200 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:08:36,681 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2020-12-23 00:08:36,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:08:36,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-23 00:08:36,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:08:37,156 INFO L134 CoverageAnalysis]: Checked inductivity of 939 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 729 trivial. 0 not checked. [2020-12-23 00:08:37,157 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:08:37,157 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 15] total 43 [2020-12-23 00:08:37,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205824662] [2020-12-23 00:08:37,157 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-12-23 00:08:37,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:08:37,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-12-23 00:08:37,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=539, Invalid=1267, Unknown=0, NotChecked=0, Total=1806 [2020-12-23 00:08:37,159 INFO L87 Difference]: Start difference. First operand 108 states and 123 transitions. Second operand 43 states. [2020-12-23 00:08:38,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:08:38,208 INFO L93 Difference]: Finished difference Result 167 states and 200 transitions. [2020-12-23 00:08:38,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-12-23 00:08:38,208 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 98 [2020-12-23 00:08:38,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:08:38,209 INFO L225 Difference]: With dead ends: 167 [2020-12-23 00:08:38,210 INFO L226 Difference]: Without dead ends: 116 [2020-12-23 00:08:38,212 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 729 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1743, Invalid=3227, Unknown=0, NotChecked=0, Total=4970 [2020-12-23 00:08:38,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-12-23 00:08:38,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 113. [2020-12-23 00:08:38,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-12-23 00:08:38,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 129 transitions. [2020-12-23 00:08:38,216 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 129 transitions. Word has length 98 [2020-12-23 00:08:38,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:08:38,217 INFO L481 AbstractCegarLoop]: Abstraction has 113 states and 129 transitions. [2020-12-23 00:08:38,217 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-12-23 00:08:38,217 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 129 transitions. [2020-12-23 00:08:38,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-12-23 00:08:38,218 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:08:38,218 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:08:38,432 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:08:38,433 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:08:38,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:08:38,433 INFO L82 PathProgramCache]: Analyzing trace with hash -1719645071, now seen corresponding path program 28 times [2020-12-23 00:08:38,434 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:08:38,434 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760222952] [2020-12-23 00:08:38,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:08:38,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:08:39,076 INFO L134 CoverageAnalysis]: Checked inductivity of 1031 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2020-12-23 00:08:39,076 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760222952] [2020-12-23 00:08:39,076 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1342395433] [2020-12-23 00:08:39,076 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 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:08:39,329 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 00:08:39,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:08:39,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 30 conjunts are in the unsatisfiable core [2020-12-23 00:08:39,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:08:39,464 INFO L134 CoverageAnalysis]: Checked inductivity of 1031 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2020-12-23 00:08:39,464 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:08:39,465 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2020-12-23 00:08:39,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267546793] [2020-12-23 00:08:39,465 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-12-23 00:08:39,465 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:08:39,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-12-23 00:08:39,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2020-12-23 00:08:39,467 INFO L87 Difference]: Start difference. First operand 113 states and 129 transitions. Second operand 32 states. [2020-12-23 00:08:39,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:08:39,580 INFO L93 Difference]: Finished difference Result 170 states and 202 transitions. [2020-12-23 00:08:39,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-12-23 00:08:39,581 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 103 [2020-12-23 00:08:39,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:08:39,582 INFO L225 Difference]: With dead ends: 170 [2020-12-23 00:08:39,582 INFO L226 Difference]: Without dead ends: 116 [2020-12-23 00:08:39,583 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2020-12-23 00:08:39,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-12-23 00:08:39,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 115. [2020-12-23 00:08:39,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-12-23 00:08:39,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 131 transitions. [2020-12-23 00:08:39,588 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 131 transitions. Word has length 103 [2020-12-23 00:08:39,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:08:39,588 INFO L481 AbstractCegarLoop]: Abstraction has 115 states and 131 transitions. [2020-12-23 00:08:39,588 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-12-23 00:08:39,589 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 131 transitions. [2020-12-23 00:08:39,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-12-23 00:08:39,589 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:08:39,590 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:08:39,802 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:08:39,803 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:08:39,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:08:39,803 INFO L82 PathProgramCache]: Analyzing trace with hash -1509799633, now seen corresponding path program 29 times [2020-12-23 00:08:39,804 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:08:39,804 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931290122] [2020-12-23 00:08:39,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:08:39,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:08:40,484 INFO L134 CoverageAnalysis]: Checked inductivity of 1088 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2020-12-23 00:08:40,485 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931290122] [2020-12-23 00:08:40,485 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [77661981] [2020-12-23 00:08:40,485 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 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 [2020-12-23 00:09:12,262 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2020-12-23 00:09:12,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:09:12,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 358 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-23 00:09:12,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:09:12,824 INFO L134 CoverageAnalysis]: Checked inductivity of 1088 backedges. 0 proven. 247 refuted. 0 times theorem prover too weak. 841 trivial. 0 not checked. [2020-12-23 00:09:12,824 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:09:12,824 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 16] total 46 [2020-12-23 00:09:12,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707520403] [2020-12-23 00:09:12,825 INFO L461 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-12-23 00:09:12,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:09:12,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-12-23 00:09:12,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=615, Invalid=1455, Unknown=0, NotChecked=0, Total=2070 [2020-12-23 00:09:12,826 INFO L87 Difference]: Start difference. First operand 115 states and 131 transitions. Second operand 46 states. [2020-12-23 00:09:13,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:09:13,908 INFO L93 Difference]: Finished difference Result 177 states and 212 transitions. [2020-12-23 00:09:13,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-12-23 00:09:13,909 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 105 [2020-12-23 00:09:13,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:09:13,909 INFO L225 Difference]: With dead ends: 177 [2020-12-23 00:09:13,909 INFO L226 Difference]: Without dead ends: 123 [2020-12-23 00:09:13,911 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 841 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1995, Invalid=3705, Unknown=0, NotChecked=0, Total=5700 [2020-12-23 00:09:13,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-12-23 00:09:13,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 120. [2020-12-23 00:09:13,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-12-23 00:09:13,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 137 transitions. [2020-12-23 00:09:13,917 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 137 transitions. Word has length 105 [2020-12-23 00:09:13,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:09:13,917 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 137 transitions. [2020-12-23 00:09:13,917 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-12-23 00:09:13,917 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 137 transitions. [2020-12-23 00:09:13,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-12-23 00:09:13,918 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:09:13,918 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:09:14,118 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2020-12-23 00:09:14,119 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:09:14,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:09:14,120 INFO L82 PathProgramCache]: Analyzing trace with hash -1672110826, now seen corresponding path program 30 times [2020-12-23 00:09:14,120 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:09:14,120 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153808218] [2020-12-23 00:09:14,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:09:14,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:09:14,839 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2020-12-23 00:09:14,840 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153808218] [2020-12-23 00:09:14,840 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1031325447] [2020-12-23 00:09:14,840 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 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 [2020-12-23 00:10:37,215 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 29 check-sat command(s) [2020-12-23 00:10:37,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:10:37,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 361 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-23 00:10:37,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:10:37,872 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 900 trivial. 0 not checked. [2020-12-23 00:10:37,873 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:10:37,873 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 17] total 48 [2020-12-23 00:10:37,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780928734] [2020-12-23 00:10:37,873 INFO L461 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-12-23 00:10:37,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:10:37,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-12-23 00:10:37,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=663, Invalid=1593, Unknown=0, NotChecked=0, Total=2256 [2020-12-23 00:10:37,876 INFO L87 Difference]: Start difference. First operand 120 states and 137 transitions. Second operand 48 states. [2020-12-23 00:10:39,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:10:39,222 INFO L93 Difference]: Finished difference Result 185 states and 222 transitions. [2020-12-23 00:10:39,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-12-23 00:10:39,224 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 110 [2020-12-23 00:10:39,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:10:39,225 INFO L225 Difference]: With dead ends: 185 [2020-12-23 00:10:39,225 INFO L226 Difference]: Without dead ends: 128 [2020-12-23 00:10:39,228 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 915 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2151, Invalid=4011, Unknown=0, NotChecked=0, Total=6162 [2020-12-23 00:10:39,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-12-23 00:10:39,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 125. [2020-12-23 00:10:39,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-12-23 00:10:39,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 143 transitions. [2020-12-23 00:10:39,236 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 143 transitions. Word has length 110 [2020-12-23 00:10:39,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:10:39,236 INFO L481 AbstractCegarLoop]: Abstraction has 125 states and 143 transitions. [2020-12-23 00:10:39,237 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-12-23 00:10:39,237 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 143 transitions. [2020-12-23 00:10:39,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-12-23 00:10:39,237 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:10:39,238 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:10:39,451 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:10:39,452 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:10:39,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:10:39,453 INFO L82 PathProgramCache]: Analyzing trace with hash -1566193397, now seen corresponding path program 31 times [2020-12-23 00:10:39,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:10:39,454 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621840430] [2020-12-23 00:10:39,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:10:39,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:10:40,352 INFO L134 CoverageAnalysis]: Checked inductivity of 1291 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2020-12-23 00:10:40,353 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621840430] [2020-12-23 00:10:40,353 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [479384739] [2020-12-23 00:10:40,353 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 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 [2020-12-23 00:10:40,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:10:40,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 33 conjunts are in the unsatisfiable core [2020-12-23 00:10:40,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:10:40,634 INFO L134 CoverageAnalysis]: Checked inductivity of 1291 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2020-12-23 00:10:40,635 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:10:40,635 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2020-12-23 00:10:40,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801797090] [2020-12-23 00:10:40,635 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-12-23 00:10:40,636 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:10:40,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-12-23 00:10:40,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2020-12-23 00:10:40,638 INFO L87 Difference]: Start difference. First operand 125 states and 143 transitions. Second operand 35 states. [2020-12-23 00:10:40,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:10:40,780 INFO L93 Difference]: Finished difference Result 188 states and 224 transitions. [2020-12-23 00:10:40,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-12-23 00:10:40,781 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 115 [2020-12-23 00:10:40,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:10:40,782 INFO L225 Difference]: With dead ends: 188 [2020-12-23 00:10:40,782 INFO L226 Difference]: Without dead ends: 128 [2020-12-23 00:10:40,782 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2020-12-23 00:10:40,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-12-23 00:10:40,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 127. [2020-12-23 00:10:40,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-12-23 00:10:40,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 145 transitions. [2020-12-23 00:10:40,787 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 145 transitions. Word has length 115 [2020-12-23 00:10:40,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:10:40,787 INFO L481 AbstractCegarLoop]: Abstraction has 127 states and 145 transitions. [2020-12-23 00:10:40,787 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-12-23 00:10:40,787 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 145 transitions. [2020-12-23 00:10:40,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-12-23 00:10:40,788 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:10:40,789 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:10:41,002 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-12-23 00:10:41,003 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:10:41,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:10:41,004 INFO L82 PathProgramCache]: Analyzing trace with hash -179529527, now seen corresponding path program 32 times [2020-12-23 00:10:41,004 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:10:41,004 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857795947] [2020-12-23 00:10:41,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:10:41,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:10:41,885 INFO L134 CoverageAnalysis]: Checked inductivity of 1354 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2020-12-23 00:10:41,886 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857795947] [2020-12-23 00:10:41,886 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559237565] [2020-12-23 00:10:41,886 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 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 [2020-12-23 00:10:42,020 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 00:10:42,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:10:42,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 394 conjuncts, 34 conjunts are in the unsatisfiable core [2020-12-23 00:10:42,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:10:42,185 INFO L134 CoverageAnalysis]: Checked inductivity of 1354 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2020-12-23 00:10:42,186 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:10:42,186 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2020-12-23 00:10:42,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922103011] [2020-12-23 00:10:42,187 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-12-23 00:10:42,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:10:42,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-12-23 00:10:42,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2020-12-23 00:10:42,188 INFO L87 Difference]: Start difference. First operand 127 states and 145 transitions. Second operand 36 states. [2020-12-23 00:10:42,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:10:42,354 INFO L93 Difference]: Finished difference Result 190 states and 226 transitions. [2020-12-23 00:10:42,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-12-23 00:10:42,355 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 117 [2020-12-23 00:10:42,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:10:42,356 INFO L225 Difference]: With dead ends: 190 [2020-12-23 00:10:42,356 INFO L226 Difference]: Without dead ends: 130 [2020-12-23 00:10:42,356 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2020-12-23 00:10:42,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-12-23 00:10:42,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 129. [2020-12-23 00:10:42,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-12-23 00:10:42,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 147 transitions. [2020-12-23 00:10:42,361 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 147 transitions. Word has length 117 [2020-12-23 00:10:42,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:10:42,362 INFO L481 AbstractCegarLoop]: Abstraction has 129 states and 147 transitions. [2020-12-23 00:10:42,362 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-12-23 00:10:42,362 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 147 transitions. [2020-12-23 00:10:42,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2020-12-23 00:10:42,363 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:10:42,363 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:10:42,578 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2020-12-23 00:10:42,579 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:10:42,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:10:42,580 INFO L82 PathProgramCache]: Analyzing trace with hash 964587783, now seen corresponding path program 33 times [2020-12-23 00:10:42,580 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:10:42,580 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083107777] [2020-12-23 00:10:42,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:10:42,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:10:43,431 INFO L134 CoverageAnalysis]: Checked inductivity of 1419 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2020-12-23 00:10:43,431 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083107777] [2020-12-23 00:10:43,431 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1294351053] [2020-12-23 00:10:43,431 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 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 [2020-12-23 00:10:48,566 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2020-12-23 00:10:48,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:10:48,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-23 00:10:48,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:10:49,321 INFO L134 CoverageAnalysis]: Checked inductivity of 1419 backedges. 0 proven. 330 refuted. 0 times theorem prover too weak. 1089 trivial. 0 not checked. [2020-12-23 00:10:49,322 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:10:49,322 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 18] total 52 [2020-12-23 00:10:49,322 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401436917] [2020-12-23 00:10:49,322 INFO L461 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-12-23 00:10:49,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:10:49,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-12-23 00:10:49,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=1870, Unknown=0, NotChecked=0, Total=2652 [2020-12-23 00:10:49,323 INFO L87 Difference]: Start difference. First operand 129 states and 147 transitions. Second operand 52 states. [2020-12-23 00:10:50,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:10:50,789 INFO L93 Difference]: Finished difference Result 197 states and 236 transitions. [2020-12-23 00:10:50,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-12-23 00:10:50,790 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 119 [2020-12-23 00:10:50,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:10:50,791 INFO L225 Difference]: With dead ends: 197 [2020-12-23 00:10:50,791 INFO L226 Difference]: Without dead ends: 137 [2020-12-23 00:10:50,792 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1089 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=2550, Invalid=4760, Unknown=0, NotChecked=0, Total=7310 [2020-12-23 00:10:50,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-12-23 00:10:50,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 134. [2020-12-23 00:10:50,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-12-23 00:10:50,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 153 transitions. [2020-12-23 00:10:50,796 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 153 transitions. Word has length 119 [2020-12-23 00:10:50,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:10:50,797 INFO L481 AbstractCegarLoop]: Abstraction has 134 states and 153 transitions. [2020-12-23 00:10:50,797 INFO L482 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-12-23 00:10:50,797 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 153 transitions. [2020-12-23 00:10:50,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-12-23 00:10:50,798 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:10:50,799 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:10:51,012 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-12-23 00:10:51,013 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:10:51,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:10:51,014 INFO L82 PathProgramCache]: Analyzing trace with hash 1726192318, now seen corresponding path program 34 times [2020-12-23 00:10:51,014 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:10:51,014 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411078051] [2020-12-23 00:10:51,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:10:51,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:10:51,979 INFO L134 CoverageAnalysis]: Checked inductivity of 1532 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2020-12-23 00:10:51,980 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411078051] [2020-12-23 00:10:51,980 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963676395] [2020-12-23 00:10:51,980 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 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 [2020-12-23 00:10:52,513 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 00:10:52,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:10:52,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 36 conjunts are in the unsatisfiable core [2020-12-23 00:10:52,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:10:52,669 INFO L134 CoverageAnalysis]: Checked inductivity of 1532 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2020-12-23 00:10:52,669 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:10:52,669 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2020-12-23 00:10:52,670 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270578355] [2020-12-23 00:10:52,670 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-12-23 00:10:52,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:10:52,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-12-23 00:10:52,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2020-12-23 00:10:52,671 INFO L87 Difference]: Start difference. First operand 134 states and 153 transitions. Second operand 38 states. [2020-12-23 00:10:52,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:10:52,858 INFO L93 Difference]: Finished difference Result 200 states and 238 transitions. [2020-12-23 00:10:52,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-12-23 00:10:52,859 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 124 [2020-12-23 00:10:52,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:10:52,860 INFO L225 Difference]: With dead ends: 200 [2020-12-23 00:10:52,860 INFO L226 Difference]: Without dead ends: 137 [2020-12-23 00:10:52,861 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2020-12-23 00:10:52,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-12-23 00:10:52,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 136. [2020-12-23 00:10:52,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-12-23 00:10:52,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 155 transitions. [2020-12-23 00:10:52,866 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 155 transitions. Word has length 124 [2020-12-23 00:10:52,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:10:52,866 INFO L481 AbstractCegarLoop]: Abstraction has 136 states and 155 transitions. [2020-12-23 00:10:52,866 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-12-23 00:10:52,866 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 155 transitions. [2020-12-23 00:10:52,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-12-23 00:10:52,867 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:10:52,867 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:10:53,081 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-12-23 00:10:53,082 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:10:53,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:10:53,082 INFO L82 PathProgramCache]: Analyzing trace with hash 1610064064, now seen corresponding path program 35 times [2020-12-23 00:10:53,083 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:10:53,083 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380182491] [2020-12-23 00:10:53,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:10:53,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:10:54,103 INFO L134 CoverageAnalysis]: Checked inductivity of 1601 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2020-12-23 00:10:54,103 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380182491] [2020-12-23 00:10:54,104 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2123462786] [2020-12-23 00:10:54,104 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 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