/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_two_index_09.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-06 10:01:49,340 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 10:01:49,343 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 10:01:49,395 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-06 10:01:49,396 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-06 10:01:49,400 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-06 10:01:49,405 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-06 10:01:49,410 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-06 10:01:49,414 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-06 10:01:49,421 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-06 10:01:49,425 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-06 10:01:49,426 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2021-01-06 10:01:49,501 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 10:01:49,502 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 10:01:49,503 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 10:01:49,509 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-01-06 10:01:49,551 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 10:01:49,551 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 10:01:49,553 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 10:01:49,553 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 10:01:49,553 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 10:01:49,553 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 10:01:49,554 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 10:01:49,554 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 10:01:49,554 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 10:01:49,554 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 10:01:49,554 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 10:01:49,555 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 10:01:49,555 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 10:01:49,555 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 10:01:49,555 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 10:01:49,556 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 10:01:49,556 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 10:01:49,556 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 10:01:49,556 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 10:01:49,557 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 10:01:49,557 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 10:01:49,557 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 10:01:49,557 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 10:01:49,557 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 10:01:49,558 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 10:01:49,558 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 10:01:49,948 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 10:01:49,979 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 10:01:49,982 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 10:01:49,984 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 10:01:49,985 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 10:01:49,986 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/standard_two_index_09.i [2021-01-06 10:01:50,075 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/b426af4cc/5734061149014dc592cc0fce8b867c6a/FLAG124c93393 [2021-01-06 10:01:50,683 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 10:01:50,683 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-examples/standard_two_index_09.i [2021-01-06 10:01:50,691 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/b426af4cc/5734061149014dc592cc0fce8b867c6a/FLAG124c93393 [2021-01-06 10:01:51,012 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/b426af4cc/5734061149014dc592cc0fce8b867c6a [2021-01-06 10:01:51,022 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 10:01:51,024 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 10:01:51,026 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 10:01:51,026 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 10:01:51,033 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 10:01:51,035 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 10:01:51" (1/1) ... [2021-01-06 10:01:51,037 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@12006822 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:01:51, skipping insertion in model container [2021-01-06 10:01:51,037 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 10:01:51" (1/1) ... [2021-01-06 10:01:51,046 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 10:01:51,066 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-01-06 10:01:51,222 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_two_index_09.i[814,827] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~b~0,],[IdentifierExpression[~i~0,]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~a~0,],[IdentifierExpression[~j~0,]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~j~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~j~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~j~0,] [2021-01-06 10:01:51,243 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 10:01:51,253 INFO L203 MainTranslator]: Completed pre-run [2021-01-06 10:01:51,269 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_two_index_09.i[814,827] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#b~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#b~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#a~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#a~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~j~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~j~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~j~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~j~0,] [2021-01-06 10:01:51,278 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 10:01:51,296 INFO L208 MainTranslator]: Completed translation [2021-01-06 10:01:51,297 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:01:51 WrapperNode [2021-01-06 10:01:51,297 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 10:01:51,298 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 10:01:51,299 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 10:01:51,299 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 10:01:51,308 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:01:51" (1/1) ... [2021-01-06 10:01:51,317 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:01:51" (1/1) ... [2021-01-06 10:01:51,342 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 10:01:51,343 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 10:01:51,343 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 10:01:51,343 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 10:01:51,354 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:01:51" (1/1) ... [2021-01-06 10:01:51,355 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:01:51" (1/1) ... [2021-01-06 10:01:51,357 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:01:51" (1/1) ... [2021-01-06 10:01:51,357 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:01:51" (1/1) ... [2021-01-06 10:01:51,363 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:01:51" (1/1) ... [2021-01-06 10:01:51,368 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:01:51" (1/1) ... [2021-01-06 10:01:51,369 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:01:51" (1/1) ... [2021-01-06 10:01:51,372 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 10:01:51,373 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 10:01:51,373 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 10:01:51,373 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 10:01:51,374 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:01:51" (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 [2021-01-06 10:01:51,497 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 10:01:51,498 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 10:01:51,498 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-01-06 10:01:51,499 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 10:01:51,499 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 10:01:51,499 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-01-06 10:01:51,500 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-01-06 10:01:51,913 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 10:01:51,913 INFO L299 CfgBuilder]: Removed 9 assume(true) statements. [2021-01-06 10:01:51,915 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 10:01:51 BoogieIcfgContainer [2021-01-06 10:01:51,915 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 10:01:51,917 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 10:01:51,917 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 10:01:51,921 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 10:01:51,921 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 10:01:51" (1/3) ... [2021-01-06 10:01:51,922 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42376346 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 10:01:51, skipping insertion in model container [2021-01-06 10:01:51,923 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:01:51" (2/3) ... [2021-01-06 10:01:51,923 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42376346 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 10:01:51, skipping insertion in model container [2021-01-06 10:01:51,923 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 10:01:51" (3/3) ... [2021-01-06 10:01:51,925 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_two_index_09.i [2021-01-06 10:01:51,933 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 10:01:51,939 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-01-06 10:01:51,966 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-01-06 10:01:52,026 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 10:01:52,027 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 10:01:52,027 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 10:01:52,030 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 10:01:52,030 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 10:01:52,030 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 10:01:52,031 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 10:01:52,031 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 10:01:52,067 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states. [2021-01-06 10:01:52,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-01-06 10:01:52,080 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:01:52,084 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:01:52,084 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:01:52,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:01:52,096 INFO L82 PathProgramCache]: Analyzing trace with hash -1157635880, now seen corresponding path program 1 times [2021-01-06 10:01:52,107 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:01:52,108 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243155562] [2021-01-06 10:01:52,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:01:52,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:01:52,336 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:01:52,337 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243155562] [2021-01-06 10:01:52,338 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 10:01:52,338 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 10:01:52,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138128096] [2021-01-06 10:01:52,344 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 10:01:52,345 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:01:52,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 10:01:52,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 10:01:52,363 INFO L87 Difference]: Start difference. First operand 15 states. Second operand 3 states. [2021-01-06 10:01:52,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:01:52,404 INFO L93 Difference]: Finished difference Result 28 states and 40 transitions. [2021-01-06 10:01:52,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 10:01:52,406 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2021-01-06 10:01:52,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:01:52,416 INFO L225 Difference]: With dead ends: 28 [2021-01-06 10:01:52,416 INFO L226 Difference]: Without dead ends: 12 [2021-01-06 10:01:52,420 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 [2021-01-06 10:01:52,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2021-01-06 10:01:52,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2021-01-06 10:01:52,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2021-01-06 10:01:52,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 14 transitions. [2021-01-06 10:01:52,458 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 14 transitions. Word has length 9 [2021-01-06 10:01:52,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:01:52,458 INFO L481 AbstractCegarLoop]: Abstraction has 12 states and 14 transitions. [2021-01-06 10:01:52,458 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 10:01:52,459 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 14 transitions. [2021-01-06 10:01:52,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-01-06 10:01:52,459 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:01:52,459 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:01:52,460 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-06 10:01:52,460 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:01:52,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:01:52,461 INFO L82 PathProgramCache]: Analyzing trace with hash 722375763, now seen corresponding path program 1 times [2021-01-06 10:01:52,462 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:01:52,462 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55773129] [2021-01-06 10:01:52,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:01:52,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:01:52,514 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:01:52,515 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55773129] [2021-01-06 10:01:52,515 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [921493690] [2021-01-06 10:01:52,516 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 [2021-01-06 10:01:52,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:01:52,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 2 conjunts are in the unsatisfiable core [2021-01-06 10:01:52,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:01:52,607 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 10:01:52,608 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:01:52,608 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2021-01-06 10:01:52,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074157600] [2021-01-06 10:01:52,610 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 10:01:52,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:01:52,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 10:01:52,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-01-06 10:01:52,612 INFO L87 Difference]: Start difference. First operand 12 states and 14 transitions. Second operand 3 states. [2021-01-06 10:01:52,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:01:52,637 INFO L93 Difference]: Finished difference Result 24 states and 27 transitions. [2021-01-06 10:01:52,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 10:01:52,638 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2021-01-06 10:01:52,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:01:52,639 INFO L225 Difference]: With dead ends: 24 [2021-01-06 10:01:52,639 INFO L226 Difference]: Without dead ends: 18 [2021-01-06 10:01:52,640 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-01-06 10:01:52,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-01-06 10:01:52,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 13. [2021-01-06 10:01:52,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2021-01-06 10:01:52,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2021-01-06 10:01:52,645 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 10 [2021-01-06 10:01:52,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:01:52,645 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2021-01-06 10:01:52,645 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 10:01:52,646 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2021-01-06 10:01:52,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-01-06 10:01:52,646 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:01:52,646 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:01:52,860 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-01-06 10:01:52,861 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:01:52,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:01:52,863 INFO L82 PathProgramCache]: Analyzing trace with hash 970258327, now seen corresponding path program 1 times [2021-01-06 10:01:52,864 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:01:52,864 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28696713] [2021-01-06 10:01:52,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:01:52,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:01:52,958 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 10:01:52,959 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28696713] [2021-01-06 10:01:52,959 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [621887617] [2021-01-06 10:01:52,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:01:53,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:01:53,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 3 conjunts are in the unsatisfiable core [2021-01-06 10:01:53,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:01:53,124 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 10:01:53,124 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:01:53,125 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-01-06 10:01:53,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765379387] [2021-01-06 10:01:53,125 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 10:01:53,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:01:53,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 10:01:53,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-01-06 10:01:53,128 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand 5 states. [2021-01-06 10:01:53,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:01:53,167 INFO L93 Difference]: Finished difference Result 28 states and 32 transitions. [2021-01-06 10:01:53,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-06 10:01:53,168 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2021-01-06 10:01:53,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:01:53,169 INFO L225 Difference]: With dead ends: 28 [2021-01-06 10:01:53,169 INFO L226 Difference]: Without dead ends: 19 [2021-01-06 10:01:53,170 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-01-06 10:01:53,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-01-06 10:01:53,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 14. [2021-01-06 10:01:53,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2021-01-06 10:01:53,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2021-01-06 10:01:53,176 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 11 [2021-01-06 10:01:53,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:01:53,176 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2021-01-06 10:01:53,176 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 10:01:53,177 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2021-01-06 10:01:53,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-01-06 10:01:53,178 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:01:53,178 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:01:53,392 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:01:53,393 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:01:53,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:01:53,395 INFO L82 PathProgramCache]: Analyzing trace with hash -519784366, now seen corresponding path program 2 times [2021-01-06 10:01:53,396 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:01:53,397 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782953815] [2021-01-06 10:01:53,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:01:53,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:01:53,453 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-01-06 10:01:53,454 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782953815] [2021-01-06 10:01:53,454 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [185837719] [2021-01-06 10:01:53,454 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:01:53,517 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 10:01:53,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:01:53,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 4 conjunts are in the unsatisfiable core [2021-01-06 10:01:53,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:01:53,565 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 10:01:53,566 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:01:53,566 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 7 [2021-01-06 10:01:53,567 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123281171] [2021-01-06 10:01:53,567 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-06 10:01:53,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:01:53,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-06 10:01:53,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2021-01-06 10:01:53,569 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand 7 states. [2021-01-06 10:01:53,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:01:53,623 INFO L93 Difference]: Finished difference Result 36 states and 42 transitions. [2021-01-06 10:01:53,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-01-06 10:01:53,624 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2021-01-06 10:01:53,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:01:53,625 INFO L225 Difference]: With dead ends: 36 [2021-01-06 10:01:53,625 INFO L226 Difference]: Without dead ends: 27 [2021-01-06 10:01:53,626 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2021-01-06 10:01:53,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-01-06 10:01:53,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 17. [2021-01-06 10:01:53,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2021-01-06 10:01:53,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2021-01-06 10:01:53,632 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 12 [2021-01-06 10:01:53,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:01:53,632 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2021-01-06 10:01:53,632 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-06 10:01:53,632 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2021-01-06 10:01:53,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-01-06 10:01:53,633 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:01:53,634 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:01:53,849 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:01:53,850 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:01:53,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:01:53,852 INFO L82 PathProgramCache]: Analyzing trace with hash -1963781416, now seen corresponding path program 3 times [2021-01-06 10:01:53,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:01:53,853 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287685013] [2021-01-06 10:01:53,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:01:53,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:01:53,933 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-01-06 10:01:53,934 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287685013] [2021-01-06 10:01:53,934 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1812632868] [2021-01-06 10:01:53,934 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:01:54,015 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-01-06 10:01:54,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:01:54,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 4 conjunts are in the unsatisfiable core [2021-01-06 10:01:54,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:01:54,049 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-01-06 10:01:54,049 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:01:54,049 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-01-06 10:01:54,050 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345768127] [2021-01-06 10:01:54,050 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-06 10:01:54,050 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:01:54,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-06 10:01:54,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-01-06 10:01:54,052 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand 6 states. [2021-01-06 10:01:54,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:01:54,095 INFO L93 Difference]: Finished difference Result 39 states and 42 transitions. [2021-01-06 10:01:54,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 10:01:54,096 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2021-01-06 10:01:54,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:01:54,097 INFO L225 Difference]: With dead ends: 39 [2021-01-06 10:01:54,097 INFO L226 Difference]: Without dead ends: 33 [2021-01-06 10:01:54,098 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-01-06 10:01:54,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-01-06 10:01:54,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 18. [2021-01-06 10:01:54,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2021-01-06 10:01:54,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2021-01-06 10:01:54,103 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 15 [2021-01-06 10:01:54,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:01:54,104 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2021-01-06 10:01:54,104 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-06 10:01:54,104 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2021-01-06 10:01:54,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-01-06 10:01:54,105 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:01:54,105 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:01:54,309 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:01:54,310 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:01:54,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:01:54,311 INFO L82 PathProgramCache]: Analyzing trace with hash -696235598, now seen corresponding path program 4 times [2021-01-06 10:01:54,312 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:01:54,312 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739689712] [2021-01-06 10:01:54,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:01:54,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:01:54,384 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-01-06 10:01:54,384 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739689712] [2021-01-06 10:01:54,385 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [826967378] [2021-01-06 10:01:54,385 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:01:54,448 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 10:01:54,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:01:54,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 6 conjunts are in the unsatisfiable core [2021-01-06 10:01:54,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:01:54,541 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-01-06 10:01:54,542 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:01:54,542 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2021-01-06 10:01:54,542 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623433616] [2021-01-06 10:01:54,543 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-06 10:01:54,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:01:54,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-06 10:01:54,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=56, Unknown=0, NotChecked=0, Total=110 [2021-01-06 10:01:54,545 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand 11 states. [2021-01-06 10:01:54,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:01:54,621 INFO L93 Difference]: Finished difference Result 54 states and 62 transitions. [2021-01-06 10:01:54,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 10:01:54,621 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 16 [2021-01-06 10:01:54,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:01:54,622 INFO L225 Difference]: With dead ends: 54 [2021-01-06 10:01:54,622 INFO L226 Difference]: Without dead ends: 43 [2021-01-06 10:01:54,623 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=56, Unknown=0, NotChecked=0, Total=110 [2021-01-06 10:01:54,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-01-06 10:01:54,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 23. [2021-01-06 10:01:54,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2021-01-06 10:01:54,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2021-01-06 10:01:54,630 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 16 [2021-01-06 10:01:54,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:01:54,630 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2021-01-06 10:01:54,630 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-01-06 10:01:54,630 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2021-01-06 10:01:54,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-01-06 10:01:54,631 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:01:54,631 INFO L422 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:01:54,846 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-01-06 10:01:54,847 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:01:54,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:01:54,848 INFO L82 PathProgramCache]: Analyzing trace with hash 1003861208, now seen corresponding path program 5 times [2021-01-06 10:01:54,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:01:54,849 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603514982] [2021-01-06 10:01:54,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:01:54,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:01:54,933 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-01-06 10:01:54,933 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603514982] [2021-01-06 10:01:54,934 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [792391166] [2021-01-06 10:01:54,934 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:01:55,041 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-01-06 10:01:55,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:01:55,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 10:01:55,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:01:55,182 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-01-06 10:01:55,183 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:01:55,183 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 11] total 16 [2021-01-06 10:01:55,183 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985370698] [2021-01-06 10:01:55,184 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-06 10:01:55,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:01:55,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-06 10:01:55,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=121, Unknown=0, NotChecked=0, Total=240 [2021-01-06 10:01:55,198 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand 16 states. [2021-01-06 10:01:55,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:01:55,305 INFO L93 Difference]: Finished difference Result 66 states and 75 transitions. [2021-01-06 10:01:55,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-01-06 10:01:55,306 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 21 [2021-01-06 10:01:55,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:01:55,307 INFO L225 Difference]: With dead ends: 66 [2021-01-06 10:01:55,307 INFO L226 Difference]: Without dead ends: 54 [2021-01-06 10:01:55,308 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=119, Invalid=121, Unknown=0, NotChecked=0, Total=240 [2021-01-06 10:01:55,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-01-06 10:01:55,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 29. [2021-01-06 10:01:55,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2021-01-06 10:01:55,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2021-01-06 10:01:55,315 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 21 [2021-01-06 10:01:55,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:01:55,315 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2021-01-06 10:01:55,316 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-01-06 10:01:55,316 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2021-01-06 10:01:55,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-01-06 10:01:55,317 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:01:55,317 INFO L422 BasicCegarLoop]: trace histogram [13, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:01:55,530 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:01:55,531 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:01:55,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:01:55,532 INFO L82 PathProgramCache]: Analyzing trace with hash -676746537, now seen corresponding path program 6 times [2021-01-06 10:01:55,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:01:55,534 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320381546] [2021-01-06 10:01:55,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:01:55,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:01:55,700 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-01-06 10:01:55,700 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320381546] [2021-01-06 10:01:55,701 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1612852133] [2021-01-06 10:01:55,701 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:01:55,921 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-01-06 10:01:55,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:01:55,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 7 conjunts are in the unsatisfiable core [2021-01-06 10:01:55,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:01:56,007 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-01-06 10:01:56,007 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:01:56,007 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-01-06 10:01:56,008 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963878740] [2021-01-06 10:01:56,008 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-01-06 10:01:56,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:01:56,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-01-06 10:01:56,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-01-06 10:01:56,010 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand 9 states. [2021-01-06 10:01:56,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:01:56,082 INFO L93 Difference]: Finished difference Result 66 states and 69 transitions. [2021-01-06 10:01:56,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 10:01:56,083 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 27 [2021-01-06 10:01:56,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:01:56,084 INFO L225 Difference]: With dead ends: 66 [2021-01-06 10:01:56,084 INFO L226 Difference]: Without dead ends: 60 [2021-01-06 10:01:56,085 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-01-06 10:01:56,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-01-06 10:01:56,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 30. [2021-01-06 10:01:56,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2021-01-06 10:01:56,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2021-01-06 10:01:56,091 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 27 [2021-01-06 10:01:56,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:01:56,092 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2021-01-06 10:01:56,092 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-01-06 10:01:56,092 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2021-01-06 10:01:56,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-01-06 10:01:56,093 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:01:56,093 INFO L422 BasicCegarLoop]: trace histogram [13, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:01:56,306 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:01:56,307 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:01:56,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:01:56,308 INFO L82 PathProgramCache]: Analyzing trace with hash 547139987, now seen corresponding path program 7 times [2021-01-06 10:01:56,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:01:56,310 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405203539] [2021-01-06 10:01:56,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:01:56,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:01:56,479 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-01-06 10:01:56,480 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405203539] [2021-01-06 10:01:56,480 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1299707841] [2021-01-06 10:01:56,480 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:01:56,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:01:56,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-06 10:01:56,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:01:56,752 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-01-06 10:01:56,753 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:01:56,753 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 16] total 22 [2021-01-06 10:01:56,756 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963246112] [2021-01-06 10:01:56,757 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-01-06 10:01:56,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:01:56,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-01-06 10:01:56,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=232, Unknown=0, NotChecked=0, Total=462 [2021-01-06 10:01:56,759 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand 22 states. [2021-01-06 10:01:56,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:01:56,896 INFO L93 Difference]: Finished difference Result 86 states and 96 transitions. [2021-01-06 10:01:56,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-01-06 10:01:56,897 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 28 [2021-01-06 10:01:56,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:01:56,898 INFO L225 Difference]: With dead ends: 86 [2021-01-06 10:01:56,898 INFO L226 Difference]: Without dead ends: 72 [2021-01-06 10:01:56,899 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=230, Invalid=232, Unknown=0, NotChecked=0, Total=462 [2021-01-06 10:01:56,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-01-06 10:01:56,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 37. [2021-01-06 10:01:56,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2021-01-06 10:01:56,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2021-01-06 10:01:56,906 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 28 [2021-01-06 10:01:56,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:01:56,906 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2021-01-06 10:01:56,907 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2021-01-06 10:01:56,907 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2021-01-06 10:01:56,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-01-06 10:01:56,908 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:01:56,908 INFO L422 BasicCegarLoop]: trace histogram [19, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:01:57,122 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-01-06 10:01:57,123 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:01:57,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:01:57,124 INFO L82 PathProgramCache]: Analyzing trace with hash 1365801079, now seen corresponding path program 8 times [2021-01-06 10:01:57,124 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:01:57,125 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952496095] [2021-01-06 10:01:57,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:01:57,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:01:57,299 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-01-06 10:01:57,300 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952496095] [2021-01-06 10:01:57,300 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1426269875] [2021-01-06 10:01:57,300 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:01:57,377 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 10:01:57,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:01:57,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 21 conjunts are in the unsatisfiable core [2021-01-06 10:01:57,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:01:57,648 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-01-06 10:01:57,649 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:01:57,649 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 22] total 28 [2021-01-06 10:01:57,649 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081676051] [2021-01-06 10:01:57,650 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-01-06 10:01:57,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:01:57,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-01-06 10:01:57,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=377, Invalid=379, Unknown=0, NotChecked=0, Total=756 [2021-01-06 10:01:57,652 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand 28 states. [2021-01-06 10:01:57,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:01:57,794 INFO L93 Difference]: Finished difference Result 99 states and 109 transitions. [2021-01-06 10:01:57,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-01-06 10:01:57,795 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 35 [2021-01-06 10:01:57,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:01:57,796 INFO L225 Difference]: With dead ends: 99 [2021-01-06 10:01:57,796 INFO L226 Difference]: Without dead ends: 84 [2021-01-06 10:01:57,797 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=377, Invalid=379, Unknown=0, NotChecked=0, Total=756 [2021-01-06 10:01:57,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-01-06 10:01:57,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 44. [2021-01-06 10:01:57,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2021-01-06 10:01:57,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2021-01-06 10:01:57,805 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 35 [2021-01-06 10:01:57,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:01:57,805 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2021-01-06 10:01:57,805 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2021-01-06 10:01:57,805 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2021-01-06 10:01:57,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-01-06 10:01:57,806 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:01:57,807 INFO L422 BasicCegarLoop]: trace histogram [25, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:01:58,019 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:01:58,021 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:01:58,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:01:58,022 INFO L82 PathProgramCache]: Analyzing trace with hash -838959661, now seen corresponding path program 9 times [2021-01-06 10:01:58,023 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:01:58,023 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018079167] [2021-01-06 10:01:58,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:01:58,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:01:58,149 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2021-01-06 10:01:58,149 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018079167] [2021-01-06 10:01:58,150 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1450542287] [2021-01-06 10:01:58,150 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:01:58,306 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-01-06 10:01:58,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:01:58,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 10:01:58,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:01:58,370 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2021-01-06 10:01:58,371 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:01:58,371 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-01-06 10:01:58,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324383905] [2021-01-06 10:01:58,372 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-01-06 10:01:58,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:01:58,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-01-06 10:01:58,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-01-06 10:01:58,373 INFO L87 Difference]: Start difference. First operand 44 states and 46 transitions. Second operand 12 states. [2021-01-06 10:01:58,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:01:58,455 INFO L93 Difference]: Finished difference Result 96 states and 99 transitions. [2021-01-06 10:01:58,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 10:01:58,455 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 42 [2021-01-06 10:01:58,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:01:58,456 INFO L225 Difference]: With dead ends: 96 [2021-01-06 10:01:58,456 INFO L226 Difference]: Without dead ends: 90 [2021-01-06 10:01:58,457 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-01-06 10:01:58,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-01-06 10:01:58,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 45. [2021-01-06 10:01:58,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2021-01-06 10:01:58,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2021-01-06 10:01:58,466 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 42 [2021-01-06 10:01:58,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:01:58,467 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2021-01-06 10:01:58,467 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-01-06 10:01:58,467 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2021-01-06 10:01:58,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-01-06 10:01:58,468 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:01:58,468 INFO L422 BasicCegarLoop]: trace histogram [25, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:01:58,678 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:01:58,679 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:01:58,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:01:58,680 INFO L82 PathProgramCache]: Analyzing trace with hash -186499561, now seen corresponding path program 10 times [2021-01-06 10:01:58,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:01:58,681 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395045007] [2021-01-06 10:01:58,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:01:58,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:01:58,843 INFO L134 CoverageAnalysis]: Checked inductivity of 370 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2021-01-06 10:01:58,845 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395045007] [2021-01-06 10:01:58,845 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1123826866] [2021-01-06 10:01:58,845 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:01:58,934 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 10:01:58,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:01:58,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 27 conjunts are in the unsatisfiable core [2021-01-06 10:01:58,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:01:59,266 INFO L134 CoverageAnalysis]: Checked inductivity of 370 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-01-06 10:01:59,267 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:01:59,267 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 28] total 36 [2021-01-06 10:01:59,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572920158] [2021-01-06 10:01:59,268 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-01-06 10:01:59,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:01:59,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-01-06 10:01:59,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=629, Invalid=631, Unknown=0, NotChecked=0, Total=1260 [2021-01-06 10:01:59,270 INFO L87 Difference]: Start difference. First operand 45 states and 47 transitions. Second operand 36 states. [2021-01-06 10:01:59,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:01:59,474 INFO L93 Difference]: Finished difference Result 121 states and 133 transitions. [2021-01-06 10:01:59,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-01-06 10:01:59,475 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 43 [2021-01-06 10:01:59,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:01:59,476 INFO L225 Difference]: With dead ends: 121 [2021-01-06 10:01:59,476 INFO L226 Difference]: Without dead ends: 104 [2021-01-06 10:01:59,478 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 721 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=629, Invalid=631, Unknown=0, NotChecked=0, Total=1260 [2021-01-06 10:01:59,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-01-06 10:01:59,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 54. [2021-01-06 10:01:59,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2021-01-06 10:01:59,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 56 transitions. [2021-01-06 10:01:59,491 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 56 transitions. Word has length 43 [2021-01-06 10:01:59,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:01:59,492 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 56 transitions. [2021-01-06 10:01:59,492 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2021-01-06 10:01:59,492 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 56 transitions. [2021-01-06 10:01:59,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-01-06 10:01:59,493 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:01:59,493 INFO L422 BasicCegarLoop]: trace histogram [33, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:01:59,700 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-01-06 10:01:59,701 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:01:59,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:01:59,702 INFO L82 PathProgramCache]: Analyzing trace with hash 365947091, now seen corresponding path program 11 times [2021-01-06 10:01:59,702 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:01:59,702 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84939385] [2021-01-06 10:01:59,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:01:59,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:01:59,878 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 561 trivial. 0 not checked. [2021-01-06 10:01:59,878 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84939385] [2021-01-06 10:01:59,878 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [793205299] [2021-01-06 10:01:59,879 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:03:32,239 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2021-01-06 10:03:32,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:03:32,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 35 conjunts are in the unsatisfiable core [2021-01-06 10:03:32,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:03:32,796 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-01-06 10:03:32,797 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:03:32,797 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 36] total 44 [2021-01-06 10:03:32,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136751996] [2021-01-06 10:03:32,798 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2021-01-06 10:03:32,798 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:03:32,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-01-06 10:03:32,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=945, Invalid=947, Unknown=0, NotChecked=0, Total=1892 [2021-01-06 10:03:32,800 INFO L87 Difference]: Start difference. First operand 54 states and 56 transitions. Second operand 44 states. [2021-01-06 10:03:33,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:03:33,070 INFO L93 Difference]: Finished difference Result 136 states and 148 transitions. [2021-01-06 10:03:33,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-01-06 10:03:33,070 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 52 [2021-01-06 10:03:33,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:03:33,071 INFO L225 Difference]: With dead ends: 136 [2021-01-06 10:03:33,072 INFO L226 Difference]: Without dead ends: 118 [2021-01-06 10:03:33,073 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1189 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=945, Invalid=947, Unknown=0, NotChecked=0, Total=1892 [2021-01-06 10:03:33,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-01-06 10:03:33,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 63. [2021-01-06 10:03:33,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2021-01-06 10:03:33,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 65 transitions. [2021-01-06 10:03:33,081 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 65 transitions. Word has length 52 [2021-01-06 10:03:33,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:03:33,082 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 65 transitions. [2021-01-06 10:03:33,082 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2021-01-06 10:03:33,082 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 65 transitions. [2021-01-06 10:03:33,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-01-06 10:03:33,083 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:03:33,083 INFO L422 BasicCegarLoop]: trace histogram [41, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:03:33,297 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-01-06 10:03:33,298 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:03:33,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:03:33,299 INFO L82 PathProgramCache]: Analyzing trace with hash 839622807, now seen corresponding path program 12 times [2021-01-06 10:03:33,299 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:03:33,300 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227601790] [2021-01-06 10:03:33,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:03:33,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:03:33,462 INFO L134 CoverageAnalysis]: Checked inductivity of 927 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 861 trivial. 0 not checked. [2021-01-06 10:03:33,463 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227601790] [2021-01-06 10:03:33,463 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [718854957] [2021-01-06 10:03:33,463 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:03:44,194 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-01-06 10:03:44,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:03:44,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 10:03:44,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:03:44,310 INFO L134 CoverageAnalysis]: Checked inductivity of 927 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 861 trivial. 0 not checked. [2021-01-06 10:03:44,311 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:03:44,311 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-01-06 10:03:44,311 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092261954] [2021-01-06 10:03:44,312 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-01-06 10:03:44,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:03:44,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-01-06 10:03:44,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2021-01-06 10:03:44,313 INFO L87 Difference]: Start difference. First operand 63 states and 65 transitions. Second operand 15 states. [2021-01-06 10:03:44,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:03:44,428 INFO L93 Difference]: Finished difference Result 130 states and 133 transitions. [2021-01-06 10:03:44,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-01-06 10:03:44,429 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 61 [2021-01-06 10:03:44,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:03:44,431 INFO L225 Difference]: With dead ends: 130 [2021-01-06 10:03:44,431 INFO L226 Difference]: Without dead ends: 124 [2021-01-06 10:03:44,431 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2021-01-06 10:03:44,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-01-06 10:03:44,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 64. [2021-01-06 10:03:44,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2021-01-06 10:03:44,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 66 transitions. [2021-01-06 10:03:44,440 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 66 transitions. Word has length 61 [2021-01-06 10:03:44,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:03:44,441 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 66 transitions. [2021-01-06 10:03:44,441 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2021-01-06 10:03:44,441 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 66 transitions. [2021-01-06 10:03:44,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-01-06 10:03:44,442 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:03:44,442 INFO L422 BasicCegarLoop]: trace histogram [41, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:03:44,642 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-01-06 10:03:44,643 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:03:44,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:03:44,644 INFO L82 PathProgramCache]: Analyzing trace with hash 309949395, now seen corresponding path program 13 times [2021-01-06 10:03:44,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:03:44,644 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646967696] [2021-01-06 10:03:44,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:03:44,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:03:44,836 INFO L134 CoverageAnalysis]: Checked inductivity of 939 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 861 trivial. 0 not checked. [2021-01-06 10:03:44,837 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646967696] [2021-01-06 10:03:44,837 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1619062280] [2021-01-06 10:03:44,837 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:03:44,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:03:44,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 43 conjunts are in the unsatisfiable core [2021-01-06 10:03:44,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:03:45,458 INFO L134 CoverageAnalysis]: Checked inductivity of 939 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2021-01-06 10:03:45,459 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:03:45,459 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 44] total 53 [2021-01-06 10:03:45,459 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885187821] [2021-01-06 10:03:45,460 INFO L461 AbstractCegarLoop]: Interpolant automaton has 53 states [2021-01-06 10:03:45,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:03:45,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-01-06 10:03:45,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1377, Invalid=1379, Unknown=0, NotChecked=0, Total=2756 [2021-01-06 10:03:45,462 INFO L87 Difference]: Start difference. First operand 64 states and 66 transitions. Second operand 53 states. [2021-01-06 10:03:45,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:03:45,767 INFO L93 Difference]: Finished difference Result 159 states and 172 transitions. [2021-01-06 10:03:45,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-01-06 10:03:45,768 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 62 [2021-01-06 10:03:45,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:03:45,769 INFO L225 Difference]: With dead ends: 159 [2021-01-06 10:03:45,769 INFO L226 Difference]: Without dead ends: 139 [2021-01-06 10:03:45,770 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1845 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=1377, Invalid=1379, Unknown=0, NotChecked=0, Total=2756 [2021-01-06 10:03:45,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-01-06 10:03:45,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 74. [2021-01-06 10:03:45,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2021-01-06 10:03:45,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 76 transitions. [2021-01-06 10:03:45,779 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 76 transitions. Word has length 62 [2021-01-06 10:03:45,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:03:45,780 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 76 transitions. [2021-01-06 10:03:45,780 INFO L482 AbstractCegarLoop]: Interpolant automaton has 53 states. [2021-01-06 10:03:45,780 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 76 transitions. [2021-01-06 10:03:45,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-01-06 10:03:45,781 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:03:45,781 INFO L422 BasicCegarLoop]: trace histogram [50, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:03:45,996 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:03:45,997 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:03:45,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:03:45,997 INFO L82 PathProgramCache]: Analyzing trace with hash 1271174098, now seen corresponding path program 14 times [2021-01-06 10:03:45,998 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:03:45,998 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062525236] [2021-01-06 10:03:45,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:03:46,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:03:46,231 INFO L134 CoverageAnalysis]: Checked inductivity of 1366 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 1275 trivial. 0 not checked. [2021-01-06 10:03:46,232 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062525236] [2021-01-06 10:03:46,232 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1533545220] [2021-01-06 10:03:46,232 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:03:46,346 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 10:03:46,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:03:46,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 441 conjuncts, 52 conjunts are in the unsatisfiable core [2021-01-06 10:03:46,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:03:46,990 INFO L134 CoverageAnalysis]: Checked inductivity of 1366 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-01-06 10:03:46,990 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:03:46,991 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 53] total 62 [2021-01-06 10:03:46,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449833271] [2021-01-06 10:03:46,991 INFO L461 AbstractCegarLoop]: Interpolant automaton has 62 states [2021-01-06 10:03:46,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:03:46,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2021-01-06 10:03:46,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1890, Invalid=1892, Unknown=0, NotChecked=0, Total=3782 [2021-01-06 10:03:46,994 INFO L87 Difference]: Start difference. First operand 74 states and 76 transitions. Second operand 62 states. [2021-01-06 10:03:47,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:03:47,357 INFO L93 Difference]: Finished difference Result 175 states and 188 transitions. [2021-01-06 10:03:47,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-01-06 10:03:47,358 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 72 [2021-01-06 10:03:47,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:03:47,359 INFO L225 Difference]: With dead ends: 175 [2021-01-06 10:03:47,359 INFO L226 Difference]: Without dead ends: 154 [2021-01-06 10:03:47,361 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2649 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1890, Invalid=1892, Unknown=0, NotChecked=0, Total=3782 [2021-01-06 10:03:47,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-01-06 10:03:47,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 84. [2021-01-06 10:03:47,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2021-01-06 10:03:47,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 86 transitions. [2021-01-06 10:03:47,368 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 86 transitions. Word has length 72 [2021-01-06 10:03:47,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:03:47,368 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 86 transitions. [2021-01-06 10:03:47,369 INFO L482 AbstractCegarLoop]: Interpolant automaton has 62 states. [2021-01-06 10:03:47,369 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 86 transitions. [2021-01-06 10:03:47,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-01-06 10:03:47,370 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:03:47,370 INFO L422 BasicCegarLoop]: trace histogram [59, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:03:47,585 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-01-06 10:03:47,586 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:03:47,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:03:47,587 INFO L82 PathProgramCache]: Analyzing trace with hash -965065229, now seen corresponding path program 15 times [2021-01-06 10:03:47,587 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:03:47,588 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387397241] [2021-01-06 10:03:47,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:03:47,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:03:47,829 INFO L134 CoverageAnalysis]: Checked inductivity of 1875 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 1770 trivial. 0 not checked. [2021-01-06 10:03:47,830 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387397241] [2021-01-06 10:03:47,830 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1876352296] [2021-01-06 10:03:47,830 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:03:51,144 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-01-06 10:03:51,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:03:51,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 16 conjunts are in the unsatisfiable core [2021-01-06 10:03:51,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:03:51,242 INFO L134 CoverageAnalysis]: Checked inductivity of 1875 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 1770 trivial. 0 not checked. [2021-01-06 10:03:51,243 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:03:51,243 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-01-06 10:03:51,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048417582] [2021-01-06 10:03:51,244 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-06 10:03:51,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:03:51,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-06 10:03:51,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2021-01-06 10:03:51,245 INFO L87 Difference]: Start difference. First operand 84 states and 86 transitions. Second operand 18 states. [2021-01-06 10:03:51,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:03:51,370 INFO L93 Difference]: Finished difference Result 166 states and 169 transitions. [2021-01-06 10:03:51,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-01-06 10:03:51,371 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 82 [2021-01-06 10:03:51,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:03:51,372 INFO L225 Difference]: With dead ends: 166 [2021-01-06 10:03:51,372 INFO L226 Difference]: Without dead ends: 160 [2021-01-06 10:03:51,373 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2021-01-06 10:03:51,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-01-06 10:03:51,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 85. [2021-01-06 10:03:51,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2021-01-06 10:03:51,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 87 transitions. [2021-01-06 10:03:51,380 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 87 transitions. Word has length 82 [2021-01-06 10:03:51,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:03:51,381 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 87 transitions. [2021-01-06 10:03:51,381 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2021-01-06 10:03:51,381 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 87 transitions. [2021-01-06 10:03:51,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-01-06 10:03:51,383 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:03:51,383 INFO L422 BasicCegarLoop]: trace histogram [59, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:03:51,598 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-01-06 10:03:51,599 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:03:51,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:03:51,600 INFO L82 PathProgramCache]: Analyzing trace with hash 199195127, now seen corresponding path program 16 times [2021-01-06 10:03:51,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:03:51,600 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594464153] [2021-01-06 10:03:51,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:03:51,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:03:51,865 INFO L134 CoverageAnalysis]: Checked inductivity of 1890 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 1770 trivial. 0 not checked. [2021-01-06 10:03:51,866 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594464153] [2021-01-06 10:03:51,866 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [211849206] [2021-01-06 10:03:51,866 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:03:51,991 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 10:03:51,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:03:51,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 507 conjuncts, 61 conjunts are in the unsatisfiable core [2021-01-06 10:03:51,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:03:52,813 INFO L134 CoverageAnalysis]: Checked inductivity of 1890 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-01-06 10:03:52,814 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:03:52,814 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 62] total 72 [2021-01-06 10:03:52,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509233235] [2021-01-06 10:03:52,815 INFO L461 AbstractCegarLoop]: Interpolant automaton has 72 states [2021-01-06 10:03:52,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:03:52,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2021-01-06 10:03:52,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2555, Invalid=2557, Unknown=0, NotChecked=0, Total=5112 [2021-01-06 10:03:52,818 INFO L87 Difference]: Start difference. First operand 85 states and 87 transitions. Second operand 72 states. [2021-01-06 10:03:53,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:03:53,250 INFO L93 Difference]: Finished difference Result 199 states and 213 transitions. [2021-01-06 10:03:53,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-01-06 10:03:53,250 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 83 [2021-01-06 10:03:53,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:03:53,251 INFO L225 Difference]: With dead ends: 199 [2021-01-06 10:03:53,251 INFO L226 Difference]: Without dead ends: 176 [2021-01-06 10:03:53,254 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3705 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=2555, Invalid=2557, Unknown=0, NotChecked=0, Total=5112 [2021-01-06 10:03:53,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2021-01-06 10:03:53,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 96. [2021-01-06 10:03:53,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2021-01-06 10:03:53,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 98 transitions. [2021-01-06 10:03:53,261 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 98 transitions. Word has length 83 [2021-01-06 10:03:53,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:03:53,261 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 98 transitions. [2021-01-06 10:03:53,261 INFO L482 AbstractCegarLoop]: Interpolant automaton has 72 states. [2021-01-06 10:03:53,261 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 98 transitions. [2021-01-06 10:03:53,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-01-06 10:03:53,262 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:03:53,263 INFO L422 BasicCegarLoop]: trace histogram [69, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:03:53,475 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-01-06 10:03:53,476 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:03:53,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:03:53,477 INFO L82 PathProgramCache]: Analyzing trace with hash 1847475603, now seen corresponding path program 17 times [2021-01-06 10:03:53,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:03:53,477 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245587051] [2021-01-06 10:03:53,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:03:53,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:03:53,737 INFO L134 CoverageAnalysis]: Checked inductivity of 2551 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 2415 trivial. 0 not checked. [2021-01-06 10:03:53,738 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245587051] [2021-01-06 10:03:53,738 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [124003662] [2021-01-06 10:03:53,738 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true