/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/loops-crafted-1/nested_delay_nd.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-06 17:04:45,239 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 17:04:45,242 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 17:04:45,277 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-06 17:04:45,277 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-06 17:04:45,279 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-06 17:04:45,280 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-06 17:04:45,283 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-06 17:04:45,285 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-06 17:04:45,286 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-06 17:04:45,288 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-06 17:04:45,289 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-06 17:04:45,290 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-06 17:04:45,291 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-06 17:04:45,293 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-06 17:04:45,294 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-06 17:04:45,295 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-06 17:04:45,307 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-06 17:04:45,310 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-06 17:04:45,312 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-06 17:04:45,314 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-06 17:04:45,316 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-06 17:04:45,317 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-06 17:04:45,318 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-06 17:04:45,321 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-01-06 17:04:45,325 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-01-06 17:04:45,326 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-01-06 17:04:45,327 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-01-06 17:04:45,328 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-01-06 17:04:45,329 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-01-06 17:04:45,329 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-01-06 17:04:45,330 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-01-06 17:04:45,331 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-01-06 17:04:45,331 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 17:04:45,332 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 17:04:45,333 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 17:04:45,334 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 17:04:45,369 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 17:04:45,369 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 17:04:45,374 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 17:04:45,374 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 17:04:45,374 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 17:04:45,375 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 17:04:45,375 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 17:04:45,377 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 17:04:45,377 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 17:04:45,377 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 17:04:45,378 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 17:04:45,378 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 17:04:45,378 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 17:04:45,378 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 17:04:45,378 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 17:04:45,379 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 17:04:45,379 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 17:04:45,380 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 17:04:45,380 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 17:04:45,381 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 17:04:45,381 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 17:04:45,381 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 17:04:45,381 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 17:04:45,381 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 17:04:45,381 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 17:04:45,382 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 17:04:45,839 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 17:04:45,881 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 17:04:45,885 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 17:04:45,886 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 17:04:45,887 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 17:04:45,888 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops-crafted-1/nested_delay_nd.c [2021-01-06 17:04:45,980 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/f37596fd7/c44fa47b26204d4b8df8ddc8fb05891a/FLAG669e4f41a [2021-01-06 17:04:46,615 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 17:04:46,616 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/loops-crafted-1/nested_delay_nd.c [2021-01-06 17:04:46,623 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/f37596fd7/c44fa47b26204d4b8df8ddc8fb05891a/FLAG669e4f41a [2021-01-06 17:04:46,989 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/f37596fd7/c44fa47b26204d4b8df8ddc8fb05891a [2021-01-06 17:04:46,993 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 17:04:46,995 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 17:04:46,997 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 17:04:46,998 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 17:04:47,001 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 17:04:47,003 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 05:04:46" (1/1) ... [2021-01-06 17:04:47,005 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@475719a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:04:47, skipping insertion in model container [2021-01-06 17:04:47,006 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 05:04:46" (1/1) ... [2021-01-06 17:04:47,015 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 17:04:47,034 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-01-06 17:04:47,194 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/loops-crafted-1/nested_delay_nd.c[465,478] left hand side expression in assignment: lhs: VariableLHS[~last~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~st~0,] left hand side expression in assignment: lhs: VariableLHS[~c~0,] left hand side expression in assignment: lhs: VariableLHS[~st~0,] left hand side expression in assignment: lhs: VariableLHS[~a~0,] left hand side expression in assignment: lhs: VariableLHS[~a~0,] left hand side expression in assignment: lhs: VariableLHS[~b~0,] [2021-01-06 17:04:47,222 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 17:04:47,235 INFO L203 MainTranslator]: Completed pre-run [2021-01-06 17:04:47,254 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/loops-crafted-1/nested_delay_nd.c[465,478] left hand side expression in assignment: lhs: VariableLHS[~last~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~st~0,] left hand side expression in assignment: lhs: VariableLHS[~c~0,] left hand side expression in assignment: lhs: VariableLHS[~st~0,] left hand side expression in assignment: lhs: VariableLHS[~a~0,] left hand side expression in assignment: lhs: VariableLHS[~a~0,] left hand side expression in assignment: lhs: VariableLHS[~b~0,] [2021-01-06 17:04:47,282 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 17:04:47,304 INFO L208 MainTranslator]: Completed translation [2021-01-06 17:04:47,304 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:04:47 WrapperNode [2021-01-06 17:04:47,304 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 17:04:47,308 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 17:04:47,309 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 17:04:47,309 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 17:04:47,318 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:04:47" (1/1) ... [2021-01-06 17:04:47,328 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:04:47" (1/1) ... [2021-01-06 17:04:47,361 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 17:04:47,364 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 17:04:47,365 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 17:04:47,366 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 17:04:47,378 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:04:47" (1/1) ... [2021-01-06 17:04:47,379 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:04:47" (1/1) ... [2021-01-06 17:04:47,393 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:04:47" (1/1) ... [2021-01-06 17:04:47,393 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:04:47" (1/1) ... [2021-01-06 17:04:47,399 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:04:47" (1/1) ... [2021-01-06 17:04:47,417 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:04:47" (1/1) ... [2021-01-06 17:04:47,418 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:04:47" (1/1) ... [2021-01-06 17:04:47,425 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 17:04:47,426 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 17:04:47,427 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 17:04:47,427 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 17:04:47,428 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:04:47" (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 17:04:47,580 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 17:04:47,580 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 17:04:47,581 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 17:04:47,581 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 17:04:48,031 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 17:04:48,031 INFO L299 CfgBuilder]: Removed 10 assume(true) statements. [2021-01-06 17:04:48,033 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 05:04:48 BoogieIcfgContainer [2021-01-06 17:04:48,034 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 17:04:48,078 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 17:04:48,078 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 17:04:48,086 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 17:04:48,087 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 05:04:46" (1/3) ... [2021-01-06 17:04:48,091 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6beac4b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 05:04:48, skipping insertion in model container [2021-01-06 17:04:48,091 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:04:47" (2/3) ... [2021-01-06 17:04:48,092 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6beac4b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 05:04:48, skipping insertion in model container [2021-01-06 17:04:48,095 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 05:04:48" (3/3) ... [2021-01-06 17:04:48,102 INFO L111 eAbstractionObserver]: Analyzing ICFG nested_delay_nd.c [2021-01-06 17:04:48,141 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 17:04:48,146 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-01-06 17:04:48,166 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-01-06 17:04:48,195 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 17:04:48,195 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 17:04:48,196 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 17:04:48,196 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 17:04:48,196 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 17:04:48,196 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 17:04:48,196 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 17:04:48,197 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 17:04:48,213 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2021-01-06 17:04:48,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-01-06 17:04:48,218 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:04:48,219 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:04:48,220 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:04:48,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:04:48,226 INFO L82 PathProgramCache]: Analyzing trace with hash -493598204, now seen corresponding path program 1 times [2021-01-06 17:04:48,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:04:48,238 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360941711] [2021-01-06 17:04:48,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:04:48,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:04:48,404 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 17:04:48,405 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360941711] [2021-01-06 17:04:48,406 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 17:04:48,406 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-01-06 17:04:48,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283140021] [2021-01-06 17:04:48,412 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-01-06 17:04:48,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:04:48,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-01-06 17:04:48,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-01-06 17:04:48,431 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 2 states. [2021-01-06 17:04:48,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:04:48,450 INFO L93 Difference]: Finished difference Result 33 states and 53 transitions. [2021-01-06 17:04:48,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-01-06 17:04:48,452 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 12 [2021-01-06 17:04:48,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:04:48,461 INFO L225 Difference]: With dead ends: 33 [2021-01-06 17:04:48,461 INFO L226 Difference]: Without dead ends: 16 [2021-01-06 17:04:48,465 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-01-06 17:04:48,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-01-06 17:04:48,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2021-01-06 17:04:48,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2021-01-06 17:04:48,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 22 transitions. [2021-01-06 17:04:48,501 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 22 transitions. Word has length 12 [2021-01-06 17:04:48,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:04:48,502 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 22 transitions. [2021-01-06 17:04:48,502 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2021-01-06 17:04:48,502 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 22 transitions. [2021-01-06 17:04:48,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-01-06 17:04:48,503 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:04:48,503 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:04:48,503 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-06 17:04:48,504 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:04:48,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:04:48,505 INFO L82 PathProgramCache]: Analyzing trace with hash -2059231113, now seen corresponding path program 1 times [2021-01-06 17:04:48,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:04:48,505 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538151366] [2021-01-06 17:04:48,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:04:48,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:04:48,619 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 17:04:48,619 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538151366] [2021-01-06 17:04:48,619 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 17:04:48,620 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 17:04:48,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100689506] [2021-01-06 17:04:48,621 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-01-06 17:04:48,622 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:04:48,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-01-06 17:04:48,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-01-06 17:04:48,623 INFO L87 Difference]: Start difference. First operand 16 states and 22 transitions. Second operand 4 states. [2021-01-06 17:04:48,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:04:48,694 INFO L93 Difference]: Finished difference Result 32 states and 46 transitions. [2021-01-06 17:04:48,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-06 17:04:48,695 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2021-01-06 17:04:48,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:04:48,696 INFO L225 Difference]: With dead ends: 32 [2021-01-06 17:04:48,696 INFO L226 Difference]: Without dead ends: 20 [2021-01-06 17:04:48,697 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-01-06 17:04:48,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-01-06 17:04:48,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 17. [2021-01-06 17:04:48,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2021-01-06 17:04:48,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 23 transitions. [2021-01-06 17:04:48,702 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 23 transitions. Word has length 12 [2021-01-06 17:04:48,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:04:48,703 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 23 transitions. [2021-01-06 17:04:48,703 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-01-06 17:04:48,703 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 23 transitions. [2021-01-06 17:04:48,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-01-06 17:04:48,704 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:04:48,704 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:04:48,704 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-01-06 17:04:48,704 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:04:48,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:04:48,705 INFO L82 PathProgramCache]: Analyzing trace with hash 573171571, now seen corresponding path program 1 times [2021-01-06 17:04:48,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:04:48,706 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149502700] [2021-01-06 17:04:48,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:04:48,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:04:48,756 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 17:04:48,757 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149502700] [2021-01-06 17:04:48,757 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 17:04:48,758 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 17:04:48,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19646008] [2021-01-06 17:04:48,761 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 17:04:48,762 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:04:48,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 17:04:48,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 17:04:48,763 INFO L87 Difference]: Start difference. First operand 17 states and 23 transitions. Second operand 3 states. [2021-01-06 17:04:48,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:04:48,841 INFO L93 Difference]: Finished difference Result 38 states and 53 transitions. [2021-01-06 17:04:48,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 17:04:48,842 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2021-01-06 17:04:48,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:04:48,843 INFO L225 Difference]: With dead ends: 38 [2021-01-06 17:04:48,843 INFO L226 Difference]: Without dead ends: 25 [2021-01-06 17:04:48,844 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 17:04:48,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-01-06 17:04:48,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 18. [2021-01-06 17:04:48,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2021-01-06 17:04:48,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 24 transitions. [2021-01-06 17:04:48,853 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 24 transitions. Word has length 15 [2021-01-06 17:04:48,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:04:48,853 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 24 transitions. [2021-01-06 17:04:48,853 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 17:04:48,853 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 24 transitions. [2021-01-06 17:04:48,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-01-06 17:04:48,854 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:04:48,854 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:04:48,854 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-01-06 17:04:48,855 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:04:48,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:04:48,855 INFO L82 PathProgramCache]: Analyzing trace with hash 630429873, now seen corresponding path program 1 times [2021-01-06 17:04:48,856 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:04:48,856 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486993670] [2021-01-06 17:04:48,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:04:48,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:04:49,006 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 17:04:49,007 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486993670] [2021-01-06 17:04:49,010 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 17:04:49,011 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 17:04:49,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509607889] [2021-01-06 17:04:49,012 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-01-06 17:04:49,012 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:04:49,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-01-06 17:04:49,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-01-06 17:04:49,016 INFO L87 Difference]: Start difference. First operand 18 states and 24 transitions. Second operand 4 states. [2021-01-06 17:04:49,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:04:49,068 INFO L93 Difference]: Finished difference Result 46 states and 64 transitions. [2021-01-06 17:04:49,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-06 17:04:49,069 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2021-01-06 17:04:49,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:04:49,072 INFO L225 Difference]: With dead ends: 46 [2021-01-06 17:04:49,072 INFO L226 Difference]: Without dead ends: 32 [2021-01-06 17:04:49,073 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-01-06 17:04:49,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-01-06 17:04:49,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2021-01-06 17:04:49,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2021-01-06 17:04:49,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 42 transitions. [2021-01-06 17:04:49,082 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 42 transitions. Word has length 15 [2021-01-06 17:04:49,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:04:49,082 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 42 transitions. [2021-01-06 17:04:49,082 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-01-06 17:04:49,083 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 42 transitions. [2021-01-06 17:04:49,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-01-06 17:04:49,083 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:04:49,083 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:04:49,084 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-01-06 17:04:49,084 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:04:49,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:04:49,085 INFO L82 PathProgramCache]: Analyzing trace with hash 630489455, now seen corresponding path program 1 times [2021-01-06 17:04:49,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:04:49,085 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990820208] [2021-01-06 17:04:49,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:04:49,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:04:49,211 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 17:04:49,212 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990820208] [2021-01-06 17:04:49,212 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2136439612] [2021-01-06 17:04:49,212 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 17:04:49,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:04:49,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 4 conjunts are in the unsatisfiable core [2021-01-06 17:04:49,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:04:49,391 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 17:04:49,392 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:04:49,392 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2021-01-06 17:04:49,392 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134812679] [2021-01-06 17:04:49,393 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-06 17:04:49,393 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:04:49,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-06 17:04:49,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2021-01-06 17:04:49,395 INFO L87 Difference]: Start difference. First operand 30 states and 42 transitions. Second operand 7 states. [2021-01-06 17:04:49,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:04:49,476 INFO L93 Difference]: Finished difference Result 67 states and 97 transitions. [2021-01-06 17:04:49,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 17:04:49,477 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 15 [2021-01-06 17:04:49,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:04:49,478 INFO L225 Difference]: With dead ends: 67 [2021-01-06 17:04:49,478 INFO L226 Difference]: Without dead ends: 41 [2021-01-06 17:04:49,479 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 13 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 17:04:49,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-01-06 17:04:49,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 36. [2021-01-06 17:04:49,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2021-01-06 17:04:49,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 50 transitions. [2021-01-06 17:04:49,489 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 50 transitions. Word has length 15 [2021-01-06 17:04:49,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:04:49,489 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 50 transitions. [2021-01-06 17:04:49,489 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-06 17:04:49,490 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 50 transitions. [2021-01-06 17:04:49,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-01-06 17:04:49,490 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:04:49,491 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:04:49,704 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:04:49,705 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:04:49,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:04:49,707 INFO L82 PathProgramCache]: Analyzing trace with hash 730990835, now seen corresponding path program 2 times [2021-01-06 17:04:49,708 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:04:49,708 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229847740] [2021-01-06 17:04:49,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:04:49,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:04:49,830 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:04:49,830 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229847740] [2021-01-06 17:04:49,831 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [534013204] [2021-01-06 17:04:49,832 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:04:49,895 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 17:04:49,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:04:49,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 5 conjunts are in the unsatisfiable core [2021-01-06 17:04:49,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:04:50,024 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-01-06 17:04:50,025 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:04:50,025 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-01-06 17:04:50,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29998838] [2021-01-06 17:04:50,026 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-01-06 17:04:50,026 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:04:50,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-01-06 17:04:50,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-01-06 17:04:50,028 INFO L87 Difference]: Start difference. First operand 36 states and 50 transitions. Second operand 9 states. [2021-01-06 17:04:50,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:04:50,279 INFO L93 Difference]: Finished difference Result 123 states and 179 transitions. [2021-01-06 17:04:50,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 17:04:50,280 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 18 [2021-01-06 17:04:50,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:04:50,282 INFO L225 Difference]: With dead ends: 123 [2021-01-06 17:04:50,282 INFO L226 Difference]: Without dead ends: 91 [2021-01-06 17:04:50,284 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2021-01-06 17:04:50,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-01-06 17:04:50,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 76. [2021-01-06 17:04:50,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2021-01-06 17:04:50,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 103 transitions. [2021-01-06 17:04:50,302 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 103 transitions. Word has length 18 [2021-01-06 17:04:50,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:04:50,302 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 103 transitions. [2021-01-06 17:04:50,302 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-01-06 17:04:50,302 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 103 transitions. [2021-01-06 17:04:50,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-01-06 17:04:50,304 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:04:50,304 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:04:50,517 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:04:50,518 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:04:50,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:04:50,520 INFO L82 PathProgramCache]: Analyzing trace with hash -104466575, now seen corresponding path program 1 times [2021-01-06 17:04:50,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:04:50,521 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942286795] [2021-01-06 17:04:50,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:04:50,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:04:50,653 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:04:50,654 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942286795] [2021-01-06 17:04:50,654 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [664756810] [2021-01-06 17:04:50,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:04:50,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:04:50,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 6 conjunts are in the unsatisfiable core [2021-01-06 17:04:50,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:04:50,854 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:04:50,855 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:04:50,855 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-01-06 17:04:50,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643802965] [2021-01-06 17:04:50,856 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-06 17:04:50,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:04:50,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-06 17:04:50,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=61, Unknown=0, NotChecked=0, Total=110 [2021-01-06 17:04:50,862 INFO L87 Difference]: Start difference. First operand 76 states and 103 transitions. Second operand 11 states. [2021-01-06 17:04:51,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:04:51,017 INFO L93 Difference]: Finished difference Result 199 states and 271 transitions. [2021-01-06 17:04:51,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-01-06 17:04:51,018 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 21 [2021-01-06 17:04:51,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:04:51,027 INFO L225 Difference]: With dead ends: 199 [2021-01-06 17:04:51,027 INFO L226 Difference]: Without dead ends: 127 [2021-01-06 17:04:51,029 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=49, Invalid=61, Unknown=0, NotChecked=0, Total=110 [2021-01-06 17:04:51,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-01-06 17:04:51,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 88. [2021-01-06 17:04:51,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2021-01-06 17:04:51,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 119 transitions. [2021-01-06 17:04:51,069 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 119 transitions. Word has length 21 [2021-01-06 17:04:51,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:04:51,069 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 119 transitions. [2021-01-06 17:04:51,069 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-01-06 17:04:51,069 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 119 transitions. [2021-01-06 17:04:51,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-01-06 17:04:51,073 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:04:51,074 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:04:51,274 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:04:51,275 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:04:51,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:04:51,277 INFO L82 PathProgramCache]: Analyzing trace with hash 1399176113, now seen corresponding path program 2 times [2021-01-06 17:04:51,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:04:51,278 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906728066] [2021-01-06 17:04:51,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:04:51,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:04:51,384 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:04:51,385 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906728066] [2021-01-06 17:04:51,386 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1178990207] [2021-01-06 17:04:51,386 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 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 17:04:51,446 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 17:04:51,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:04:51,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 6 conjunts are in the unsatisfiable core [2021-01-06 17:04:51,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:04:51,546 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-01-06 17:04:51,547 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:04:51,547 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2021-01-06 17:04:51,547 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571276613] [2021-01-06 17:04:51,548 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-01-06 17:04:51,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:04:51,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-01-06 17:04:51,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-01-06 17:04:51,549 INFO L87 Difference]: Start difference. First operand 88 states and 119 transitions. Second operand 12 states. [2021-01-06 17:04:51,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:04:51,833 INFO L93 Difference]: Finished difference Result 291 states and 407 transitions. [2021-01-06 17:04:51,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-01-06 17:04:51,833 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 24 [2021-01-06 17:04:51,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:04:51,835 INFO L225 Difference]: With dead ends: 291 [2021-01-06 17:04:51,835 INFO L226 Difference]: Without dead ends: 207 [2021-01-06 17:04:51,836 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=156, Invalid=306, Unknown=0, NotChecked=0, Total=462 [2021-01-06 17:04:51,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2021-01-06 17:04:51,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 146. [2021-01-06 17:04:51,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2021-01-06 17:04:51,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 198 transitions. [2021-01-06 17:04:51,857 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 198 transitions. Word has length 24 [2021-01-06 17:04:51,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:04:51,858 INFO L481 AbstractCegarLoop]: Abstraction has 146 states and 198 transitions. [2021-01-06 17:04:51,858 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-01-06 17:04:51,858 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 198 transitions. [2021-01-06 17:04:51,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-01-06 17:04:51,860 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:04:51,860 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:04:52,073 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:04:52,074 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:04:52,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:04:52,075 INFO L82 PathProgramCache]: Analyzing trace with hash -2084547665, now seen corresponding path program 3 times [2021-01-06 17:04:52,076 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:04:52,076 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229810048] [2021-01-06 17:04:52,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:04:52,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:04:52,158 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:04:52,158 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229810048] [2021-01-06 17:04:52,159 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1089365250] [2021-01-06 17:04:52,159 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 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 17:04:52,211 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-01-06 17:04:52,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:04:52,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 3 conjunts are in the unsatisfiable core [2021-01-06 17:04:52,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:04:52,262 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-01-06 17:04:52,263 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:04:52,263 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [8] total 11 [2021-01-06 17:04:52,263 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732718255] [2021-01-06 17:04:52,264 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-01-06 17:04:52,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:04:52,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-01-06 17:04:52,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-01-06 17:04:52,265 INFO L87 Difference]: Start difference. First operand 146 states and 198 transitions. Second operand 4 states. [2021-01-06 17:04:52,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:04:52,327 INFO L93 Difference]: Finished difference Result 334 states and 454 transitions. [2021-01-06 17:04:52,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-06 17:04:52,327 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2021-01-06 17:04:52,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:04:52,329 INFO L225 Difference]: With dead ends: 334 [2021-01-06 17:04:52,329 INFO L226 Difference]: Without dead ends: 192 [2021-01-06 17:04:52,330 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-01-06 17:04:52,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2021-01-06 17:04:52,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 164. [2021-01-06 17:04:52,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2021-01-06 17:04:52,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 206 transitions. [2021-01-06 17:04:52,348 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 206 transitions. Word has length 27 [2021-01-06 17:04:52,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:04:52,349 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 206 transitions. [2021-01-06 17:04:52,349 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-01-06 17:04:52,349 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 206 transitions. [2021-01-06 17:04:52,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-01-06 17:04:52,350 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:04:52,350 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:04:52,565 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:04:52,566 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:04:52,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:04:52,567 INFO L82 PathProgramCache]: Analyzing trace with hash 1868779761, now seen corresponding path program 1 times [2021-01-06 17:04:52,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:04:52,568 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945251764] [2021-01-06 17:04:52,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:04:52,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:04:52,612 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-01-06 17:04:52,612 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945251764] [2021-01-06 17:04:52,613 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 17:04:52,613 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 17:04:52,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535536677] [2021-01-06 17:04:52,613 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 17:04:52,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:04:52,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 17:04:52,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 17:04:52,614 INFO L87 Difference]: Start difference. First operand 164 states and 206 transitions. Second operand 3 states. [2021-01-06 17:04:52,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:04:52,647 INFO L93 Difference]: Finished difference Result 344 states and 436 transitions. [2021-01-06 17:04:52,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 17:04:52,648 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2021-01-06 17:04:52,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:04:52,650 INFO L225 Difference]: With dead ends: 344 [2021-01-06 17:04:52,650 INFO L226 Difference]: Without dead ends: 184 [2021-01-06 17:04:52,651 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 17:04:52,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2021-01-06 17:04:52,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 162. [2021-01-06 17:04:52,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2021-01-06 17:04:52,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 200 transitions. [2021-01-06 17:04:52,675 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 200 transitions. Word has length 27 [2021-01-06 17:04:52,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:04:52,678 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 200 transitions. [2021-01-06 17:04:52,678 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 17:04:52,679 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 200 transitions. [2021-01-06 17:04:52,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-01-06 17:04:52,687 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:04:52,687 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:04:52,687 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-01-06 17:04:52,689 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:04:52,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:04:52,689 INFO L82 PathProgramCache]: Analyzing trace with hash 1323368939, now seen corresponding path program 1 times [2021-01-06 17:04:52,690 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:04:52,690 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232210551] [2021-01-06 17:04:52,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:04:52,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:04:52,750 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-01-06 17:04:52,750 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232210551] [2021-01-06 17:04:52,750 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 17:04:52,750 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 17:04:52,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237224967] [2021-01-06 17:04:52,751 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 17:04:52,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:04:52,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 17:04:52,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 17:04:52,752 INFO L87 Difference]: Start difference. First operand 162 states and 200 transitions. Second operand 3 states. [2021-01-06 17:04:52,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:04:52,776 INFO L93 Difference]: Finished difference Result 256 states and 318 transitions. [2021-01-06 17:04:52,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 17:04:52,776 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2021-01-06 17:04:52,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:04:52,777 INFO L225 Difference]: With dead ends: 256 [2021-01-06 17:04:52,778 INFO L226 Difference]: Without dead ends: 176 [2021-01-06 17:04:52,778 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 17:04:52,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2021-01-06 17:04:52,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 166. [2021-01-06 17:04:52,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2021-01-06 17:04:52,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 200 transitions. [2021-01-06 17:04:52,791 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 200 transitions. Word has length 28 [2021-01-06 17:04:52,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:04:52,792 INFO L481 AbstractCegarLoop]: Abstraction has 166 states and 200 transitions. [2021-01-06 17:04:52,792 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 17:04:52,792 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 200 transitions. [2021-01-06 17:04:52,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-01-06 17:04:52,793 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:04:52,793 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:04:52,793 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-01-06 17:04:52,793 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:04:52,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:04:52,794 INFO L82 PathProgramCache]: Analyzing trace with hash 1325275563, now seen corresponding path program 1 times [2021-01-06 17:04:52,794 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:04:52,794 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425480699] [2021-01-06 17:04:52,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:04:52,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:04:52,875 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:04:52,876 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425480699] [2021-01-06 17:04:52,876 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [227587] [2021-01-06 17:04:52,876 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 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 17:04:52,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:04:52,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 8 conjunts are in the unsatisfiable core [2021-01-06 17:04:52,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:04:53,051 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:04:53,051 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:04:53,052 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-01-06 17:04:53,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277146762] [2021-01-06 17:04:53,052 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-01-06 17:04:53,053 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:04:53,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-01-06 17:04:53,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=120, Unknown=0, NotChecked=0, Total=210 [2021-01-06 17:04:53,054 INFO L87 Difference]: Start difference. First operand 166 states and 200 transitions. Second operand 15 states. [2021-01-06 17:04:53,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:04:53,213 INFO L93 Difference]: Finished difference Result 457 states and 547 transitions. [2021-01-06 17:04:53,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 17:04:53,213 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 28 [2021-01-06 17:04:53,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:04:53,218 INFO L225 Difference]: With dead ends: 457 [2021-01-06 17:04:53,218 INFO L226 Difference]: Without dead ends: 295 [2021-01-06 17:04:53,219 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=120, Unknown=0, NotChecked=0, Total=210 [2021-01-06 17:04:53,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2021-01-06 17:04:53,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 196. [2021-01-06 17:04:53,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2021-01-06 17:04:53,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 234 transitions. [2021-01-06 17:04:53,237 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 234 transitions. Word has length 28 [2021-01-06 17:04:53,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:04:53,237 INFO L481 AbstractCegarLoop]: Abstraction has 196 states and 234 transitions. [2021-01-06 17:04:53,237 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2021-01-06 17:04:53,237 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 234 transitions. [2021-01-06 17:04:53,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-01-06 17:04:53,244 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:04:53,245 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:04:53,459 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:04:53,460 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:04:53,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:04:53,461 INFO L82 PathProgramCache]: Analyzing trace with hash 399501479, now seen corresponding path program 2 times [2021-01-06 17:04:53,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:04:53,461 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711970387] [2021-01-06 17:04:53,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:04:53,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:04:53,559 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:04:53,559 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711970387] [2021-01-06 17:04:53,559 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662697174] [2021-01-06 17:04:53,560 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:04:53,613 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 17:04:53,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:04:53,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-06 17:04:53,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:04:53,770 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:04:53,770 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:04:53,770 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-01-06 17:04:53,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891739953] [2021-01-06 17:04:53,771 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 17:04:53,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:04:53,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 17:04:53,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=157, Unknown=0, NotChecked=0, Total=272 [2021-01-06 17:04:53,773 INFO L87 Difference]: Start difference. First operand 196 states and 234 transitions. Second operand 17 states. [2021-01-06 17:04:53,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:04:53,912 INFO L93 Difference]: Finished difference Result 517 states and 615 transitions. [2021-01-06 17:04:53,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 17:04:53,912 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 31 [2021-01-06 17:04:53,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:04:53,914 INFO L225 Difference]: With dead ends: 517 [2021-01-06 17:04:53,915 INFO L226 Difference]: Without dead ends: 325 [2021-01-06 17:04:53,915 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=115, Invalid=157, Unknown=0, NotChecked=0, Total=272 [2021-01-06 17:04:53,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2021-01-06 17:04:53,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 226. [2021-01-06 17:04:53,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 226 states. [2021-01-06 17:04:53,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 268 transitions. [2021-01-06 17:04:53,933 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 268 transitions. Word has length 31 [2021-01-06 17:04:53,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:04:53,934 INFO L481 AbstractCegarLoop]: Abstraction has 226 states and 268 transitions. [2021-01-06 17:04:53,934 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 17:04:53,934 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 268 transitions. [2021-01-06 17:04:53,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-01-06 17:04:53,934 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:04:53,935 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:04:54,149 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:04:54,150 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:04:54,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:04:54,151 INFO L82 PathProgramCache]: Analyzing trace with hash -1351227349, now seen corresponding path program 3 times [2021-01-06 17:04:54,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:04:54,152 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854313230] [2021-01-06 17:04:54,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:04:54,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:04:54,283 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:04:54,283 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854313230] [2021-01-06 17:04:54,284 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2030671981] [2021-01-06 17:04:54,284 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:04:54,337 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-01-06 17:04:54,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:04:54,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 7 conjunts are in the unsatisfiable core [2021-01-06 17:04:54,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:04:54,441 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-01-06 17:04:54,441 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:04:54,442 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 14 [2021-01-06 17:04:54,442 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183321266] [2021-01-06 17:04:54,442 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 17:04:54,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:04:54,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 17:04:54,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2021-01-06 17:04:54,443 INFO L87 Difference]: Start difference. First operand 226 states and 268 transitions. Second operand 5 states. [2021-01-06 17:04:54,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:04:54,541 INFO L93 Difference]: Finished difference Result 229 states and 270 transitions. [2021-01-06 17:04:54,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 17:04:54,542 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 34 [2021-01-06 17:04:54,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:04:54,543 INFO L225 Difference]: With dead ends: 229 [2021-01-06 17:04:54,543 INFO L226 Difference]: Without dead ends: 169 [2021-01-06 17:04:54,544 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-01-06 17:04:54,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-01-06 17:04:54,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 168. [2021-01-06 17:04:54,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2021-01-06 17:04:54,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 201 transitions. [2021-01-06 17:04:54,558 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 201 transitions. Word has length 34 [2021-01-06 17:04:54,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:04:54,558 INFO L481 AbstractCegarLoop]: Abstraction has 168 states and 201 transitions. [2021-01-06 17:04:54,558 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 17:04:54,558 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 201 transitions. [2021-01-06 17:04:54,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-01-06 17:04:54,559 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:04:54,560 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:04:54,772 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-01-06 17:04:54,773 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:04:54,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:04:54,774 INFO L82 PathProgramCache]: Analyzing trace with hash -1860700439, now seen corresponding path program 1 times [2021-01-06 17:04:54,774 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:04:54,775 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035884958] [2021-01-06 17:04:54,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:04:54,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:04:54,864 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:04:54,864 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035884958] [2021-01-06 17:04:54,865 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [222223289] [2021-01-06 17:04:54,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:04:54,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:04:54,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 17:04:54,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:04:55,093 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:04:55,094 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:04:55,094 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-01-06 17:04:55,097 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424043715] [2021-01-06 17:04:55,098 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-06 17:04:55,098 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:04:55,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-06 17:04:55,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=199, Unknown=0, NotChecked=0, Total=342 [2021-01-06 17:04:55,101 INFO L87 Difference]: Start difference. First operand 168 states and 201 transitions. Second operand 19 states. [2021-01-06 17:04:55,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:04:55,284 INFO L93 Difference]: Finished difference Result 451 states and 537 transitions. [2021-01-06 17:04:55,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 17:04:55,284 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 34 [2021-01-06 17:04:55,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:04:55,286 INFO L225 Difference]: With dead ends: 451 [2021-01-06 17:04:55,287 INFO L226 Difference]: Without dead ends: 287 [2021-01-06 17:04:55,288 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=143, Invalid=199, Unknown=0, NotChecked=0, Total=342 [2021-01-06 17:04:55,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2021-01-06 17:04:55,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 192. [2021-01-06 17:04:55,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2021-01-06 17:04:55,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 229 transitions. [2021-01-06 17:04:55,304 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 229 transitions. Word has length 34 [2021-01-06 17:04:55,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:04:55,304 INFO L481 AbstractCegarLoop]: Abstraction has 192 states and 229 transitions. [2021-01-06 17:04:55,304 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-06 17:04:55,304 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 229 transitions. [2021-01-06 17:04:55,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-01-06 17:04:55,305 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:04:55,305 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:04:55,519 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-01-06 17:04:55,520 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:04:55,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:04:55,521 INFO L82 PathProgramCache]: Analyzing trace with hash 1470700201, now seen corresponding path program 2 times [2021-01-06 17:04:55,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:04:55,522 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976321957] [2021-01-06 17:04:55,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:04:55,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:04:55,639 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:04:55,640 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976321957] [2021-01-06 17:04:55,640 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1846691285] [2021-01-06 17:04:55,640 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:04:55,702 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 17:04:55,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:04:55,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 17:04:55,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:04:55,914 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:04:55,914 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:04:55,914 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-01-06 17:04:55,915 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245078873] [2021-01-06 17:04:55,916 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-06 17:04:55,916 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:04:55,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-06 17:04:55,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=246, Unknown=0, NotChecked=0, Total=420 [2021-01-06 17:04:55,918 INFO L87 Difference]: Start difference. First operand 192 states and 229 transitions. Second operand 21 states. [2021-01-06 17:04:56,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:04:56,094 INFO L93 Difference]: Finished difference Result 499 states and 593 transitions. [2021-01-06 17:04:56,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 17:04:56,094 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 37 [2021-01-06 17:04:56,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:04:56,096 INFO L225 Difference]: With dead ends: 499 [2021-01-06 17:04:56,097 INFO L226 Difference]: Without dead ends: 311 [2021-01-06 17:04:56,097 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=174, Invalid=246, Unknown=0, NotChecked=0, Total=420 [2021-01-06 17:04:56,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2021-01-06 17:04:56,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 216. [2021-01-06 17:04:56,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 216 states. [2021-01-06 17:04:56,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 257 transitions. [2021-01-06 17:04:56,115 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 257 transitions. Word has length 37 [2021-01-06 17:04:56,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:04:56,116 INFO L481 AbstractCegarLoop]: Abstraction has 216 states and 257 transitions. [2021-01-06 17:04:56,116 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2021-01-06 17:04:56,116 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 257 transitions. [2021-01-06 17:04:56,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-01-06 17:04:56,116 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:04:56,117 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:04:56,329 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-01-06 17:04:56,330 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:04:56,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:04:56,332 INFO L82 PathProgramCache]: Analyzing trace with hash -877109527, now seen corresponding path program 3 times [2021-01-06 17:04:56,332 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:04:56,332 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663070158] [2021-01-06 17:04:56,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:04:56,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:04:56,459 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:04:56,460 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663070158] [2021-01-06 17:04:56,461 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [575279754] [2021-01-06 17:04:56,461 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:04:56,518 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-01-06 17:04:56,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:04:56,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-06 17:04:56,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:04:56,665 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 17:04:56,691 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2021-01-06 17:04:56,691 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:04:56,691 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [12] total 19 [2021-01-06 17:04:56,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294126586] [2021-01-06 17:04:56,692 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-06 17:04:56,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:04:56,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-06 17:04:56,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=256, Unknown=0, NotChecked=0, Total=342 [2021-01-06 17:04:56,693 INFO L87 Difference]: Start difference. First operand 216 states and 257 transitions. Second operand 8 states. [2021-01-06 17:04:56,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:04:56,831 INFO L93 Difference]: Finished difference Result 496 states and 586 transitions. [2021-01-06 17:04:56,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 17:04:56,832 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 40 [2021-01-06 17:04:56,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:04:56,835 INFO L225 Difference]: With dead ends: 496 [2021-01-06 17:04:56,835 INFO L226 Difference]: Without dead ends: 494 [2021-01-06 17:04:56,836 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=290, Unknown=0, NotChecked=0, Total=380 [2021-01-06 17:04:56,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 494 states. [2021-01-06 17:04:56,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 494 to 306. [2021-01-06 17:04:56,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 306 states. [2021-01-06 17:04:56,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 361 transitions. [2021-01-06 17:04:56,877 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 361 transitions. Word has length 40 [2021-01-06 17:04:56,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:04:56,877 INFO L481 AbstractCegarLoop]: Abstraction has 306 states and 361 transitions. [2021-01-06 17:04:56,877 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-01-06 17:04:56,878 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 361 transitions. [2021-01-06 17:04:56,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-01-06 17:04:56,878 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:04:56,878 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:04:57,092 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-01-06 17:04:57,093 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:04:57,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:04:57,094 INFO L82 PathProgramCache]: Analyzing trace with hash -1950517015, now seen corresponding path program 1 times [2021-01-06 17:04:57,094 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:04:57,094 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167880344] [2021-01-06 17:04:57,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:04:57,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:04:57,218 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:04:57,218 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167880344] [2021-01-06 17:04:57,218 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1145977181] [2021-01-06 17:04:57,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:04:57,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:04:57,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-06 17:04:57,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:04:57,465 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:04:57,465 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:04:57,465 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-01-06 17:04:57,466 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428291215] [2021-01-06 17:04:57,466 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-01-06 17:04:57,466 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:04:57,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-01-06 17:04:57,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=298, Unknown=0, NotChecked=0, Total=506 [2021-01-06 17:04:57,467 INFO L87 Difference]: Start difference. First operand 306 states and 361 transitions. Second operand 23 states. [2021-01-06 17:04:57,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:04:57,679 INFO L93 Difference]: Finished difference Result 669 states and 793 transitions. [2021-01-06 17:04:57,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-01-06 17:04:57,680 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 40 [2021-01-06 17:04:57,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:04:57,682 INFO L225 Difference]: With dead ends: 669 [2021-01-06 17:04:57,682 INFO L226 Difference]: Without dead ends: 439 [2021-01-06 17:04:57,683 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=208, Invalid=298, Unknown=0, NotChecked=0, Total=506 [2021-01-06 17:04:57,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2021-01-06 17:04:57,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 339. [2021-01-06 17:04:57,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 339 states. [2021-01-06 17:04:57,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 399 transitions. [2021-01-06 17:04:57,713 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 399 transitions. Word has length 40 [2021-01-06 17:04:57,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:04:57,714 INFO L481 AbstractCegarLoop]: Abstraction has 339 states and 399 transitions. [2021-01-06 17:04:57,714 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2021-01-06 17:04:57,714 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 399 transitions. [2021-01-06 17:04:57,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-01-06 17:04:57,715 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:04:57,715 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:04:57,928 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-01-06 17:04:57,929 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:04:57,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:04:57,930 INFO L82 PathProgramCache]: Analyzing trace with hash -658324379, now seen corresponding path program 2 times [2021-01-06 17:04:57,930 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:04:57,931 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391759071] [2021-01-06 17:04:57,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:04:57,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:04:58,066 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:04:58,066 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391759071] [2021-01-06 17:04:58,066 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [350331035] [2021-01-06 17:04:58,066 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:04:58,116 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 17:04:58,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:04:58,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 7 conjunts are in the unsatisfiable core [2021-01-06 17:04:58,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:04:58,245 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2021-01-06 17:04:58,245 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:04:58,245 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 7] total 18 [2021-01-06 17:04:58,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45863192] [2021-01-06 17:04:58,248 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-06 17:04:58,248 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:04:58,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-06 17:04:58,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=212, Unknown=0, NotChecked=0, Total=342 [2021-01-06 17:04:58,249 INFO L87 Difference]: Start difference. First operand 339 states and 399 transitions. Second operand 19 states. [2021-01-06 17:04:58,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:04:58,821 INFO L93 Difference]: Finished difference Result 1075 states and 1251 transitions. [2021-01-06 17:04:58,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-01-06 17:04:58,822 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 43 [2021-01-06 17:04:58,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:04:58,826 INFO L225 Difference]: With dead ends: 1075 [2021-01-06 17:04:58,826 INFO L226 Difference]: Without dead ends: 821 [2021-01-06 17:04:58,828 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 349 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=486, Invalid=996, Unknown=0, NotChecked=0, Total=1482 [2021-01-06 17:04:58,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 821 states. [2021-01-06 17:04:58,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 821 to 333. [2021-01-06 17:04:58,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 333 states. [2021-01-06 17:04:58,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 388 transitions. [2021-01-06 17:04:58,863 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 388 transitions. Word has length 43 [2021-01-06 17:04:58,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:04:58,863 INFO L481 AbstractCegarLoop]: Abstraction has 333 states and 388 transitions. [2021-01-06 17:04:58,863 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-06 17:04:58,863 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 388 transitions. [2021-01-06 17:04:58,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-01-06 17:04:58,864 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:04:58,864 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:04:59,077 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:04:59,078 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:04:59,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:04:59,079 INFO L82 PathProgramCache]: Analyzing trace with hash 1311604647, now seen corresponding path program 3 times [2021-01-06 17:04:59,079 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:04:59,079 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957381716] [2021-01-06 17:04:59,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:04:59,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:04:59,248 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:04:59,249 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957381716] [2021-01-06 17:04:59,249 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [921026776] [2021-01-06 17:04:59,249 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:04:59,297 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-01-06 17:04:59,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:04:59,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-06 17:04:59,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:04:59,455 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 17:04:59,484 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-01-06 17:04:59,485 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:04:59,485 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [14] total 21 [2021-01-06 17:04:59,485 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887933074] [2021-01-06 17:04:59,486 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-06 17:04:59,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:04:59,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-06 17:04:59,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=310, Unknown=0, NotChecked=0, Total=420 [2021-01-06 17:04:59,487 INFO L87 Difference]: Start difference. First operand 333 states and 388 transitions. Second operand 8 states. [2021-01-06 17:04:59,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:04:59,653 INFO L93 Difference]: Finished difference Result 442 states and 513 transitions. [2021-01-06 17:04:59,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 17:04:59,654 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 46 [2021-01-06 17:04:59,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:04:59,656 INFO L225 Difference]: With dead ends: 442 [2021-01-06 17:04:59,656 INFO L226 Difference]: Without dead ends: 440 [2021-01-06 17:04:59,657 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=119, Invalid=387, Unknown=0, NotChecked=0, Total=506 [2021-01-06 17:04:59,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 440 states. [2021-01-06 17:04:59,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 440 to 333. [2021-01-06 17:04:59,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 333 states. [2021-01-06 17:04:59,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 388 transitions. [2021-01-06 17:04:59,688 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 388 transitions. Word has length 46 [2021-01-06 17:04:59,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:04:59,688 INFO L481 AbstractCegarLoop]: Abstraction has 333 states and 388 transitions. [2021-01-06 17:04:59,688 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-01-06 17:04:59,688 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 388 transitions. [2021-01-06 17:04:59,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-01-06 17:04:59,689 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:04:59,689 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:04:59,903 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:04:59,903 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:04:59,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:04:59,904 INFO L82 PathProgramCache]: Analyzing trace with hash -53609623, now seen corresponding path program 1 times [2021-01-06 17:04:59,904 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:04:59,905 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557056521] [2021-01-06 17:04:59,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:04:59,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:04:59,955 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2021-01-06 17:04:59,955 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557056521] [2021-01-06 17:04:59,955 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 17:04:59,955 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-01-06 17:04:59,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005367870] [2021-01-06 17:04:59,956 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 17:04:59,956 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:04:59,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 17:04:59,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-01-06 17:04:59,957 INFO L87 Difference]: Start difference. First operand 333 states and 388 transitions. Second operand 5 states. [2021-01-06 17:05:00,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:05:00,040 INFO L93 Difference]: Finished difference Result 561 states and 655 transitions. [2021-01-06 17:05:00,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 17:05:00,041 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 46 [2021-01-06 17:05:00,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:05:00,044 INFO L225 Difference]: With dead ends: 561 [2021-01-06 17:05:00,044 INFO L226 Difference]: Without dead ends: 448 [2021-01-06 17:05:00,045 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-01-06 17:05:00,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 448 states. [2021-01-06 17:05:00,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 448 to 400. [2021-01-06 17:05:00,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 400 states. [2021-01-06 17:05:00,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 469 transitions. [2021-01-06 17:05:00,087 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 469 transitions. Word has length 46 [2021-01-06 17:05:00,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:05:00,087 INFO L481 AbstractCegarLoop]: Abstraction has 400 states and 469 transitions. [2021-01-06 17:05:00,087 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 17:05:00,088 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 469 transitions. [2021-01-06 17:05:00,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-01-06 17:05:00,089 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:05:00,089 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 20, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:05:00,089 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-01-06 17:05:00,090 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:05:00,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:05:00,090 INFO L82 PathProgramCache]: Analyzing trace with hash 1284068705, now seen corresponding path program 1 times [2021-01-06 17:05:00,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:05:00,090 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771842812] [2021-01-06 17:05:00,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:05:00,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:05:00,289 INFO L134 CoverageAnalysis]: Checked inductivity of 745 backedges. 387 proven. 176 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2021-01-06 17:05:00,289 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771842812] [2021-01-06 17:05:00,289 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [71980622] [2021-01-06 17:05:00,289 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 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 17:05:00,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:05:00,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-06 17:05:00,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:05:00,662 INFO L134 CoverageAnalysis]: Checked inductivity of 745 backedges. 387 proven. 176 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2021-01-06 17:05:00,662 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:05:00,663 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-01-06 17:05:00,663 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746951427] [2021-01-06 17:05:00,663 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-01-06 17:05:00,663 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:05:00,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-01-06 17:05:00,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=285, Invalid=417, Unknown=0, NotChecked=0, Total=702 [2021-01-06 17:05:00,665 INFO L87 Difference]: Start difference. First operand 400 states and 469 transitions. Second operand 27 states. [2021-01-06 17:05:01,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:05:01,003 INFO L93 Difference]: Finished difference Result 1102 states and 1266 transitions. [2021-01-06 17:05:01,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-01-06 17:05:01,004 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 87 [2021-01-06 17:05:01,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:05:01,008 INFO L225 Difference]: With dead ends: 1102 [2021-01-06 17:05:01,009 INFO L226 Difference]: Without dead ends: 793 [2021-01-06 17:05:01,010 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=285, Invalid=417, Unknown=0, NotChecked=0, Total=702 [2021-01-06 17:05:01,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 793 states. [2021-01-06 17:05:01,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 793 to 439. [2021-01-06 17:05:01,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 439 states. [2021-01-06 17:05:01,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 439 states to 439 states and 514 transitions. [2021-01-06 17:05:01,085 INFO L78 Accepts]: Start accepts. Automaton has 439 states and 514 transitions. Word has length 87 [2021-01-06 17:05:01,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:05:01,085 INFO L481 AbstractCegarLoop]: Abstraction has 439 states and 514 transitions. [2021-01-06 17:05:01,085 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2021-01-06 17:05:01,085 INFO L276 IsEmpty]: Start isEmpty. Operand 439 states and 514 transitions. [2021-01-06 17:05:01,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-01-06 17:05:01,087 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:05:01,087 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 22, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:05:01,301 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-01-06 17:05:01,301 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:05:01,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:05:01,302 INFO L82 PathProgramCache]: Analyzing trace with hash -1856213775, now seen corresponding path program 2 times [2021-01-06 17:05:01,302 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:05:01,302 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214601242] [2021-01-06 17:05:01,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:05:01,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:05:01,487 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 458 proven. 210 refuted. 0 times theorem prover too weak. 216 trivial. 0 not checked. [2021-01-06 17:05:01,487 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214601242] [2021-01-06 17:05:01,488 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1352442754] [2021-01-06 17:05:01,488 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 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 17:05:01,558 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 17:05:01,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:05:01,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-06 17:05:01,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:05:01,854 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 458 proven. 210 refuted. 0 times theorem prover too weak. 216 trivial. 0 not checked. [2021-01-06 17:05:01,855 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:05:01,855 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2021-01-06 17:05:01,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095109316] [2021-01-06 17:05:01,856 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-01-06 17:05:01,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:05:01,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-01-06 17:05:01,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=328, Invalid=484, Unknown=0, NotChecked=0, Total=812 [2021-01-06 17:05:01,857 INFO L87 Difference]: Start difference. First operand 439 states and 514 transitions. Second operand 29 states. [2021-01-06 17:05:02,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:05:02,228 INFO L93 Difference]: Finished difference Result 1171 states and 1346 transitions. [2021-01-06 17:05:02,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-01-06 17:05:02,229 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 93 [2021-01-06 17:05:02,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:05:02,233 INFO L225 Difference]: With dead ends: 1171 [2021-01-06 17:05:02,233 INFO L226 Difference]: Without dead ends: 832 [2021-01-06 17:05:02,234 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=328, Invalid=484, Unknown=0, NotChecked=0, Total=812 [2021-01-06 17:05:02,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 832 states. [2021-01-06 17:05:02,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 832 to 478. [2021-01-06 17:05:02,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 478 states. [2021-01-06 17:05:02,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 478 states to 478 states and 559 transitions. [2021-01-06 17:05:02,287 INFO L78 Accepts]: Start accepts. Automaton has 478 states and 559 transitions. Word has length 93 [2021-01-06 17:05:02,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:05:02,288 INFO L481 AbstractCegarLoop]: Abstraction has 478 states and 559 transitions. [2021-01-06 17:05:02,288 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2021-01-06 17:05:02,288 INFO L276 IsEmpty]: Start isEmpty. Operand 478 states and 559 transitions. [2021-01-06 17:05:02,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-01-06 17:05:02,290 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:05:02,290 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 24, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:05:02,509 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:05:02,509 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:05:02,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:05:02,510 INFO L82 PathProgramCache]: Analyzing trace with hash -267019423, now seen corresponding path program 3 times [2021-01-06 17:05:02,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:05:02,511 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870829784] [2021-01-06 17:05:02,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:05:02,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:05:02,738 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 535 proven. 247 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2021-01-06 17:05:02,738 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870829784] [2021-01-06 17:05:02,739 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1512273774] [2021-01-06 17:05:02,739 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 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 17:05:02,796 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-01-06 17:05:02,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:05:02,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 28 conjunts are in the unsatisfiable core [2021-01-06 17:05:02,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:05:03,063 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 17:05:03,104 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 37 proven. 541 refuted. 0 times theorem prover too weak. 457 trivial. 0 not checked. [2021-01-06 17:05:03,105 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:05:03,105 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 10] total 25 [2021-01-06 17:05:03,105 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882129292] [2021-01-06 17:05:03,106 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-01-06 17:05:03,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:05:03,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-01-06 17:05:03,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=456, Unknown=0, NotChecked=0, Total=600 [2021-01-06 17:05:03,107 INFO L87 Difference]: Start difference. First operand 478 states and 559 transitions. Second operand 25 states. [2021-01-06 17:05:06,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:05:06,222 INFO L93 Difference]: Finished difference Result 2208 states and 2540 transitions. [2021-01-06 17:05:06,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-01-06 17:05:06,222 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 99 [2021-01-06 17:05:06,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:05:06,230 INFO L225 Difference]: With dead ends: 2208 [2021-01-06 17:05:06,231 INFO L226 Difference]: Without dead ends: 1839 [2021-01-06 17:05:06,235 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2259 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1728, Invalid=6282, Unknown=0, NotChecked=0, Total=8010 [2021-01-06 17:05:06,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1839 states. [2021-01-06 17:05:06,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1839 to 770. [2021-01-06 17:05:06,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 770 states. [2021-01-06 17:05:06,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 770 states to 770 states and 901 transitions. [2021-01-06 17:05:06,345 INFO L78 Accepts]: Start accepts. Automaton has 770 states and 901 transitions. Word has length 99 [2021-01-06 17:05:06,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:05:06,346 INFO L481 AbstractCegarLoop]: Abstraction has 770 states and 901 transitions. [2021-01-06 17:05:06,346 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2021-01-06 17:05:06,346 INFO L276 IsEmpty]: Start isEmpty. Operand 770 states and 901 transitions. [2021-01-06 17:05:06,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-01-06 17:05:06,348 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:05:06,348 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 24, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:05:06,562 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-01-06 17:05:06,563 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:05:06,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:05:06,564 INFO L82 PathProgramCache]: Analyzing trace with hash -111346257, now seen corresponding path program 1 times [2021-01-06 17:05:06,564 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:05:06,564 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637723712] [2021-01-06 17:05:06,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:05:06,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:05:06,797 INFO L134 CoverageAnalysis]: Checked inductivity of 1198 backedges. 49 proven. 861 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2021-01-06 17:05:06,798 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637723712] [2021-01-06 17:05:06,798 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [727277213] [2021-01-06 17:05:06,798 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 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 [2021-01-06 17:05:06,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:05:06,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 17 conjunts are in the unsatisfiable core [2021-01-06 17:05:06,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:05:07,259 INFO L134 CoverageAnalysis]: Checked inductivity of 1198 backedges. 618 proven. 287 refuted. 0 times theorem prover too weak. 293 trivial. 0 not checked. [2021-01-06 17:05:07,259 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:05:07,259 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2021-01-06 17:05:07,259 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104261240] [2021-01-06 17:05:07,260 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-01-06 17:05:07,260 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:05:07,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-01-06 17:05:07,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=423, Invalid=633, Unknown=0, NotChecked=0, Total=1056 [2021-01-06 17:05:07,261 INFO L87 Difference]: Start difference. First operand 770 states and 901 transitions. Second operand 33 states. [2021-01-06 17:05:07,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:05:07,788 INFO L93 Difference]: Finished difference Result 1968 states and 2264 transitions. [2021-01-06 17:05:07,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-01-06 17:05:07,789 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 105 [2021-01-06 17:05:07,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:05:07,795 INFO L225 Difference]: With dead ends: 1968 [2021-01-06 17:05:07,795 INFO L226 Difference]: Without dead ends: 1316 [2021-01-06 17:05:07,797 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 417 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=423, Invalid=633, Unknown=0, NotChecked=0, Total=1056 [2021-01-06 17:05:07,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1316 states. [2021-01-06 17:05:07,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1316 to 809. [2021-01-06 17:05:07,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 809 states. [2021-01-06 17:05:07,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 809 states to 809 states and 946 transitions. [2021-01-06 17:05:07,924 INFO L78 Accepts]: Start accepts. Automaton has 809 states and 946 transitions. Word has length 105 [2021-01-06 17:05:07,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:05:07,924 INFO L481 AbstractCegarLoop]: Abstraction has 809 states and 946 transitions. [2021-01-06 17:05:07,924 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2021-01-06 17:05:07,924 INFO L276 IsEmpty]: Start isEmpty. Operand 809 states and 946 transitions. [2021-01-06 17:05:07,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-01-06 17:05:07,926 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:05:07,927 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 26, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:05:08,142 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-01-06 17:05:08,142 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:05:08,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:05:08,143 INFO L82 PathProgramCache]: Analyzing trace with hash 802849635, now seen corresponding path program 2 times [2021-01-06 17:05:08,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:05:08,143 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961708201] [2021-01-06 17:05:08,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:05:08,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:05:08,418 INFO L134 CoverageAnalysis]: Checked inductivity of 1373 backedges. 52 proven. 990 refuted. 0 times theorem prover too weak. 331 trivial. 0 not checked. [2021-01-06 17:05:08,418 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961708201] [2021-01-06 17:05:08,418 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1980789377] [2021-01-06 17:05:08,418 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:05:08,493 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 17:05:08,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:05:08,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 18 conjunts are in the unsatisfiable core [2021-01-06 17:05:08,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:05:08,891 INFO L134 CoverageAnalysis]: Checked inductivity of 1373 backedges. 707 proven. 330 refuted. 0 times theorem prover too weak. 336 trivial. 0 not checked. [2021-01-06 17:05:08,892 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:05:08,892 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-01-06 17:05:08,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038081569] [2021-01-06 17:05:08,892 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-01-06 17:05:08,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:05:08,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-01-06 17:05:08,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=475, Invalid=715, Unknown=0, NotChecked=0, Total=1190 [2021-01-06 17:05:08,894 INFO L87 Difference]: Start difference. First operand 809 states and 946 transitions. Second operand 35 states. [2021-01-06 17:05:09,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:05:09,577 INFO L93 Difference]: Finished difference Result 2078 states and 2393 transitions. [2021-01-06 17:05:09,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-01-06 17:05:09,578 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 111 [2021-01-06 17:05:09,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:05:09,582 INFO L225 Difference]: With dead ends: 2078 [2021-01-06 17:05:09,582 INFO L226 Difference]: Without dead ends: 1396 [2021-01-06 17:05:09,584 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 477 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=475, Invalid=715, Unknown=0, NotChecked=0, Total=1190 [2021-01-06 17:05:09,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1396 states. [2021-01-06 17:05:09,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1396 to 866. [2021-01-06 17:05:09,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 866 states. [2021-01-06 17:05:09,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 866 states to 866 states and 1012 transitions. [2021-01-06 17:05:09,711 INFO L78 Accepts]: Start accepts. Automaton has 866 states and 1012 transitions. Word has length 111 [2021-01-06 17:05:09,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:05:09,711 INFO L481 AbstractCegarLoop]: Abstraction has 866 states and 1012 transitions. [2021-01-06 17:05:09,711 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2021-01-06 17:05:09,711 INFO L276 IsEmpty]: Start isEmpty. Operand 866 states and 1012 transitions. [2021-01-06 17:05:09,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-01-06 17:05:09,713 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:05:09,713 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 28, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:05:09,926 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-01-06 17:05:09,927 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:05:09,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:05:09,928 INFO L82 PathProgramCache]: Analyzing trace with hash -780287697, now seen corresponding path program 3 times [2021-01-06 17:05:09,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:05:09,928 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789360671] [2021-01-06 17:05:09,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:05:09,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:05:10,288 INFO L134 CoverageAnalysis]: Checked inductivity of 1560 backedges. 55 proven. 1128 refuted. 0 times theorem prover too weak. 377 trivial. 0 not checked. [2021-01-06 17:05:10,296 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789360671] [2021-01-06 17:05:10,296 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [636107328] [2021-01-06 17:05:10,296 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:05:10,381 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-01-06 17:05:10,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:05:10,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-06 17:05:10,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:05:10,612 INFO L134 CoverageAnalysis]: Checked inductivity of 1560 backedges. 807 proven. 47 refuted. 0 times theorem prover too weak. 706 trivial. 0 not checked. [2021-01-06 17:05:10,612 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:05:10,612 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 7] total 25 [2021-01-06 17:05:10,612 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374899484] [2021-01-06 17:05:10,613 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-01-06 17:05:10,613 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:05:10,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-01-06 17:05:10,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=415, Unknown=0, NotChecked=0, Total=600 [2021-01-06 17:05:10,614 INFO L87 Difference]: Start difference. First operand 866 states and 1012 transitions. Second operand 25 states. [2021-01-06 17:05:13,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:05:13,074 INFO L93 Difference]: Finished difference Result 2428 states and 2841 transitions. [2021-01-06 17:05:13,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-01-06 17:05:13,075 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 117 [2021-01-06 17:05:13,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:05:13,080 INFO L225 Difference]: With dead ends: 2428 [2021-01-06 17:05:13,080 INFO L226 Difference]: Without dead ends: 1698 [2021-01-06 17:05:13,083 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1839 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1816, Invalid=4990, Unknown=0, NotChecked=0, Total=6806 [2021-01-06 17:05:13,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1698 states. [2021-01-06 17:05:13,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1698 to 1132. [2021-01-06 17:05:13,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1132 states. [2021-01-06 17:05:13,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1132 states to 1132 states and 1303 transitions. [2021-01-06 17:05:13,267 INFO L78 Accepts]: Start accepts. Automaton has 1132 states and 1303 transitions. Word has length 117 [2021-01-06 17:05:13,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:05:13,267 INFO L481 AbstractCegarLoop]: Abstraction has 1132 states and 1303 transitions. [2021-01-06 17:05:13,267 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2021-01-06 17:05:13,267 INFO L276 IsEmpty]: Start isEmpty. Operand 1132 states and 1303 transitions. [2021-01-06 17:05:13,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-01-06 17:05:13,269 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:05:13,270 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 20, 14, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:05:13,482 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-01-06 17:05:13,482 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:05:13,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:05:13,483 INFO L82 PathProgramCache]: Analyzing trace with hash 840591843, now seen corresponding path program 4 times [2021-01-06 17:05:13,483 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:05:13,483 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919070429] [2021-01-06 17:05:13,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:05:13,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:05:13,547 INFO L134 CoverageAnalysis]: Checked inductivity of 1759 backedges. 984 proven. 0 refuted. 0 times theorem prover too weak. 775 trivial. 0 not checked. [2021-01-06 17:05:13,547 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919070429] [2021-01-06 17:05:13,547 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 17:05:13,547 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-01-06 17:05:13,548 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107455148] [2021-01-06 17:05:13,548 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 17:05:13,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:05:13,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 17:05:13,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-01-06 17:05:13,549 INFO L87 Difference]: Start difference. First operand 1132 states and 1303 transitions. Second operand 5 states. [2021-01-06 17:05:13,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:05:13,787 INFO L93 Difference]: Finished difference Result 1815 states and 2023 transitions. [2021-01-06 17:05:13,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 17:05:13,788 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 123 [2021-01-06 17:05:13,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:05:13,796 INFO L225 Difference]: With dead ends: 1815 [2021-01-06 17:05:13,796 INFO L226 Difference]: Without dead ends: 1604 [2021-01-06 17:05:13,797 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 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 17:05:13,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1604 states. [2021-01-06 17:05:13,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1604 to 1150. [2021-01-06 17:05:13,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1150 states. [2021-01-06 17:05:13,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1150 states to 1150 states and 1327 transitions. [2021-01-06 17:05:13,976 INFO L78 Accepts]: Start accepts. Automaton has 1150 states and 1327 transitions. Word has length 123 [2021-01-06 17:05:13,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:05:13,977 INFO L481 AbstractCegarLoop]: Abstraction has 1150 states and 1327 transitions. [2021-01-06 17:05:13,977 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 17:05:13,977 INFO L276 IsEmpty]: Start isEmpty. Operand 1150 states and 1327 transitions. [2021-01-06 17:05:13,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-01-06 17:05:13,979 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:05:13,979 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 19, 15, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:05:13,979 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-01-06 17:05:13,979 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:05:13,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:05:13,980 INFO L82 PathProgramCache]: Analyzing trace with hash -1273355935, now seen corresponding path program 5 times [2021-01-06 17:05:13,980 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:05:13,980 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693982626] [2021-01-06 17:05:13,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:05:14,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:05:14,327 INFO L134 CoverageAnalysis]: Checked inductivity of 1759 backedges. 903 proven. 425 refuted. 0 times theorem prover too weak. 431 trivial. 0 not checked. [2021-01-06 17:05:14,328 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693982626] [2021-01-06 17:05:14,328 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [193263060] [2021-01-06 17:05:14,328 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:05:14,405 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2021-01-06 17:05:14,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:05:14,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 22 conjunts are in the unsatisfiable core [2021-01-06 17:05:14,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:05:15,135 INFO L134 CoverageAnalysis]: Checked inductivity of 1759 backedges. 1159 proven. 338 refuted. 0 times theorem prover too weak. 262 trivial. 0 not checked. [2021-01-06 17:05:15,136 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:05:15,136 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 23] total 42 [2021-01-06 17:05:15,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848841761] [2021-01-06 17:05:15,136 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-01-06 17:05:15,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:05:15,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-01-06 17:05:15,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=381, Invalid=1341, Unknown=0, NotChecked=0, Total=1722 [2021-01-06 17:05:15,137 INFO L87 Difference]: Start difference. First operand 1150 states and 1327 transitions. Second operand 42 states. [2021-01-06 17:05:17,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:05:17,579 INFO L93 Difference]: Finished difference Result 2896 states and 3293 transitions. [2021-01-06 17:05:17,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-01-06 17:05:17,580 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 123 [2021-01-06 17:05:17,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:05:17,587 INFO L225 Difference]: With dead ends: 2896 [2021-01-06 17:05:17,588 INFO L226 Difference]: Without dead ends: 1893 [2021-01-06 17:05:17,592 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2477 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=2087, Invalid=7033, Unknown=0, NotChecked=0, Total=9120 [2021-01-06 17:05:17,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1893 states. [2021-01-06 17:05:17,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1893 to 1123. [2021-01-06 17:05:17,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1123 states. [2021-01-06 17:05:17,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1123 states to 1123 states and 1285 transitions. [2021-01-06 17:05:17,730 INFO L78 Accepts]: Start accepts. Automaton has 1123 states and 1285 transitions. Word has length 123 [2021-01-06 17:05:17,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:05:17,730 INFO L481 AbstractCegarLoop]: Abstraction has 1123 states and 1285 transitions. [2021-01-06 17:05:17,730 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2021-01-06 17:05:17,730 INFO L276 IsEmpty]: Start isEmpty. Operand 1123 states and 1285 transitions. [2021-01-06 17:05:17,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-01-06 17:05:17,733 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:05:17,733 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 21, 15, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:05:17,947 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-01-06 17:05:17,948 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:05:17,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:05:17,949 INFO L82 PathProgramCache]: Analyzing trace with hash 1151168365, now seen corresponding path program 6 times [2021-01-06 17:05:17,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:05:17,949 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168311097] [2021-01-06 17:05:17,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:05:17,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:05:18,284 INFO L134 CoverageAnalysis]: Checked inductivity of 1970 backedges. 1010 proven. 477 refuted. 0 times theorem prover too weak. 483 trivial. 0 not checked. [2021-01-06 17:05:18,284 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168311097] [2021-01-06 17:05:18,284 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1431728132] [2021-01-06 17:05:18,284 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 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:05:18,331 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-01-06 17:05:18,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:05:18,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 24 conjunts are in the unsatisfiable core [2021-01-06 17:05:18,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:05:18,631 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 17:05:18,710 INFO L134 CoverageAnalysis]: Checked inductivity of 1970 backedges. 228 proven. 1027 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2021-01-06 17:05:18,711 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:05:18,711 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 9] total 29 [2021-01-06 17:05:18,711 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876052935] [2021-01-06 17:05:18,712 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-01-06 17:05:18,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:05:18,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-01-06 17:05:18,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=582, Unknown=0, NotChecked=0, Total=812 [2021-01-06 17:05:18,713 INFO L87 Difference]: Start difference. First operand 1123 states and 1285 transitions. Second operand 29 states. [2021-01-06 17:05:23,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:05:23,678 INFO L93 Difference]: Finished difference Result 2474 states and 2859 transitions. [2021-01-06 17:05:23,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2021-01-06 17:05:23,679 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 129 [2021-01-06 17:05:23,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:05:23,684 INFO L225 Difference]: With dead ends: 2474 [2021-01-06 17:05:23,684 INFO L226 Difference]: Without dead ends: 1496 [2021-01-06 17:05:23,690 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5530 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=3495, Invalid=13535, Unknown=0, NotChecked=0, Total=17030 [2021-01-06 17:05:23,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1496 states. [2021-01-06 17:05:23,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1496 to 1254. [2021-01-06 17:05:23,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1254 states. [2021-01-06 17:05:23,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1254 states to 1254 states and 1444 transitions. [2021-01-06 17:05:23,847 INFO L78 Accepts]: Start accepts. Automaton has 1254 states and 1444 transitions. Word has length 129 [2021-01-06 17:05:23,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:05:23,847 INFO L481 AbstractCegarLoop]: Abstraction has 1254 states and 1444 transitions. [2021-01-06 17:05:23,848 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2021-01-06 17:05:23,848 INFO L276 IsEmpty]: Start isEmpty. Operand 1254 states and 1444 transitions. [2021-01-06 17:05:23,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2021-01-06 17:05:23,850 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:05:23,850 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 37, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:05:24,063 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:05:24,064 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:05:24,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:05:24,064 INFO L82 PathProgramCache]: Analyzing trace with hash -2144366173, now seen corresponding path program 1 times [2021-01-06 17:05:24,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:05:24,065 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613660810] [2021-01-06 17:05:24,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:05:24,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:05:24,503 INFO L134 CoverageAnalysis]: Checked inductivity of 2309 backedges. 1182 proven. 590 refuted. 0 times theorem prover too weak. 537 trivial. 0 not checked. [2021-01-06 17:05:24,503 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613660810] [2021-01-06 17:05:24,504 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [594434664] [2021-01-06 17:05:24,504 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:05:24,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:05:24,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 23 conjunts are in the unsatisfiable core [2021-01-06 17:05:24,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:05:25,288 INFO L134 CoverageAnalysis]: Checked inductivity of 2309 backedges. 1181 proven. 590 refuted. 0 times theorem prover too weak. 538 trivial. 0 not checked. [2021-01-06 17:05:25,288 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:05:25,288 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23] total 45 [2021-01-06 17:05:25,289 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766687630] [2021-01-06 17:05:25,289 INFO L461 AbstractCegarLoop]: Interpolant automaton has 46 states [2021-01-06 17:05:25,289 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:05:25,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-01-06 17:05:25,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=1329, Unknown=0, NotChecked=0, Total=2070 [2021-01-06 17:05:25,291 INFO L87 Difference]: Start difference. First operand 1254 states and 1444 transitions. Second operand 46 states. [2021-01-06 17:05:26,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:05:26,623 INFO L93 Difference]: Finished difference Result 2876 states and 3425 transitions. [2021-01-06 17:05:26,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-01-06 17:05:26,624 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 138 [2021-01-06 17:05:26,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:05:26,630 INFO L225 Difference]: With dead ends: 2876 [2021-01-06 17:05:26,630 INFO L226 Difference]: Without dead ends: 1781 [2021-01-06 17:05:26,631 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1529 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1654, Invalid=3748, Unknown=0, NotChecked=0, Total=5402 [2021-01-06 17:05:26,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1781 states. [2021-01-06 17:05:26,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1781 to 1496. [2021-01-06 17:05:26,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1496 states. [2021-01-06 17:05:26,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1496 states to 1496 states and 1766 transitions. [2021-01-06 17:05:26,785 INFO L78 Accepts]: Start accepts. Automaton has 1496 states and 1766 transitions. Word has length 138 [2021-01-06 17:05:26,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:05:26,786 INFO L481 AbstractCegarLoop]: Abstraction has 1496 states and 1766 transitions. [2021-01-06 17:05:26,786 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2021-01-06 17:05:26,786 INFO L276 IsEmpty]: Start isEmpty. Operand 1496 states and 1766 transitions. [2021-01-06 17:05:26,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-01-06 17:05:26,788 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:05:26,788 INFO L422 BasicCegarLoop]: trace histogram [42, 42, 40, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:05:27,002 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-01-06 17:05:27,003 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:05:27,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:05:27,004 INFO L82 PathProgramCache]: Analyzing trace with hash 297433953, now seen corresponding path program 2 times [2021-01-06 17:05:27,004 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:05:27,004 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724202144] [2021-01-06 17:05:27,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:05:27,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:05:27,478 INFO L134 CoverageAnalysis]: Checked inductivity of 2675 backedges. 1368 proven. 651 refuted. 0 times theorem prover too weak. 656 trivial. 0 not checked. [2021-01-06 17:05:27,478 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724202144] [2021-01-06 17:05:27,478 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1343294223] [2021-01-06 17:05:27,478 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 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:05:27,553 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 17:05:27,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:05:27,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 25 conjunts are in the unsatisfiable core [2021-01-06 17:05:27,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:05:28,381 INFO L134 CoverageAnalysis]: Checked inductivity of 2675 backedges. 6 proven. 1975 refuted. 0 times theorem prover too weak. 694 trivial. 0 not checked. [2021-01-06 17:05:28,381 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:05:28,381 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 48 [2021-01-06 17:05:28,382 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051761170] [2021-01-06 17:05:28,382 INFO L461 AbstractCegarLoop]: Interpolant automaton has 49 states [2021-01-06 17:05:28,382 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:05:28,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-01-06 17:05:28,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=791, Invalid=1561, Unknown=0, NotChecked=0, Total=2352 [2021-01-06 17:05:28,384 INFO L87 Difference]: Start difference. First operand 1496 states and 1766 transitions. Second operand 49 states. [2021-01-06 17:05:29,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:05:29,472 INFO L93 Difference]: Finished difference Result 2748 states and 3281 transitions. [2021-01-06 17:05:29,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-01-06 17:05:29,473 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 147 [2021-01-06 17:05:29,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:05:29,479 INFO L225 Difference]: With dead ends: 2748 [2021-01-06 17:05:29,480 INFO L226 Difference]: Without dead ends: 1869 [2021-01-06 17:05:29,481 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1486 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1575, Invalid=3395, Unknown=0, NotChecked=0, Total=4970 [2021-01-06 17:05:29,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1869 states. [2021-01-06 17:05:29,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1869 to 1506. [2021-01-06 17:05:29,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1506 states. [2021-01-06 17:05:29,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1506 states to 1506 states and 1783 transitions. [2021-01-06 17:05:29,650 INFO L78 Accepts]: Start accepts. Automaton has 1506 states and 1783 transitions. Word has length 147 [2021-01-06 17:05:29,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:05:29,651 INFO L481 AbstractCegarLoop]: Abstraction has 1506 states and 1783 transitions. [2021-01-06 17:05:29,651 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2021-01-06 17:05:29,651 INFO L276 IsEmpty]: Start isEmpty. Operand 1506 states and 1783 transitions. [2021-01-06 17:05:29,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-01-06 17:05:29,653 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:05:29,653 INFO L422 BasicCegarLoop]: trace histogram [42, 42, 42, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:05:29,868 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:05:29,869 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:05:29,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:05:29,869 INFO L82 PathProgramCache]: Analyzing trace with hash -758927133, now seen corresponding path program 1 times [2021-01-06 17:05:29,870 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:05:29,870 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219597200] [2021-01-06 17:05:29,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:05:29,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:05:29,987 INFO L134 CoverageAnalysis]: Checked inductivity of 2675 backedges. 2 proven. 1371 refuted. 0 times theorem prover too weak. 1302 trivial. 0 not checked. [2021-01-06 17:05:29,988 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219597200] [2021-01-06 17:05:29,988 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [661413268] [2021-01-06 17:05:29,988 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 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:05:30,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:05:30,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 24 conjunts are in the unsatisfiable core [2021-01-06 17:05:30,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:05:30,754 INFO L134 CoverageAnalysis]: Checked inductivity of 2675 backedges. 1367 proven. 651 refuted. 0 times theorem prover too weak. 657 trivial. 0 not checked. [2021-01-06 17:05:30,754 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:05:30,754 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 24] total 27 [2021-01-06 17:05:30,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978674977] [2021-01-06 17:05:30,755 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-01-06 17:05:30,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:05:30,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-01-06 17:05:30,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=310, Invalid=446, Unknown=0, NotChecked=0, Total=756 [2021-01-06 17:05:30,756 INFO L87 Difference]: Start difference. First operand 1506 states and 1783 transitions. Second operand 28 states. [2021-01-06 17:05:33,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:05:33,663 INFO L93 Difference]: Finished difference Result 3583 states and 4220 transitions. [2021-01-06 17:05:33,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2021-01-06 17:05:33,664 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 147 [2021-01-06 17:05:33,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:05:33,671 INFO L225 Difference]: With dead ends: 3583 [2021-01-06 17:05:33,671 INFO L226 Difference]: Without dead ends: 2342 [2021-01-06 17:05:33,673 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2346 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=2973, Invalid=6147, Unknown=0, NotChecked=0, Total=9120 [2021-01-06 17:05:33,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2342 states. [2021-01-06 17:05:33,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2342 to 1721. [2021-01-06 17:05:33,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1721 states. [2021-01-06 17:05:33,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1721 states to 1721 states and 2031 transitions. [2021-01-06 17:05:33,840 INFO L78 Accepts]: Start accepts. Automaton has 1721 states and 2031 transitions. Word has length 147 [2021-01-06 17:05:33,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:05:33,841 INFO L481 AbstractCegarLoop]: Abstraction has 1721 states and 2031 transitions. [2021-01-06 17:05:33,841 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2021-01-06 17:05:33,841 INFO L276 IsEmpty]: Start isEmpty. Operand 1721 states and 2031 transitions. [2021-01-06 17:05:33,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2021-01-06 17:05:33,843 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:05:33,843 INFO L422 BasicCegarLoop]: trace histogram [44, 44, 42, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:05:34,054 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-01-06 17:05:34,055 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:05:34,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:05:34,056 INFO L82 PathProgramCache]: Analyzing trace with hash -1034830995, now seen corresponding path program 3 times [2021-01-06 17:05:34,056 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:05:34,057 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826422098] [2021-01-06 17:05:34,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:05:34,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:05:34,559 INFO L134 CoverageAnalysis]: Checked inductivity of 2934 backedges. 1499 proven. 715 refuted. 0 times theorem prover too weak. 720 trivial. 0 not checked. [2021-01-06 17:05:34,559 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826422098] [2021-01-06 17:05:34,559 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1074179662] [2021-01-06 17:05:34,560 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:05:34,607 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-01-06 17:05:34,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:05:34,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 26 conjunts are in the unsatisfiable core [2021-01-06 17:05:34,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:05:35,156 INFO L134 CoverageAnalysis]: Checked inductivity of 2934 backedges. 0 proven. 1504 refuted. 0 times theorem prover too weak. 1430 trivial. 0 not checked. [2021-01-06 17:05:35,156 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:05:35,156 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 8] total 33 [2021-01-06 17:05:35,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164406733] [2021-01-06 17:05:35,157 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-01-06 17:05:35,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:05:35,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-01-06 17:05:35,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=308, Invalid=814, Unknown=0, NotChecked=0, Total=1122 [2021-01-06 17:05:35,158 INFO L87 Difference]: Start difference. First operand 1721 states and 2031 transitions. Second operand 34 states. [2021-01-06 17:05:43,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:05:43,224 INFO L93 Difference]: Finished difference Result 3439 states and 4088 transitions. [2021-01-06 17:05:43,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 148 states. [2021-01-06 17:05:43,224 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 153 [2021-01-06 17:05:43,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:05:43,231 INFO L225 Difference]: With dead ends: 3439 [2021-01-06 17:05:43,231 INFO L226 Difference]: Without dead ends: 2356 [2021-01-06 17:05:43,235 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10497 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=6053, Invalid=25099, Unknown=0, NotChecked=0, Total=31152 [2021-01-06 17:05:43,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2356 states. [2021-01-06 17:05:43,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2356 to 1810. [2021-01-06 17:05:43,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1810 states. [2021-01-06 17:05:43,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1810 states to 1810 states and 2130 transitions. [2021-01-06 17:05:43,382 INFO L78 Accepts]: Start accepts. Automaton has 1810 states and 2130 transitions. Word has length 153 [2021-01-06 17:05:43,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:05:43,382 INFO L481 AbstractCegarLoop]: Abstraction has 1810 states and 2130 transitions. [2021-01-06 17:05:43,382 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2021-01-06 17:05:43,382 INFO L276 IsEmpty]: Start isEmpty. Operand 1810 states and 2130 transitions. [2021-01-06 17:05:43,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-01-06 17:05:43,384 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:05:43,384 INFO L422 BasicCegarLoop]: trace histogram [45, 45, 44, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:05:43,592 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-01-06 17:05:43,593 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:05:43,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:05:43,593 INFO L82 PathProgramCache]: Analyzing trace with hash 882596709, now seen corresponding path program 1 times [2021-01-06 17:05:43,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:05:43,594 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703361653] [2021-01-06 17:05:43,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:05:43,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:05:44,131 INFO L134 CoverageAnalysis]: Checked inductivity of 3068 backedges. 1565 proven. 715 refuted. 0 times theorem prover too weak. 788 trivial. 0 not checked. [2021-01-06 17:05:44,131 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703361653] [2021-01-06 17:05:44,131 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1730402560] [2021-01-06 17:05:44,131 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:05:44,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:05:44,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 25 conjunts are in the unsatisfiable core [2021-01-06 17:05:44,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:05:44,947 INFO L134 CoverageAnalysis]: Checked inductivity of 3068 backedges. 1565 proven. 715 refuted. 0 times theorem prover too weak. 788 trivial. 0 not checked. [2021-01-06 17:05:44,947 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:05:44,947 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 48 [2021-01-06 17:05:44,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989325433] [2021-01-06 17:05:44,948 INFO L461 AbstractCegarLoop]: Interpolant automaton has 49 states [2021-01-06 17:05:44,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:05:44,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-01-06 17:05:44,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=923, Invalid=1429, Unknown=0, NotChecked=0, Total=2352 [2021-01-06 17:05:44,949 INFO L87 Difference]: Start difference. First operand 1810 states and 2130 transitions. Second operand 49 states. [2021-01-06 17:05:45,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:05:45,446 INFO L93 Difference]: Finished difference Result 3392 states and 4017 transitions. [2021-01-06 17:05:45,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-01-06 17:05:45,446 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 156 [2021-01-06 17:05:45,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:05:45,454 INFO L225 Difference]: With dead ends: 3392 [2021-01-06 17:05:45,454 INFO L226 Difference]: Without dead ends: 1936 [2021-01-06 17:05:45,456 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1009 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=923, Invalid=1429, Unknown=0, NotChecked=0, Total=2352 [2021-01-06 17:05:45,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1936 states. [2021-01-06 17:05:45,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1936 to 1869. [2021-01-06 17:05:45,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1869 states. [2021-01-06 17:05:45,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1869 states to 1869 states and 2192 transitions. [2021-01-06 17:05:45,600 INFO L78 Accepts]: Start accepts. Automaton has 1869 states and 2192 transitions. Word has length 156 [2021-01-06 17:05:45,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:05:45,601 INFO L481 AbstractCegarLoop]: Abstraction has 1869 states and 2192 transitions. [2021-01-06 17:05:45,601 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2021-01-06 17:05:45,601 INFO L276 IsEmpty]: Start isEmpty. Operand 1869 states and 2192 transitions. [2021-01-06 17:05:45,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2021-01-06 17:05:45,603 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:05:45,603 INFO L422 BasicCegarLoop]: trace histogram [46, 46, 45, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:05:45,809 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-01-06 17:05:45,809 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:05:45,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:05:45,810 INFO L82 PathProgramCache]: Analyzing trace with hash -1319566561, now seen corresponding path program 2 times [2021-01-06 17:05:45,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:05:45,811 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374669985] [2021-01-06 17:05:45,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:05:45,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:05:46,383 INFO L134 CoverageAnalysis]: Checked inductivity of 3205 backedges. 1636 proven. 782 refuted. 0 times theorem prover too weak. 787 trivial. 0 not checked. [2021-01-06 17:05:46,383 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374669985] [2021-01-06 17:05:46,383 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1054460139] [2021-01-06 17:05:46,383 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 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:05:46,464 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 17:05:46,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:05:46,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 26 conjunts are in the unsatisfiable core [2021-01-06 17:05:46,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:05:47,300 INFO L134 CoverageAnalysis]: Checked inductivity of 3205 backedges. 1635 proven. 782 refuted. 0 times theorem prover too weak. 788 trivial. 0 not checked. [2021-01-06 17:05:47,300 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:05:47,300 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26] total 51 [2021-01-06 17:05:47,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216817420] [2021-01-06 17:05:47,301 INFO L461 AbstractCegarLoop]: Interpolant automaton has 52 states [2021-01-06 17:05:47,301 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:05:47,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-01-06 17:05:47,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=954, Invalid=1698, Unknown=0, NotChecked=0, Total=2652 [2021-01-06 17:05:47,302 INFO L87 Difference]: Start difference. First operand 1869 states and 2192 transitions. Second operand 52 states. [2021-01-06 17:05:48,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:05:48,950 INFO L93 Difference]: Finished difference Result 4186 states and 5017 transitions. [2021-01-06 17:05:48,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-01-06 17:05:48,950 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 159 [2021-01-06 17:05:48,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:05:48,960 INFO L225 Difference]: With dead ends: 4186 [2021-01-06 17:05:48,960 INFO L226 Difference]: Without dead ends: 2509 [2021-01-06 17:05:48,963 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1964 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2098, Invalid=4708, Unknown=0, NotChecked=0, Total=6806 [2021-01-06 17:05:48,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2509 states. [2021-01-06 17:05:49,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2509 to 1941. [2021-01-06 17:05:49,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1941 states. [2021-01-06 17:05:49,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1941 states to 1941 states and 2275 transitions. [2021-01-06 17:05:49,160 INFO L78 Accepts]: Start accepts. Automaton has 1941 states and 2275 transitions. Word has length 159 [2021-01-06 17:05:49,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:05:49,160 INFO L481 AbstractCegarLoop]: Abstraction has 1941 states and 2275 transitions. [2021-01-06 17:05:49,160 INFO L482 AbstractCegarLoop]: Interpolant automaton has 52 states. [2021-01-06 17:05:49,160 INFO L276 IsEmpty]: Start isEmpty. Operand 1941 states and 2275 transitions. [2021-01-06 17:05:49,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-01-06 17:05:49,162 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:05:49,162 INFO L422 BasicCegarLoop]: trace histogram [48, 48, 47, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:05:49,362 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-01-06 17:05:49,363 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:05:49,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:05:49,363 INFO L82 PathProgramCache]: Analyzing trace with hash 1553693227, now seen corresponding path program 3 times [2021-01-06 17:05:49,364 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:05:49,364 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115112896] [2021-01-06 17:05:49,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:05:49,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:05:49,973 INFO L134 CoverageAnalysis]: Checked inductivity of 3488 backedges. 1779 proven. 852 refuted. 0 times theorem prover too weak. 857 trivial. 0 not checked. [2021-01-06 17:05:49,973 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115112896] [2021-01-06 17:05:49,973 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1636803395] [2021-01-06 17:05:49,973 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 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:05:50,033 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-01-06 17:05:50,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:05:50,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 4 conjunts are in the unsatisfiable core [2021-01-06 17:05:50,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:05:50,251 INFO L134 CoverageAnalysis]: Checked inductivity of 3488 backedges. 102 proven. 0 refuted. 0 times theorem prover too weak. 3386 trivial. 0 not checked. [2021-01-06 17:05:50,251 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:05:50,251 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [28] total 32 [2021-01-06 17:05:50,251 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130647574] [2021-01-06 17:05:50,252 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 17:05:50,252 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:05:50,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 17:05:50,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=339, Invalid=653, Unknown=0, NotChecked=0, Total=992 [2021-01-06 17:05:50,253 INFO L87 Difference]: Start difference. First operand 1941 states and 2275 transitions. Second operand 5 states. [2021-01-06 17:05:50,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:05:50,495 INFO L93 Difference]: Finished difference Result 2712 states and 3137 transitions. [2021-01-06 17:05:50,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-01-06 17:05:50,496 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 165 [2021-01-06 17:05:50,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:05:50,505 INFO L225 Difference]: With dead ends: 2712 [2021-01-06 17:05:50,505 INFO L226 Difference]: Without dead ends: 1328 [2021-01-06 17:05:50,507 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=349, Invalid=773, Unknown=0, NotChecked=0, Total=1122 [2021-01-06 17:05:50,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1328 states. [2021-01-06 17:05:50,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1328 to 1178. [2021-01-06 17:05:50,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1178 states. [2021-01-06 17:05:50,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1178 states to 1178 states and 1325 transitions. [2021-01-06 17:05:50,611 INFO L78 Accepts]: Start accepts. Automaton has 1178 states and 1325 transitions. Word has length 165 [2021-01-06 17:05:50,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:05:50,612 INFO L481 AbstractCegarLoop]: Abstraction has 1178 states and 1325 transitions. [2021-01-06 17:05:50,612 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 17:05:50,612 INFO L276 IsEmpty]: Start isEmpty. Operand 1178 states and 1325 transitions. [2021-01-06 17:05:50,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-01-06 17:05:50,613 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:05:50,613 INFO L422 BasicCegarLoop]: trace histogram [48, 48, 47, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:05:50,813 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-01-06 17:05:50,814 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:05:50,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:05:50,815 INFO L82 PathProgramCache]: Analyzing trace with hash 1555540269, now seen corresponding path program 7 times [2021-01-06 17:05:50,815 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:05:50,815 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479662410] [2021-01-06 17:05:50,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:05:50,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:05:52,196 INFO L134 CoverageAnalysis]: Checked inductivity of 3488 backedges. 913 proven. 2575 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:05:52,196 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479662410] [2021-01-06 17:05:52,196 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1052105165] [2021-01-06 17:05:52,196 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 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:05:52,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:05:52,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 27 conjunts are in the unsatisfiable core [2021-01-06 17:05:52,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:05:53,710 INFO L134 CoverageAnalysis]: Checked inductivity of 3488 backedges. 1778 proven. 852 refuted. 0 times theorem prover too weak. 858 trivial. 0 not checked. [2021-01-06 17:05:53,711 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:05:53,711 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 27] total 77 [2021-01-06 17:05:53,711 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401158620] [2021-01-06 17:05:53,712 INFO L461 AbstractCegarLoop]: Interpolant automaton has 77 states [2021-01-06 17:05:53,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:05:53,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2021-01-06 17:05:53,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1329, Invalid=4523, Unknown=0, NotChecked=0, Total=5852 [2021-01-06 17:05:53,713 INFO L87 Difference]: Start difference. First operand 1178 states and 1325 transitions. Second operand 77 states. [2021-01-06 17:05:56,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:05:56,818 INFO L93 Difference]: Finished difference Result 2412 states and 2752 transitions. [2021-01-06 17:05:56,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-01-06 17:05:56,821 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 165 [2021-01-06 17:05:56,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:05:56,824 INFO L225 Difference]: With dead ends: 2412 [2021-01-06 17:05:56,825 INFO L226 Difference]: Without dead ends: 1441 [2021-01-06 17:05:56,827 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4685 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=4308, Invalid=12204, Unknown=0, NotChecked=0, Total=16512 [2021-01-06 17:05:56,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1441 states. [2021-01-06 17:05:56,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1441 to 1211. [2021-01-06 17:05:56,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1211 states. [2021-01-06 17:05:56,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1211 states to 1211 states and 1359 transitions. [2021-01-06 17:05:56,950 INFO L78 Accepts]: Start accepts. Automaton has 1211 states and 1359 transitions. Word has length 165 [2021-01-06 17:05:56,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:05:56,951 INFO L481 AbstractCegarLoop]: Abstraction has 1211 states and 1359 transitions. [2021-01-06 17:05:56,951 INFO L482 AbstractCegarLoop]: Interpolant automaton has 77 states. [2021-01-06 17:05:56,951 INFO L276 IsEmpty]: Start isEmpty. Operand 1211 states and 1359 transitions. [2021-01-06 17:05:56,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2021-01-06 17:05:56,952 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:05:56,952 INFO L422 BasicCegarLoop]: trace histogram [50, 50, 49, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:05:57,152 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:05:57,153 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:05:57,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:05:57,154 INFO L82 PathProgramCache]: Analyzing trace with hash -1830883295, now seen corresponding path program 8 times [2021-01-06 17:05:57,154 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:05:57,154 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137742731] [2021-01-06 17:05:57,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:05:57,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:05:58,669 INFO L134 CoverageAnalysis]: Checked inductivity of 3783 backedges. 988 proven. 2795 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:05:58,669 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137742731] [2021-01-06 17:05:58,670 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1222160103] [2021-01-06 17:05:58,670 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 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:05:58,756 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 17:05:58,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:05:58,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 30 conjunts are in the unsatisfiable core [2021-01-06 17:05:58,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:06:00,409 INFO L134 CoverageAnalysis]: Checked inductivity of 3783 backedges. 58 proven. 2800 refuted. 0 times theorem prover too weak. 925 trivial. 0 not checked. [2021-01-06 17:06:00,409 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:06:00,409 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 29] total 81 [2021-01-06 17:06:00,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762925952] [2021-01-06 17:06:00,410 INFO L461 AbstractCegarLoop]: Interpolant automaton has 81 states [2021-01-06 17:06:00,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:06:00,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2021-01-06 17:06:00,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1415, Invalid=5065, Unknown=0, NotChecked=0, Total=6480 [2021-01-06 17:06:00,411 INFO L87 Difference]: Start difference. First operand 1211 states and 1359 transitions. Second operand 81 states. [2021-01-06 17:06:03,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:06:03,786 INFO L93 Difference]: Finished difference Result 2124 states and 2404 transitions. [2021-01-06 17:06:03,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-01-06 17:06:03,787 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 171 [2021-01-06 17:06:03,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:06:03,789 INFO L225 Difference]: With dead ends: 2124 [2021-01-06 17:06:03,789 INFO L226 Difference]: Without dead ends: 1610 [2021-01-06 17:06:03,790 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5038 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=4250, Invalid=13306, Unknown=0, NotChecked=0, Total=17556 [2021-01-06 17:06:03,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1610 states. [2021-01-06 17:06:03,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1610 to 1573. [2021-01-06 17:06:03,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1573 states. [2021-01-06 17:06:03,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1573 states to 1573 states and 1783 transitions. [2021-01-06 17:06:03,927 INFO L78 Accepts]: Start accepts. Automaton has 1573 states and 1783 transitions. Word has length 171 [2021-01-06 17:06:03,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:06:03,928 INFO L481 AbstractCegarLoop]: Abstraction has 1573 states and 1783 transitions. [2021-01-06 17:06:03,928 INFO L482 AbstractCegarLoop]: Interpolant automaton has 81 states. [2021-01-06 17:06:03,928 INFO L276 IsEmpty]: Start isEmpty. Operand 1573 states and 1783 transitions. [2021-01-06 17:06:03,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2021-01-06 17:06:03,929 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:06:03,929 INFO L422 BasicCegarLoop]: trace histogram [51, 51, 50, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:06:04,144 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-01-06 17:06:04,145 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:06:04,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:06:04,146 INFO L82 PathProgramCache]: Analyzing trace with hash -1730966685, now seen corresponding path program 9 times [2021-01-06 17:06:04,147 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:06:04,147 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597241555] [2021-01-06 17:06:04,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:06:04,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:06:04,798 INFO L134 CoverageAnalysis]: Checked inductivity of 3935 backedges. 85 proven. 2848 refuted. 0 times theorem prover too weak. 1002 trivial. 0 not checked. [2021-01-06 17:06:04,798 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597241555] [2021-01-06 17:06:04,798 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1654879132] [2021-01-06 17:06:04,798 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 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:06:04,856 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-01-06 17:06:04,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:06:04,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-06 17:06:04,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:06:04,964 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 17:06:05,210 INFO L134 CoverageAnalysis]: Checked inductivity of 3935 backedges. 2007 proven. 2 refuted. 0 times theorem prover too weak. 1926 trivial. 0 not checked. [2021-01-06 17:06:05,211 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:06:05,211 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 6] total 33 [2021-01-06 17:06:05,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285404908] [2021-01-06 17:06:05,211 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-01-06 17:06:05,212 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:06:05,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-01-06 17:06:05,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=390, Invalid=666, Unknown=0, NotChecked=0, Total=1056 [2021-01-06 17:06:05,212 INFO L87 Difference]: Start difference. First operand 1573 states and 1783 transitions. Second operand 33 states. [2021-01-06 17:06:12,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:06:12,118 INFO L93 Difference]: Finished difference Result 3053 states and 3471 transitions. [2021-01-06 17:06:12,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2021-01-06 17:06:12,119 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 174 [2021-01-06 17:06:12,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:06:12,122 INFO L225 Difference]: With dead ends: 3053 [2021-01-06 17:06:12,122 INFO L226 Difference]: Without dead ends: 2060 [2021-01-06 17:06:12,124 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 314 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6312 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=5720, Invalid=14586, Unknown=0, NotChecked=0, Total=20306 [2021-01-06 17:06:12,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2060 states. [2021-01-06 17:06:12,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2060 to 1624. [2021-01-06 17:06:12,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1624 states. [2021-01-06 17:06:12,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1624 states to 1624 states and 1886 transitions. [2021-01-06 17:06:12,264 INFO L78 Accepts]: Start accepts. Automaton has 1624 states and 1886 transitions. Word has length 174 [2021-01-06 17:06:12,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:06:12,264 INFO L481 AbstractCegarLoop]: Abstraction has 1624 states and 1886 transitions. [2021-01-06 17:06:12,264 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2021-01-06 17:06:12,265 INFO L276 IsEmpty]: Start isEmpty. Operand 1624 states and 1886 transitions. [2021-01-06 17:06:12,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2021-01-06 17:06:12,267 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:06:12,267 INFO L422 BasicCegarLoop]: trace histogram [78, 78, 75, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1] [2021-01-06 17:06:12,468 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-01-06 17:06:12,468 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:06:12,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:06:12,469 INFO L82 PathProgramCache]: Analyzing trace with hash 1331899705, now seen corresponding path program 4 times [2021-01-06 17:06:12,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:06:12,470 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483979155] [2021-01-06 17:06:12,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:06:12,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:06:13,295 INFO L134 CoverageAnalysis]: Checked inductivity of 9267 backedges. 4164 proven. 1001 refuted. 0 times theorem prover too weak. 4102 trivial. 0 not checked. [2021-01-06 17:06:13,295 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483979155] [2021-01-06 17:06:13,295 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1345470205] [2021-01-06 17:06:13,295 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 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:06:13,425 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 17:06:13,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:06:13,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 531 conjuncts, 74 conjunts are in the unsatisfiable core [2021-01-06 17:06:13,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:06:17,870 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 17:06:17,871 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 17:06:17,872 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 17:06:18,098 INFO L134 CoverageAnalysis]: Checked inductivity of 9267 backedges. 925 proven. 7341 refuted. 0 times theorem prover too weak. 1001 trivial. 0 not checked. [2021-01-06 17:06:18,098 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:06:18,098 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 62] total 90 [2021-01-06 17:06:18,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282883546] [2021-01-06 17:06:18,099 INFO L461 AbstractCegarLoop]: Interpolant automaton has 90 states [2021-01-06 17:06:18,099 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:06:18,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2021-01-06 17:06:18,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1261, Invalid=6749, Unknown=0, NotChecked=0, Total=8010 [2021-01-06 17:06:18,101 INFO L87 Difference]: Start difference. First operand 1624 states and 1886 transitions. Second operand 90 states. [2021-01-06 17:06:26,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:06:26,520 INFO L93 Difference]: Finished difference Result 3521 states and 4093 transitions. [2021-01-06 17:06:26,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2021-01-06 17:06:26,521 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 263 [2021-01-06 17:06:26,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:06:26,523 INFO L225 Difference]: With dead ends: 3521 [2021-01-06 17:06:26,524 INFO L226 Difference]: Without dead ends: 2326 [2021-01-06 17:06:26,526 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 401 GetRequests, 203 SyntacticMatches, 0 SemanticMatches, 198 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13421 ImplicationChecksByTransitivity, 10.5s TimeCoverageRelationStatistics Valid=6210, Invalid=33590, Unknown=0, NotChecked=0, Total=39800 [2021-01-06 17:06:26,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2326 states. [2021-01-06 17:06:26,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2326 to 1678. [2021-01-06 17:06:26,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1678 states. [2021-01-06 17:06:26,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1678 states to 1678 states and 1940 transitions. [2021-01-06 17:06:26,667 INFO L78 Accepts]: Start accepts. Automaton has 1678 states and 1940 transitions. Word has length 263 [2021-01-06 17:06:26,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:06:26,667 INFO L481 AbstractCegarLoop]: Abstraction has 1678 states and 1940 transitions. [2021-01-06 17:06:26,668 INFO L482 AbstractCegarLoop]: Interpolant automaton has 90 states. [2021-01-06 17:06:26,668 INFO L276 IsEmpty]: Start isEmpty. Operand 1678 states and 1940 transitions. [2021-01-06 17:06:26,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 273 [2021-01-06 17:06:26,671 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:06:26,671 INFO L422 BasicCegarLoop]: trace histogram [81, 81, 78, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1] [2021-01-06 17:06:26,885 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:06:26,886 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:06:26,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:06:26,886 INFO L82 PathProgramCache]: Analyzing trace with hash -282690071, now seen corresponding path program 5 times [2021-01-06 17:06:26,887 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:06:26,887 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469586677] [2021-01-06 17:06:26,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:06:26,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:06:27,700 INFO L134 CoverageAnalysis]: Checked inductivity of 9987 backedges. 4486 proven. 1080 refuted. 0 times theorem prover too weak. 4421 trivial. 0 not checked. [2021-01-06 17:06:27,700 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469586677] [2021-01-06 17:06:27,700 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1429646304] [2021-01-06 17:06:27,700 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 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:06:27,883 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 56 check-sat command(s) [2021-01-06 17:06:27,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:06:27,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 590 conjuncts, 30 conjunts are in the unsatisfiable core [2021-01-06 17:06:27,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:06:29,083 INFO L134 CoverageAnalysis]: Checked inductivity of 9987 backedges. 4486 proven. 1080 refuted. 0 times theorem prover too weak. 4421 trivial. 0 not checked. [2021-01-06 17:06:29,083 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:06:29,083 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 58 [2021-01-06 17:06:29,083 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460268478] [2021-01-06 17:06:29,084 INFO L461 AbstractCegarLoop]: Interpolant automaton has 59 states [2021-01-06 17:06:29,084 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:06:29,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2021-01-06 17:06:29,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1333, Invalid=2089, Unknown=0, NotChecked=0, Total=3422 [2021-01-06 17:06:29,085 INFO L87 Difference]: Start difference. First operand 1678 states and 1940 transitions. Second operand 59 states. [2021-01-06 17:06:29,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:06:29,712 INFO L93 Difference]: Finished difference Result 3245 states and 3772 transitions. [2021-01-06 17:06:29,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-01-06 17:06:29,713 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 272 [2021-01-06 17:06:29,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:06:29,717 INFO L225 Difference]: With dead ends: 3245 [2021-01-06 17:06:29,717 INFO L226 Difference]: Without dead ends: 1814 [2021-01-06 17:06:29,720 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 244 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1509 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1333, Invalid=2089, Unknown=0, NotChecked=0, Total=3422 [2021-01-06 17:06:29,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1814 states. [2021-01-06 17:06:29,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1814 to 1747. [2021-01-06 17:06:29,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1747 states. [2021-01-06 17:06:29,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1747 states to 1747 states and 2014 transitions. [2021-01-06 17:06:29,941 INFO L78 Accepts]: Start accepts. Automaton has 1747 states and 2014 transitions. Word has length 272 [2021-01-06 17:06:29,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:06:29,941 INFO L481 AbstractCegarLoop]: Abstraction has 1747 states and 2014 transitions. [2021-01-06 17:06:29,941 INFO L482 AbstractCegarLoop]: Interpolant automaton has 59 states. [2021-01-06 17:06:29,942 INFO L276 IsEmpty]: Start isEmpty. Operand 1747 states and 2014 transitions. [2021-01-06 17:06:29,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 282 [2021-01-06 17:06:29,945 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:06:29,946 INFO L422 BasicCegarLoop]: trace histogram [84, 84, 81, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1] [2021-01-06 17:06:30,158 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-01-06 17:06:30,159 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:06:30,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:06:30,160 INFO L82 PathProgramCache]: Analyzing trace with hash -407080135, now seen corresponding path program 6 times [2021-01-06 17:06:30,160 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:06:30,160 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151907054] [2021-01-06 17:06:30,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:06:30,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:06:31,034 INFO L134 CoverageAnalysis]: Checked inductivity of 10734 backedges. 4820 proven. 1162 refuted. 0 times theorem prover too weak. 4752 trivial. 0 not checked. [2021-01-06 17:06:31,034 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151907054] [2021-01-06 17:06:31,035 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1361824611] [2021-01-06 17:06:31,035 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 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:06:31,106 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-01-06 17:06:31,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:06:31,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-06 17:06:31,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:06:31,543 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 17:06:31,633 INFO L134 CoverageAnalysis]: Checked inductivity of 10734 backedges. 4914 proven. 1 refuted. 0 times theorem prover too weak. 5819 trivial. 0 not checked. [2021-01-06 17:06:31,634 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:06:31,634 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 8] total 38 [2021-01-06 17:06:31,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677932033] [2021-01-06 17:06:31,635 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-01-06 17:06:31,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:06:31,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-01-06 17:06:31,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=485, Invalid=921, Unknown=0, NotChecked=0, Total=1406 [2021-01-06 17:06:31,635 INFO L87 Difference]: Start difference. First operand 1747 states and 2014 transitions. Second operand 38 states. [2021-01-06 17:06:36,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:06:36,638 INFO L93 Difference]: Finished difference Result 3405 states and 3970 transitions. [2021-01-06 17:06:36,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-01-06 17:06:36,639 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 281 [2021-01-06 17:06:36,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:06:36,639 INFO L225 Difference]: With dead ends: 3405 [2021-01-06 17:06:36,639 INFO L226 Difference]: Without dead ends: 0 [2021-01-06 17:06:36,642 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 377 GetRequests, 277 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2189 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=3231, Invalid=7071, Unknown=0, NotChecked=0, Total=10302 [2021-01-06 17:06:36,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-01-06 17:06:36,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-01-06 17:06:36,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2021-01-06 17:06:36,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-01-06 17:06:36,643 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 281 [2021-01-06 17:06:36,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:06:36,643 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-01-06 17:06:36,643 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2021-01-06 17:06:36,643 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-01-06 17:06:36,644 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-01-06 17:06:36,846 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:06:36,850 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-01-06 17:08:06,170 WARN L197 SmtUtils]: Spent 1.49 m on a formula simplification. DAG size of input: 6330 DAG size of output: 4353 [2021-01-06 17:08:06,609 WARN L197 SmtUtils]: Spent 413.00 ms on a formula simplification. DAG size of input: 293 DAG size of output: 216