/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/in-de61.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-06 16:59:24,022 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 16:59:24,026 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 16:59:24,081 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-06 16:59:24,082 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-06 16:59:24,087 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-06 16:59:24,090 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-06 16:59:24,096 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-06 16:59:24,100 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-06 16:59:24,105 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-06 16:59:24,109 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-06 16:59:24,111 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-06 16:59:24,111 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-06 16:59:24,114 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-06 16:59:24,116 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-06 16:59:24,118 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-06 16:59:24,119 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-06 16:59:24,134 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-06 16:59:24,137 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-06 16:59:24,139 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-06 16:59:24,141 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-06 16:59:24,144 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-06 16:59:24,145 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-06 16:59:24,146 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-06 16:59:24,149 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-01-06 16:59:24,158 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-01-06 16:59:24,159 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-01-06 16:59:24,159 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-01-06 16:59:24,160 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-01-06 16:59:24,162 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-01-06 16:59:24,163 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-01-06 16:59:24,164 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-01-06 16:59:24,168 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-01-06 16:59:24,168 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 16:59:24,173 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 16:59:24,174 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 16:59:24,175 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 16:59:24,224 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 16:59:24,224 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 16:59:24,228 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 16:59:24,229 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 16:59:24,229 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 16:59:24,229 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 16:59:24,230 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 16:59:24,230 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 16:59:24,230 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 16:59:24,230 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 16:59:24,232 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 16:59:24,232 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 16:59:24,232 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 16:59:24,233 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 16:59:24,233 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 16:59:24,233 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 16:59:24,233 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 16:59:24,234 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 16:59:24,234 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 16:59:24,234 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 16:59:24,235 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 16:59:24,235 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 16:59:24,235 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 16:59:24,235 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 16:59:24,236 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 16:59:24,236 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 16:59:24,611 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 16:59:24,652 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 16:59:24,655 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 16:59:24,657 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 16:59:24,657 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 16:59:24,658 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops-crafted-1/in-de61.c [2021-01-06 16:59:24,737 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/9b8782259/a7c8b5fc9ec7483c86601c279a05aea4/FLAGbcdf6b8e1 [2021-01-06 16:59:25,246 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 16:59:25,247 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/loops-crafted-1/in-de61.c [2021-01-06 16:59:25,253 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/9b8782259/a7c8b5fc9ec7483c86601c279a05aea4/FLAGbcdf6b8e1 [2021-01-06 16:59:25,624 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/9b8782259/a7c8b5fc9ec7483c86601c279a05aea4 [2021-01-06 16:59:25,627 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 16:59:25,630 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 16:59:25,632 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 16:59:25,632 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 16:59:25,636 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 16:59:25,637 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 04:59:25" (1/1) ... [2021-01-06 16:59:25,638 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3d309881 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:59:25, skipping insertion in model container [2021-01-06 16:59:25,638 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 04:59:25" (1/1) ... [2021-01-06 16:59:25,647 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 16:59:25,662 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-01-06 16:59:25,814 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/in-de61.c[368,381] left hand side expression in assignment: lhs: VariableLHS[~z~0,] [2021-01-06 16:59:25,834 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 16:59:25,845 INFO L203 MainTranslator]: Completed pre-run [2021-01-06 16:59:25,859 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/in-de61.c[368,381] left hand side expression in assignment: lhs: VariableLHS[~z~0,] [2021-01-06 16:59:25,865 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 16:59:25,881 INFO L208 MainTranslator]: Completed translation [2021-01-06 16:59:25,882 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:59:25 WrapperNode [2021-01-06 16:59:25,882 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 16:59:25,883 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 16:59:25,883 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 16:59:25,883 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 16:59:25,892 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:59:25" (1/1) ... [2021-01-06 16:59:25,900 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:59:25" (1/1) ... [2021-01-06 16:59:25,921 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 16:59:25,922 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 16:59:25,922 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 16:59:25,922 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 16:59:25,932 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:59:25" (1/1) ... [2021-01-06 16:59:25,932 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:59:25" (1/1) ... [2021-01-06 16:59:25,934 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:59:25" (1/1) ... [2021-01-06 16:59:25,934 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:59:25" (1/1) ... [2021-01-06 16:59:25,938 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:59:25" (1/1) ... [2021-01-06 16:59:25,943 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:59:25" (1/1) ... [2021-01-06 16:59:25,945 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:59:25" (1/1) ... [2021-01-06 16:59:25,947 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 16:59:25,948 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 16:59:25,948 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 16:59:25,948 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 16:59:25,949 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:59:25" (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 16:59:26,039 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 16:59:26,039 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 16:59:26,039 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 16:59:26,039 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 16:59:26,315 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 16:59:26,315 INFO L299 CfgBuilder]: Removed 12 assume(true) statements. [2021-01-06 16:59:26,317 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 04:59:26 BoogieIcfgContainer [2021-01-06 16:59:26,317 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 16:59:26,319 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 16:59:26,319 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 16:59:26,323 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 16:59:26,323 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 04:59:25" (1/3) ... [2021-01-06 16:59:26,324 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4406035 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 04:59:26, skipping insertion in model container [2021-01-06 16:59:26,324 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:59:25" (2/3) ... [2021-01-06 16:59:26,325 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4406035 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 04:59:26, skipping insertion in model container [2021-01-06 16:59:26,325 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 04:59:26" (3/3) ... [2021-01-06 16:59:26,360 INFO L111 eAbstractionObserver]: Analyzing ICFG in-de61.c [2021-01-06 16:59:26,369 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 16:59:26,374 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-01-06 16:59:26,398 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-01-06 16:59:26,428 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 16:59:26,428 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 16:59:26,428 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 16:59:26,428 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 16:59:26,429 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 16:59:26,429 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 16:59:26,429 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 16:59:26,429 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 16:59:26,446 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2021-01-06 16:59:26,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-01-06 16:59:26,452 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:59:26,453 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:59:26,453 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:59:26,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:59:26,461 INFO L82 PathProgramCache]: Analyzing trace with hash 1928996963, now seen corresponding path program 1 times [2021-01-06 16:59:26,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:59:26,472 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139204227] [2021-01-06 16:59:26,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:59:26,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:59:26,645 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 16:59:26,646 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139204227] [2021-01-06 16:59:26,647 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 16:59:26,647 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-01-06 16:59:26,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526145524] [2021-01-06 16:59:26,653 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-01-06 16:59:26,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:59:26,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-01-06 16:59:26,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-01-06 16:59:26,674 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 2 states. [2021-01-06 16:59:26,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:59:26,693 INFO L93 Difference]: Finished difference Result 31 states and 53 transitions. [2021-01-06 16:59:26,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-01-06 16:59:26,695 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 12 [2021-01-06 16:59:26,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:59:26,705 INFO L225 Difference]: With dead ends: 31 [2021-01-06 16:59:26,705 INFO L226 Difference]: Without dead ends: 13 [2021-01-06 16:59:26,709 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 16:59:26,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2021-01-06 16:59:26,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2021-01-06 16:59:26,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2021-01-06 16:59:26,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 18 transitions. [2021-01-06 16:59:26,746 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 18 transitions. Word has length 12 [2021-01-06 16:59:26,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:59:26,746 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 18 transitions. [2021-01-06 16:59:26,746 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2021-01-06 16:59:26,746 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 18 transitions. [2021-01-06 16:59:26,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-01-06 16:59:26,747 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:59:26,747 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:59:26,748 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-06 16:59:26,748 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:59:26,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:59:26,749 INFO L82 PathProgramCache]: Analyzing trace with hash 1814480359, now seen corresponding path program 1 times [2021-01-06 16:59:26,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:59:26,749 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175501890] [2021-01-06 16:59:26,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:59:26,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:59:27,229 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 16:59:27,229 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175501890] [2021-01-06 16:59:27,230 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 16:59:27,230 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-01-06 16:59:27,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927799292] [2021-01-06 16:59:27,233 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-06 16:59:27,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:59:27,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-06 16:59:27,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-01-06 16:59:27,234 INFO L87 Difference]: Start difference. First operand 13 states and 18 transitions. Second operand 7 states. [2021-01-06 16:59:27,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:59:27,391 INFO L93 Difference]: Finished difference Result 31 states and 46 transitions. [2021-01-06 16:59:27,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 16:59:27,392 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2021-01-06 16:59:27,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:59:27,392 INFO L225 Difference]: With dead ends: 31 [2021-01-06 16:59:27,393 INFO L226 Difference]: Without dead ends: 14 [2021-01-06 16:59:27,394 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-01-06 16:59:27,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2021-01-06 16:59:27,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2021-01-06 16:59:27,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2021-01-06 16:59:27,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 19 transitions. [2021-01-06 16:59:27,398 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 19 transitions. Word has length 12 [2021-01-06 16:59:27,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:59:27,398 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 19 transitions. [2021-01-06 16:59:27,398 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-06 16:59:27,398 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 19 transitions. [2021-01-06 16:59:27,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-01-06 16:59:27,399 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:59:27,399 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:59:27,399 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-01-06 16:59:27,400 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:59:27,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:59:27,400 INFO L82 PathProgramCache]: Analyzing trace with hash -1427170164, now seen corresponding path program 1 times [2021-01-06 16:59:27,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:59:27,401 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708468291] [2021-01-06 16:59:27,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:59:27,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:59:27,500 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 16:59:27,500 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708468291] [2021-01-06 16:59:27,501 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1684778068] [2021-01-06 16:59:27,501 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 16:59:27,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:59:27,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 7 conjunts are in the unsatisfiable core [2021-01-06 16:59:27,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:59:27,641 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 16:59:27,642 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:59:27,642 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-01-06 16:59:27,642 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501084649] [2021-01-06 16:59:27,643 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-06 16:59:27,643 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:59:27,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-06 16:59:27,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-01-06 16:59:27,644 INFO L87 Difference]: Start difference. First operand 14 states and 19 transitions. Second operand 6 states. [2021-01-06 16:59:27,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:59:27,729 INFO L93 Difference]: Finished difference Result 38 states and 56 transitions. [2021-01-06 16:59:27,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 16:59:27,729 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 13 [2021-01-06 16:59:27,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:59:27,731 INFO L225 Difference]: With dead ends: 38 [2021-01-06 16:59:27,731 INFO L226 Difference]: Without dead ends: 30 [2021-01-06 16:59:27,731 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-01-06 16:59:27,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-01-06 16:59:27,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 26. [2021-01-06 16:59:27,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2021-01-06 16:59:27,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2021-01-06 16:59:27,738 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 13 [2021-01-06 16:59:27,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:59:27,738 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2021-01-06 16:59:27,739 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-06 16:59:27,739 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2021-01-06 16:59:27,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 16:59:27,740 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:59:27,740 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:59:27,953 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-01-06 16:59:27,954 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:59:27,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:59:27,956 INFO L82 PathProgramCache]: Analyzing trace with hash 1160878727, now seen corresponding path program 2 times [2021-01-06 16:59:27,956 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:59:27,957 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395480663] [2021-01-06 16:59:27,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:59:27,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:59:28,082 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:59:28,082 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395480663] [2021-01-06 16:59:28,083 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1445056547] [2021-01-06 16:59:28,083 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 16:59:28,149 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:59:28,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:59:28,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-06 16:59:28,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:59:28,202 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:59:28,202 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:59:28,203 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-01-06 16:59:28,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918674495] [2021-01-06 16:59:28,203 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-06 16:59:28,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:59:28,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-06 16:59:28,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-01-06 16:59:28,205 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 7 states. [2021-01-06 16:59:28,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:59:28,330 INFO L93 Difference]: Finished difference Result 54 states and 82 transitions. [2021-01-06 16:59:28,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 16:59:28,330 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 14 [2021-01-06 16:59:28,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:59:28,332 INFO L225 Difference]: With dead ends: 54 [2021-01-06 16:59:28,332 INFO L226 Difference]: Without dead ends: 46 [2021-01-06 16:59:28,333 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-01-06 16:59:28,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-01-06 16:59:28,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 34. [2021-01-06 16:59:28,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2021-01-06 16:59:28,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2021-01-06 16:59:28,341 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 14 [2021-01-06 16:59:28,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:59:28,341 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2021-01-06 16:59:28,341 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-06 16:59:28,341 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2021-01-06 16:59:28,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-01-06 16:59:28,342 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:59:28,342 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:59:28,556 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:59:28,557 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:59:28,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:59:28,558 INFO L82 PathProgramCache]: Analyzing trace with hash -603304611, now seen corresponding path program 1 times [2021-01-06 16:59:28,559 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:59:28,559 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29047657] [2021-01-06 16:59:28,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:59:28,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:59:28,659 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:59:28,660 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29047657] [2021-01-06 16:59:28,660 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [466697807] [2021-01-06 16:59:28,660 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 16:59:28,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:59:28,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 6 conjunts are in the unsatisfiable core [2021-01-06 16:59:28,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:59:28,742 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 16:59:28,743 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:59:28,743 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4] total 9 [2021-01-06 16:59:28,743 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595476916] [2021-01-06 16:59:28,744 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-01-06 16:59:28,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:59:28,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-01-06 16:59:28,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-01-06 16:59:28,745 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 9 states. [2021-01-06 16:59:29,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:59:29,079 INFO L93 Difference]: Finished difference Result 124 states and 173 transitions. [2021-01-06 16:59:29,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-01-06 16:59:29,079 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2021-01-06 16:59:29,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:59:29,083 INFO L225 Difference]: With dead ends: 124 [2021-01-06 16:59:29,083 INFO L226 Difference]: Without dead ends: 105 [2021-01-06 16:59:29,084 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-01-06 16:59:29,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-01-06 16:59:29,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 55. [2021-01-06 16:59:29,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2021-01-06 16:59:29,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 76 transitions. [2021-01-06 16:59:29,096 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 76 transitions. Word has length 15 [2021-01-06 16:59:29,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:59:29,097 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 76 transitions. [2021-01-06 16:59:29,097 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-01-06 16:59:29,097 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 76 transitions. [2021-01-06 16:59:29,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-01-06 16:59:29,098 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:59:29,098 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:59:29,312 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:59:29,313 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:59:29,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:59:29,314 INFO L82 PathProgramCache]: Analyzing trace with hash -213984276, now seen corresponding path program 3 times [2021-01-06 16:59:29,315 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:59:29,316 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048168904] [2021-01-06 16:59:29,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:59:29,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:59:29,408 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:59:29,408 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048168904] [2021-01-06 16:59:29,409 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [197798964] [2021-01-06 16:59:29,409 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:59:29,481 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-01-06 16:59:29,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:59:29,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 16:59:29,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:59:29,560 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:59:29,561 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:59:29,561 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-01-06 16:59:29,561 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473673386] [2021-01-06 16:59:29,561 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-06 16:59:29,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:59:29,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-06 16:59:29,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-01-06 16:59:29,563 INFO L87 Difference]: Start difference. First operand 55 states and 76 transitions. Second operand 8 states. [2021-01-06 16:59:29,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:59:29,737 INFO L93 Difference]: Finished difference Result 98 states and 147 transitions. [2021-01-06 16:59:29,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-01-06 16:59:29,738 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 15 [2021-01-06 16:59:29,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:59:29,739 INFO L225 Difference]: With dead ends: 98 [2021-01-06 16:59:29,740 INFO L226 Difference]: Without dead ends: 88 [2021-01-06 16:59:29,740 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-01-06 16:59:29,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-01-06 16:59:29,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 68. [2021-01-06 16:59:29,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2021-01-06 16:59:29,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 95 transitions. [2021-01-06 16:59:29,750 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 95 transitions. Word has length 15 [2021-01-06 16:59:29,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:59:29,750 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 95 transitions. [2021-01-06 16:59:29,750 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-01-06 16:59:29,750 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 95 transitions. [2021-01-06 16:59:29,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-01-06 16:59:29,751 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:59:29,752 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:59:29,965 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:59:29,966 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:59:29,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:59:29,967 INFO L82 PathProgramCache]: Analyzing trace with hash 114935591, now seen corresponding path program 4 times [2021-01-06 16:59:29,968 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:59:29,968 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161867547] [2021-01-06 16:59:29,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:59:29,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:59:30,074 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:59:30,074 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161867547] [2021-01-06 16:59:30,075 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [228443699] [2021-01-06 16:59:30,075 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:59:30,126 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 16:59:30,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:59:30,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 16:59:30,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:59:30,176 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:59:30,176 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:59:30,176 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-01-06 16:59:30,177 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146347405] [2021-01-06 16:59:30,177 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-01-06 16:59:30,177 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:59:30,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-01-06 16:59:30,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-01-06 16:59:30,178 INFO L87 Difference]: Start difference. First operand 68 states and 95 transitions. Second operand 9 states. [2021-01-06 16:59:30,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:59:30,392 INFO L93 Difference]: Finished difference Result 116 states and 176 transitions. [2021-01-06 16:59:30,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-06 16:59:30,393 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 16 [2021-01-06 16:59:30,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:59:30,394 INFO L225 Difference]: With dead ends: 116 [2021-01-06 16:59:30,394 INFO L226 Difference]: Without dead ends: 106 [2021-01-06 16:59:30,395 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-01-06 16:59:30,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-01-06 16:59:30,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 81. [2021-01-06 16:59:30,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2021-01-06 16:59:30,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 114 transitions. [2021-01-06 16:59:30,405 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 114 transitions. Word has length 16 [2021-01-06 16:59:30,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:59:30,405 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 114 transitions. [2021-01-06 16:59:30,405 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-01-06 16:59:30,405 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 114 transitions. [2021-01-06 16:59:30,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-01-06 16:59:30,406 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:59:30,407 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:59:30,619 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-01-06 16:59:30,620 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:59:30,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:59:30,621 INFO L82 PathProgramCache]: Analyzing trace with hash 1721516876, now seen corresponding path program 5 times [2021-01-06 16:59:30,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:59:30,622 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497642252] [2021-01-06 16:59:30,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:59:30,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:59:30,777 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:59:30,777 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497642252] [2021-01-06 16:59:30,777 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1628606761] [2021-01-06 16:59:30,777 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:59:30,838 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-01-06 16:59:30,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:59:30,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-06 16:59:30,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:59:30,891 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:59:30,892 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:59:30,892 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-01-06 16:59:30,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760679466] [2021-01-06 16:59:30,893 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-01-06 16:59:30,893 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:59:30,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-01-06 16:59:30,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-01-06 16:59:30,894 INFO L87 Difference]: Start difference. First operand 81 states and 114 transitions. Second operand 10 states. [2021-01-06 16:59:31,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:59:31,139 INFO L93 Difference]: Finished difference Result 134 states and 205 transitions. [2021-01-06 16:59:31,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 16:59:31,139 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2021-01-06 16:59:31,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:59:31,140 INFO L225 Difference]: With dead ends: 134 [2021-01-06 16:59:31,141 INFO L226 Difference]: Without dead ends: 124 [2021-01-06 16:59:31,142 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-01-06 16:59:31,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-01-06 16:59:31,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 94. [2021-01-06 16:59:31,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2021-01-06 16:59:31,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 133 transitions. [2021-01-06 16:59:31,168 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 133 transitions. Word has length 17 [2021-01-06 16:59:31,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:59:31,169 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 133 transitions. [2021-01-06 16:59:31,171 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-01-06 16:59:31,171 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 133 transitions. [2021-01-06 16:59:31,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-01-06 16:59:31,172 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:59:31,173 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:59:31,376 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:59:31,377 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:59:31,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:59:31,378 INFO L82 PathProgramCache]: Analyzing trace with hash 188466470, now seen corresponding path program 1 times [2021-01-06 16:59:31,379 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:59:31,379 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913242786] [2021-01-06 16:59:31,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:59:31,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:59:31,820 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 16:59:31,820 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913242786] [2021-01-06 16:59:31,820 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1238514167] [2021-01-06 16:59:31,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:59:31,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:59:31,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 35 conjunts are in the unsatisfiable core [2021-01-06 16:59:31,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:59:32,192 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 16:59:32,225 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:59:32,226 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:59:32,226 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-01-06 16:59:32,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409937342] [2021-01-06 16:59:32,227 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 16:59:32,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:59:32,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 16:59:32,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-01-06 16:59:32,228 INFO L87 Difference]: Start difference. First operand 94 states and 133 transitions. Second operand 17 states. [2021-01-06 16:59:32,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:59:32,857 INFO L93 Difference]: Finished difference Result 112 states and 151 transitions. [2021-01-06 16:59:32,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-01-06 16:59:32,858 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 18 [2021-01-06 16:59:32,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:59:32,859 INFO L225 Difference]: With dead ends: 112 [2021-01-06 16:59:32,859 INFO L226 Difference]: Without dead ends: 73 [2021-01-06 16:59:32,860 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2021-01-06 16:59:32,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-01-06 16:59:32,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 70. [2021-01-06 16:59:32,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2021-01-06 16:59:32,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 102 transitions. [2021-01-06 16:59:32,866 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 102 transitions. Word has length 18 [2021-01-06 16:59:32,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:59:32,867 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 102 transitions. [2021-01-06 16:59:32,867 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 16:59:32,867 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 102 transitions. [2021-01-06 16:59:32,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-01-06 16:59:32,868 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:59:32,868 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:59:33,068 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:59:33,069 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:59:33,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:59:33,070 INFO L82 PathProgramCache]: Analyzing trace with hash 748617255, now seen corresponding path program 2 times [2021-01-06 16:59:33,070 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:59:33,071 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391122978] [2021-01-06 16:59:33,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:59:33,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:59:33,175 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:59:33,175 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391122978] [2021-01-06 16:59:33,176 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1508823198] [2021-01-06 16:59:33,176 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:59:33,226 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:59:33,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:59:33,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 16:59:33,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:59:33,291 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-01-06 16:59:33,291 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:59:33,291 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 12 [2021-01-06 16:59:33,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002761783] [2021-01-06 16:59:33,292 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-01-06 16:59:33,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:59:33,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-01-06 16:59:33,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2021-01-06 16:59:33,293 INFO L87 Difference]: Start difference. First operand 70 states and 102 transitions. Second operand 12 states. [2021-01-06 16:59:34,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:59:34,142 INFO L93 Difference]: Finished difference Result 247 states and 349 transitions. [2021-01-06 16:59:34,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-01-06 16:59:34,142 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 18 [2021-01-06 16:59:34,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:59:34,144 INFO L225 Difference]: With dead ends: 247 [2021-01-06 16:59:34,144 INFO L226 Difference]: Without dead ends: 214 [2021-01-06 16:59:34,145 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=152, Invalid=840, Unknown=0, NotChecked=0, Total=992 [2021-01-06 16:59:34,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2021-01-06 16:59:34,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 102. [2021-01-06 16:59:34,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2021-01-06 16:59:34,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 142 transitions. [2021-01-06 16:59:34,154 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 142 transitions. Word has length 18 [2021-01-06 16:59:34,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:59:34,155 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 142 transitions. [2021-01-06 16:59:34,155 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-01-06 16:59:34,155 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 142 transitions. [2021-01-06 16:59:34,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-01-06 16:59:34,156 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:59:34,156 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:59:34,371 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-01-06 16:59:34,372 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:59:34,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:59:34,373 INFO L82 PathProgramCache]: Analyzing trace with hash -14070841, now seen corresponding path program 6 times [2021-01-06 16:59:34,374 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:59:34,374 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736740486] [2021-01-06 16:59:34,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:59:34,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:59:34,505 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:59:34,505 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736740486] [2021-01-06 16:59:34,505 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1162374683] [2021-01-06 16:59:34,506 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 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 16:59:34,575 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-01-06 16:59:34,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:59:34,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 17 conjunts are in the unsatisfiable core [2021-01-06 16:59:34,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:59:34,632 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:59:34,633 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:59:34,633 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-01-06 16:59:34,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766598772] [2021-01-06 16:59:34,633 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-06 16:59:34,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:59:34,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-06 16:59:34,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2021-01-06 16:59:34,635 INFO L87 Difference]: Start difference. First operand 102 states and 142 transitions. Second operand 11 states. [2021-01-06 16:59:34,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:59:34,992 INFO L93 Difference]: Finished difference Result 162 states and 246 transitions. [2021-01-06 16:59:34,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 16:59:34,999 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 18 [2021-01-06 16:59:35,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:59:35,004 INFO L225 Difference]: With dead ends: 162 [2021-01-06 16:59:35,004 INFO L226 Difference]: Without dead ends: 152 [2021-01-06 16:59:35,004 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-01-06 16:59:35,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-01-06 16:59:35,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 117. [2021-01-06 16:59:35,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2021-01-06 16:59:35,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 164 transitions. [2021-01-06 16:59:35,012 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 164 transitions. Word has length 18 [2021-01-06 16:59:35,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:59:35,012 INFO L481 AbstractCegarLoop]: Abstraction has 117 states and 164 transitions. [2021-01-06 16:59:35,012 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-01-06 16:59:35,012 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 164 transitions. [2021-01-06 16:59:35,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-01-06 16:59:35,013 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:59:35,013 INFO L422 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:59:35,225 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:59:35,226 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:59:35,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:59:35,227 INFO L82 PathProgramCache]: Analyzing trace with hash 2017284780, now seen corresponding path program 7 times [2021-01-06 16:59:35,227 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:59:35,227 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764158099] [2021-01-06 16:59:35,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:59:35,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:59:35,380 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:59:35,380 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764158099] [2021-01-06 16:59:35,381 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1980960871] [2021-01-06 16:59:35,381 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 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 16:59:35,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:59:35,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 19 conjunts are in the unsatisfiable core [2021-01-06 16:59:35,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:59:35,483 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:59:35,484 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:59:35,484 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-01-06 16:59:35,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735120206] [2021-01-06 16:59:35,485 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-01-06 16:59:35,485 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:59:35,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-01-06 16:59:35,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2021-01-06 16:59:35,486 INFO L87 Difference]: Start difference. First operand 117 states and 164 transitions. Second operand 12 states. [2021-01-06 16:59:35,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:59:35,855 INFO L93 Difference]: Finished difference Result 182 states and 278 transitions. [2021-01-06 16:59:35,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 16:59:35,856 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 19 [2021-01-06 16:59:35,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:59:35,857 INFO L225 Difference]: With dead ends: 182 [2021-01-06 16:59:35,857 INFO L226 Difference]: Without dead ends: 172 [2021-01-06 16:59:35,858 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2021-01-06 16:59:35,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-01-06 16:59:35,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 132. [2021-01-06 16:59:35,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2021-01-06 16:59:35,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 186 transitions. [2021-01-06 16:59:35,866 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 186 transitions. Word has length 19 [2021-01-06 16:59:35,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:59:35,867 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 186 transitions. [2021-01-06 16:59:35,867 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-01-06 16:59:35,867 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 186 transitions. [2021-01-06 16:59:35,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-01-06 16:59:35,868 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:59:35,868 INFO L422 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:59:36,082 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:59:36,083 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:59:36,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:59:36,084 INFO L82 PathProgramCache]: Analyzing trace with hash 564799591, now seen corresponding path program 8 times [2021-01-06 16:59:36,084 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:59:36,085 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548102918] [2021-01-06 16:59:36,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:59:36,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:59:36,262 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:59:36,262 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548102918] [2021-01-06 16:59:36,263 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [908048466] [2021-01-06 16:59:36,263 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 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 16:59:36,319 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:59:36,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:59:36,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 19 conjunts are in the unsatisfiable core [2021-01-06 16:59:36,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:59:36,362 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:59:36,363 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:59:36,363 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-01-06 16:59:36,363 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731160710] [2021-01-06 16:59:36,364 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-01-06 16:59:36,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:59:36,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-01-06 16:59:36,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2021-01-06 16:59:36,365 INFO L87 Difference]: Start difference. First operand 132 states and 186 transitions. Second operand 12 states. [2021-01-06 16:59:36,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:59:36,842 INFO L93 Difference]: Finished difference Result 202 states and 310 transitions. [2021-01-06 16:59:36,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 16:59:36,842 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 20 [2021-01-06 16:59:36,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:59:36,844 INFO L225 Difference]: With dead ends: 202 [2021-01-06 16:59:36,844 INFO L226 Difference]: Without dead ends: 192 [2021-01-06 16:59:36,845 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-01-06 16:59:36,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2021-01-06 16:59:36,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 147. [2021-01-06 16:59:36,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2021-01-06 16:59:36,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 208 transitions. [2021-01-06 16:59:36,859 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 208 transitions. Word has length 20 [2021-01-06 16:59:36,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:59:36,859 INFO L481 AbstractCegarLoop]: Abstraction has 147 states and 208 transitions. [2021-01-06 16:59:36,859 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-01-06 16:59:36,860 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 208 transitions. [2021-01-06 16:59:36,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-01-06 16:59:36,860 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:59:36,860 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:59:37,075 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-01-06 16:59:37,076 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:59:37,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:59:37,076 INFO L82 PathProgramCache]: Analyzing trace with hash 48319293, now seen corresponding path program 1 times [2021-01-06 16:59:37,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:59:37,077 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510376726] [2021-01-06 16:59:37,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:59:37,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:59:37,196 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-01-06 16:59:37,197 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510376726] [2021-01-06 16:59:37,197 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1977840938] [2021-01-06 16:59:37,197 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 16:59:37,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:59:37,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 16 conjunts are in the unsatisfiable core [2021-01-06 16:59:37,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:59:37,311 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-01-06 16:59:37,311 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:59:37,312 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-01-06 16:59:37,312 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75251010] [2021-01-06 16:59:37,313 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-01-06 16:59:37,313 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:59:37,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-01-06 16:59:37,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-01-06 16:59:37,315 INFO L87 Difference]: Start difference. First operand 147 states and 208 transitions. Second operand 10 states. [2021-01-06 16:59:37,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:59:37,472 INFO L93 Difference]: Finished difference Result 209 states and 295 transitions. [2021-01-06 16:59:37,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 16:59:37,472 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 21 [2021-01-06 16:59:37,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:59:37,474 INFO L225 Difference]: With dead ends: 209 [2021-01-06 16:59:37,474 INFO L226 Difference]: Without dead ends: 172 [2021-01-06 16:59:37,474 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-01-06 16:59:37,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-01-06 16:59:37,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 147. [2021-01-06 16:59:37,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2021-01-06 16:59:37,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 207 transitions. [2021-01-06 16:59:37,482 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 207 transitions. Word has length 21 [2021-01-06 16:59:37,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:59:37,483 INFO L481 AbstractCegarLoop]: Abstraction has 147 states and 207 transitions. [2021-01-06 16:59:37,483 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-01-06 16:59:37,483 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 207 transitions. [2021-01-06 16:59:37,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-01-06 16:59:37,484 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:59:37,484 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:59:37,697 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-01-06 16:59:37,698 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:59:37,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:59:37,699 INFO L82 PathProgramCache]: Analyzing trace with hash 1411583389, now seen corresponding path program 3 times [2021-01-06 16:59:37,699 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:59:37,699 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717887179] [2021-01-06 16:59:37,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:59:37,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:59:37,832 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:59:37,832 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717887179] [2021-01-06 16:59:37,832 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [632890172] [2021-01-06 16:59:37,833 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 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 16:59:37,889 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-01-06 16:59:37,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:59:37,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 16 conjunts are in the unsatisfiable core [2021-01-06 16:59:37,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:59:38,003 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-01-06 16:59:38,003 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:59:38,003 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 6] total 15 [2021-01-06 16:59:38,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024426118] [2021-01-06 16:59:38,004 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-01-06 16:59:38,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:59:38,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-01-06 16:59:38,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=182, Unknown=0, NotChecked=0, Total=210 [2021-01-06 16:59:38,005 INFO L87 Difference]: Start difference. First operand 147 states and 207 transitions. Second operand 15 states. [2021-01-06 16:59:40,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:59:40,903 INFO L93 Difference]: Finished difference Result 516 states and 694 transitions. [2021-01-06 16:59:40,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-01-06 16:59:40,905 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 21 [2021-01-06 16:59:40,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:59:40,908 INFO L225 Difference]: With dead ends: 516 [2021-01-06 16:59:40,908 INFO L226 Difference]: Without dead ends: 472 [2021-01-06 16:59:40,912 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1515 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=524, Invalid=4446, Unknown=0, NotChecked=0, Total=4970 [2021-01-06 16:59:40,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2021-01-06 16:59:40,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 176. [2021-01-06 16:59:40,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2021-01-06 16:59:40,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 249 transitions. [2021-01-06 16:59:40,929 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 249 transitions. Word has length 21 [2021-01-06 16:59:40,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:59:40,930 INFO L481 AbstractCegarLoop]: Abstraction has 176 states and 249 transitions. [2021-01-06 16:59:40,930 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2021-01-06 16:59:40,930 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 249 transitions. [2021-01-06 16:59:40,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-01-06 16:59:40,933 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:59:40,934 INFO L422 BasicCegarLoop]: trace histogram [9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:59:41,148 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-01-06 16:59:41,149 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:59:41,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:59:41,150 INFO L82 PathProgramCache]: Analyzing trace with hash -1512568308, now seen corresponding path program 9 times [2021-01-06 16:59:41,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:59:41,151 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666740467] [2021-01-06 16:59:41,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:59:41,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:59:41,314 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:59:41,314 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666740467] [2021-01-06 16:59:41,315 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318602269] [2021-01-06 16:59:41,315 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 16:59:41,399 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-01-06 16:59:41,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:59:41,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 28 conjunts are in the unsatisfiable core [2021-01-06 16:59:41,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:59:41,501 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:59:41,501 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:59:41,501 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2021-01-06 16:59:41,502 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946341014] [2021-01-06 16:59:41,502 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-01-06 16:59:41,502 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:59:41,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-01-06 16:59:41,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2021-01-06 16:59:41,503 INFO L87 Difference]: Start difference. First operand 176 states and 249 transitions. Second operand 15 states. [2021-01-06 16:59:42,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:59:42,170 INFO L93 Difference]: Finished difference Result 259 states and 396 transitions. [2021-01-06 16:59:42,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-01-06 16:59:42,171 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 21 [2021-01-06 16:59:42,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:59:42,174 INFO L225 Difference]: With dead ends: 259 [2021-01-06 16:59:42,174 INFO L226 Difference]: Without dead ends: 249 [2021-01-06 16:59:42,175 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2021-01-06 16:59:42,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2021-01-06 16:59:42,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 194. [2021-01-06 16:59:42,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2021-01-06 16:59:42,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 276 transitions. [2021-01-06 16:59:42,185 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 276 transitions. Word has length 21 [2021-01-06 16:59:42,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:59:42,185 INFO L481 AbstractCegarLoop]: Abstraction has 194 states and 276 transitions. [2021-01-06 16:59:42,185 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2021-01-06 16:59:42,186 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 276 transitions. [2021-01-06 16:59:42,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-01-06 16:59:42,186 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:59:42,186 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:59:42,399 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:59:42,400 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:59:42,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:59:42,401 INFO L82 PathProgramCache]: Analyzing trace with hash 1372519271, now seen corresponding path program 2 times [2021-01-06 16:59:42,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:59:42,401 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698068589] [2021-01-06 16:59:42,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:59:42,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:59:42,478 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-01-06 16:59:42,479 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698068589] [2021-01-06 16:59:42,482 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1712142307] [2021-01-06 16:59:42,483 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:59:42,527 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:59:42,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:59:42,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-06 16:59:42,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:59:42,569 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-01-06 16:59:42,569 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:59:42,569 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-01-06 16:59:42,569 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245989046] [2021-01-06 16:59:42,570 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 16:59:42,570 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:59:42,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 16:59:42,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-01-06 16:59:42,571 INFO L87 Difference]: Start difference. First operand 194 states and 276 transitions. Second operand 5 states. [2021-01-06 16:59:42,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:59:42,679 INFO L93 Difference]: Finished difference Result 342 states and 466 transitions. [2021-01-06 16:59:42,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-01-06 16:59:42,680 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 22 [2021-01-06 16:59:42,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:59:42,682 INFO L225 Difference]: With dead ends: 342 [2021-01-06 16:59:42,682 INFO L226 Difference]: Without dead ends: 330 [2021-01-06 16:59:42,683 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-01-06 16:59:42,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2021-01-06 16:59:42,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 210. [2021-01-06 16:59:42,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 210 states. [2021-01-06 16:59:42,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 294 transitions. [2021-01-06 16:59:42,696 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 294 transitions. Word has length 22 [2021-01-06 16:59:42,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:59:42,696 INFO L481 AbstractCegarLoop]: Abstraction has 210 states and 294 transitions. [2021-01-06 16:59:42,696 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 16:59:42,696 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 294 transitions. [2021-01-06 16:59:42,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-01-06 16:59:42,697 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:59:42,697 INFO L422 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:59:42,903 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-01-06 16:59:42,904 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:59:42,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:59:42,905 INFO L82 PathProgramCache]: Analyzing trace with hash -1486463737, now seen corresponding path program 10 times [2021-01-06 16:59:42,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:59:42,905 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079058289] [2021-01-06 16:59:42,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:59:42,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:59:43,108 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:59:43,109 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079058289] [2021-01-06 16:59:43,109 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [396370111] [2021-01-06 16:59:43,109 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:59:43,171 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 16:59:43,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:59:43,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 25 conjunts are in the unsatisfiable core [2021-01-06 16:59:43,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:59:43,242 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:59:43,243 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:59:43,243 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-01-06 16:59:43,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689587047] [2021-01-06 16:59:43,243 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-01-06 16:59:43,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:59:43,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-01-06 16:59:43,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=182, Unknown=0, NotChecked=0, Total=210 [2021-01-06 16:59:43,244 INFO L87 Difference]: Start difference. First operand 210 states and 294 transitions. Second operand 15 states. [2021-01-06 16:59:43,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:59:43,837 INFO L93 Difference]: Finished difference Result 310 states and 474 transitions. [2021-01-06 16:59:43,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-01-06 16:59:43,837 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 22 [2021-01-06 16:59:43,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:59:43,839 INFO L225 Difference]: With dead ends: 310 [2021-01-06 16:59:43,839 INFO L226 Difference]: Without dead ends: 296 [2021-01-06 16:59:43,840 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2021-01-06 16:59:43,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2021-01-06 16:59:43,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 229. [2021-01-06 16:59:43,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 229 states. [2021-01-06 16:59:43,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 322 transitions. [2021-01-06 16:59:43,852 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 322 transitions. Word has length 22 [2021-01-06 16:59:43,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:59:43,853 INFO L481 AbstractCegarLoop]: Abstraction has 229 states and 322 transitions. [2021-01-06 16:59:43,853 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2021-01-06 16:59:43,853 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 322 transitions. [2021-01-06 16:59:43,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-01-06 16:59:43,853 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:59:43,854 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:59:44,067 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-01-06 16:59:44,068 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:59:44,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:59:44,069 INFO L82 PathProgramCache]: Analyzing trace with hash 1583718253, now seen corresponding path program 2 times [2021-01-06 16:59:44,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:59:44,070 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735205860] [2021-01-06 16:59:44,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:59:44,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:59:44,214 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-01-06 16:59:44,215 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735205860] [2021-01-06 16:59:44,215 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [738544622] [2021-01-06 16:59:44,215 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 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 16:59:44,271 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:59:44,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:59:44,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 23 conjunts are in the unsatisfiable core [2021-01-06 16:59:44,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:59:44,374 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-01-06 16:59:44,374 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:59:44,374 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12] total 13 [2021-01-06 16:59:44,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670138448] [2021-01-06 16:59:44,376 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-06 16:59:44,376 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:59:44,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-06 16:59:44,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-01-06 16:59:44,377 INFO L87 Difference]: Start difference. First operand 229 states and 322 transitions. Second operand 13 states. [2021-01-06 16:59:44,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:59:44,714 INFO L93 Difference]: Finished difference Result 310 states and 434 transitions. [2021-01-06 16:59:44,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 16:59:44,718 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 23 [2021-01-06 16:59:44,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:59:44,720 INFO L225 Difference]: With dead ends: 310 [2021-01-06 16:59:44,720 INFO L226 Difference]: Without dead ends: 266 [2021-01-06 16:59:44,721 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-01-06 16:59:44,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2021-01-06 16:59:44,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 229. [2021-01-06 16:59:44,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 229 states. [2021-01-06 16:59:44,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 321 transitions. [2021-01-06 16:59:44,733 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 321 transitions. Word has length 23 [2021-01-06 16:59:44,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:59:44,733 INFO L481 AbstractCegarLoop]: Abstraction has 229 states and 321 transitions. [2021-01-06 16:59:44,733 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-01-06 16:59:44,733 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 321 transitions. [2021-01-06 16:59:44,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-01-06 16:59:44,734 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:59:44,734 INFO L422 BasicCegarLoop]: trace histogram [11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:59:44,947 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:59:44,948 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:59:44,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:59:44,948 INFO L82 PathProgramCache]: Analyzing trace with hash -677222036, now seen corresponding path program 11 times [2021-01-06 16:59:44,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:59:44,949 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971060060] [2021-01-06 16:59:44,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:59:44,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:59:45,178 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:59:45,179 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971060060] [2021-01-06 16:59:45,179 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [122005309] [2021-01-06 16:59:45,179 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:59:45,504 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-01-06 16:59:45,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:59:45,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 25 conjunts are in the unsatisfiable core [2021-01-06 16:59:45,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:59:45,546 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:59:45,547 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:59:45,547 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-01-06 16:59:45,547 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054632849] [2021-01-06 16:59:45,547 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-01-06 16:59:45,547 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:59:45,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-01-06 16:59:45,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2021-01-06 16:59:45,548 INFO L87 Difference]: Start difference. First operand 229 states and 321 transitions. Second operand 15 states. [2021-01-06 16:59:46,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:59:46,196 INFO L93 Difference]: Finished difference Result 335 states and 513 transitions. [2021-01-06 16:59:46,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-01-06 16:59:46,197 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 23 [2021-01-06 16:59:46,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:59:46,199 INFO L225 Difference]: With dead ends: 335 [2021-01-06 16:59:46,199 INFO L226 Difference]: Without dead ends: 321 [2021-01-06 16:59:46,199 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2021-01-06 16:59:46,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2021-01-06 16:59:46,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 248. [2021-01-06 16:59:46,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 248 states. [2021-01-06 16:59:46,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 349 transitions. [2021-01-06 16:59:46,213 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 349 transitions. Word has length 23 [2021-01-06 16:59:46,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:59:46,214 INFO L481 AbstractCegarLoop]: Abstraction has 248 states and 349 transitions. [2021-01-06 16:59:46,214 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2021-01-06 16:59:46,214 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 349 transitions. [2021-01-06 16:59:46,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-01-06 16:59:46,215 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:59:46,216 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:59:46,421 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:59:46,421 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:59:46,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:59:46,422 INFO L82 PathProgramCache]: Analyzing trace with hash -11866489, now seen corresponding path program 3 times [2021-01-06 16:59:46,423 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:59:46,423 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219191868] [2021-01-06 16:59:46,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:59:46,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:59:46,884 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-01-06 16:59:46,885 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219191868] [2021-01-06 16:59:46,885 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [350208599] [2021-01-06 16:59:46,885 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 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 16:59:46,982 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-01-06 16:59:46,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:59:46,984 WARN L261 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 59 conjunts are in the unsatisfiable core [2021-01-06 16:59:46,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:59:48,137 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 16:59:48,177 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 16:59:48,228 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:59:48,229 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:59:48,229 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 18] total 22 [2021-01-06 16:59:48,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998877828] [2021-01-06 16:59:48,229 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-01-06 16:59:48,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:59:48,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-01-06 16:59:48,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-01-06 16:59:48,230 INFO L87 Difference]: Start difference. First operand 248 states and 349 transitions. Second operand 22 states. [2021-01-06 16:59:50,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:59:50,049 INFO L93 Difference]: Finished difference Result 303 states and 404 transitions. [2021-01-06 16:59:50,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-01-06 16:59:50,050 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 24 [2021-01-06 16:59:50,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:59:50,052 INFO L225 Difference]: With dead ends: 303 [2021-01-06 16:59:50,052 INFO L226 Difference]: Without dead ends: 228 [2021-01-06 16:59:50,053 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2021-01-06 16:59:50,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2021-01-06 16:59:50,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 228. [2021-01-06 16:59:50,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 228 states. [2021-01-06 16:59:50,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 317 transitions. [2021-01-06 16:59:50,064 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 317 transitions. Word has length 24 [2021-01-06 16:59:50,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:59:50,064 INFO L481 AbstractCegarLoop]: Abstraction has 228 states and 317 transitions. [2021-01-06 16:59:50,064 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2021-01-06 16:59:50,064 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 317 transitions. [2021-01-06 16:59:50,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-01-06 16:59:50,065 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:59:50,065 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:59:50,278 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:59:50,278 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:59:50,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:59:50,279 INFO L82 PathProgramCache]: Analyzing trace with hash -147642777, now seen corresponding path program 4 times [2021-01-06 16:59:50,279 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:59:50,279 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187852976] [2021-01-06 16:59:50,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:59:50,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:59:50,506 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:59:50,506 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187852976] [2021-01-06 16:59:50,506 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1765113059] [2021-01-06 16:59:50,506 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 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 16:59:50,565 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 16:59:50,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:59:50,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 20 conjunts are in the unsatisfiable core [2021-01-06 16:59:50,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:59:50,721 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-01-06 16:59:50,721 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:59:50,721 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 7] total 18 [2021-01-06 16:59:50,722 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563594579] [2021-01-06 16:59:50,722 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-06 16:59:50,722 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:59:50,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-06 16:59:50,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=272, Unknown=0, NotChecked=0, Total=306 [2021-01-06 16:59:50,723 INFO L87 Difference]: Start difference. First operand 228 states and 317 transitions. Second operand 18 states. [2021-01-06 16:59:56,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:59:56,649 INFO L93 Difference]: Finished difference Result 771 states and 1038 transitions. [2021-01-06 16:59:56,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2021-01-06 16:59:56,651 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 24 [2021-01-06 16:59:56,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:59:56,655 INFO L225 Difference]: With dead ends: 771 [2021-01-06 16:59:56,655 INFO L226 Difference]: Without dead ends: 709 [2021-01-06 16:59:56,659 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3704 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=926, Invalid=9994, Unknown=0, NotChecked=0, Total=10920 [2021-01-06 16:59:56,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 709 states. [2021-01-06 16:59:56,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 709 to 266. [2021-01-06 16:59:56,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 266 states. [2021-01-06 16:59:56,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 372 transitions. [2021-01-06 16:59:56,675 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 372 transitions. Word has length 24 [2021-01-06 16:59:56,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:59:56,676 INFO L481 AbstractCegarLoop]: Abstraction has 266 states and 372 transitions. [2021-01-06 16:59:56,676 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2021-01-06 16:59:56,676 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 372 transitions. [2021-01-06 16:59:56,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-01-06 16:59:56,677 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:59:56,677 INFO L422 BasicCegarLoop]: trace histogram [12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:59:56,892 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-01-06 16:59:56,893 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:59:56,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:59:56,893 INFO L82 PathProgramCache]: Analyzing trace with hash -1360533081, now seen corresponding path program 12 times [2021-01-06 16:59:56,894 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:59:56,894 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073476436] [2021-01-06 16:59:56,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:59:56,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:59:57,143 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:59:57,144 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073476436] [2021-01-06 16:59:57,144 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [104879598] [2021-01-06 16:59:57,144 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 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 16:59:57,300 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-01-06 16:59:57,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:59:57,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 47 conjunts are in the unsatisfiable core [2021-01-06 16:59:57,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:59:57,561 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:59:57,561 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:59:57,562 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 21 [2021-01-06 16:59:57,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351359219] [2021-01-06 16:59:57,562 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-06 16:59:57,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:59:57,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-06 16:59:57,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=376, Unknown=0, NotChecked=0, Total=420 [2021-01-06 16:59:57,563 INFO L87 Difference]: Start difference. First operand 266 states and 372 transitions. Second operand 21 states. [2021-01-06 16:59:59,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:59:59,147 INFO L93 Difference]: Finished difference Result 398 states and 608 transitions. [2021-01-06 16:59:59,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-01-06 16:59:59,148 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2021-01-06 16:59:59,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:59:59,150 INFO L225 Difference]: With dead ends: 398 [2021-01-06 16:59:59,150 INFO L226 Difference]: Without dead ends: 384 [2021-01-06 16:59:59,151 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=50, Invalid=412, Unknown=0, NotChecked=0, Total=462 [2021-01-06 16:59:59,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2021-01-06 16:59:59,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 287. [2021-01-06 16:59:59,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 287 states. [2021-01-06 16:59:59,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 403 transitions. [2021-01-06 16:59:59,165 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 403 transitions. Word has length 24 [2021-01-06 16:59:59,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:59:59,166 INFO L481 AbstractCegarLoop]: Abstraction has 287 states and 403 transitions. [2021-01-06 16:59:59,166 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2021-01-06 16:59:59,166 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 403 transitions. [2021-01-06 16:59:59,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-01-06 16:59:59,167 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:59:59,167 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:59:59,370 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-01-06 16:59:59,370 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:59:59,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:59:59,371 INFO L82 PathProgramCache]: Analyzing trace with hash 1419398141, now seen corresponding path program 3 times [2021-01-06 16:59:59,372 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:59:59,372 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599025605] [2021-01-06 16:59:59,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:59:59,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:59:59,506 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-01-06 16:59:59,506 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599025605] [2021-01-06 16:59:59,506 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1534248547] [2021-01-06 16:59:59,506 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:59:59,612 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-01-06 16:59:59,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:59:59,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-06 16:59:59,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:59:59,723 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-01-06 16:59:59,724 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:59:59,724 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6] total 14 [2021-01-06 16:59:59,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130078354] [2021-01-06 16:59:59,724 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-06 16:59:59,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:59:59,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-06 16:59:59,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2021-01-06 16:59:59,725 INFO L87 Difference]: Start difference. First operand 287 states and 403 transitions. Second operand 14 states. [2021-01-06 17:00:00,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:00:00,370 INFO L93 Difference]: Finished difference Result 422 states and 587 transitions. [2021-01-06 17:00:00,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-01-06 17:00:00,371 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 25 [2021-01-06 17:00:00,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:00:00,376 INFO L225 Difference]: With dead ends: 422 [2021-01-06 17:00:00,376 INFO L226 Difference]: Without dead ends: 348 [2021-01-06 17:00:00,377 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2021-01-06 17:00:00,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2021-01-06 17:00:00,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 293. [2021-01-06 17:00:00,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 293 states. [2021-01-06 17:00:00,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 402 transitions. [2021-01-06 17:00:00,393 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 402 transitions. Word has length 25 [2021-01-06 17:00:00,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:00:00,395 INFO L481 AbstractCegarLoop]: Abstraction has 293 states and 402 transitions. [2021-01-06 17:00:00,395 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2021-01-06 17:00:00,395 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 402 transitions. [2021-01-06 17:00:00,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-01-06 17:00:00,396 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:00:00,396 INFO L422 BasicCegarLoop]: trace histogram [13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:00:00,609 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:00:00,610 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:00:00,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:00:00,611 INFO L82 PathProgramCache]: Analyzing trace with hash -1068338996, now seen corresponding path program 13 times [2021-01-06 17:00:00,611 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:00:00,611 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701805601] [2021-01-06 17:00:00,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:00:00,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:00:00,898 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:00:00,898 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701805601] [2021-01-06 17:00:00,899 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [75377637] [2021-01-06 17:00:00,899 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 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 17:00:00,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:00:00,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 31 conjunts are in the unsatisfiable core [2021-01-06 17:00:00,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:00:01,026 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:00:01,026 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:00:01,027 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-01-06 17:00:01,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198552911] [2021-01-06 17:00:01,027 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-06 17:00:01,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:00:01,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-06 17:00:01,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=272, Unknown=0, NotChecked=0, Total=306 [2021-01-06 17:00:01,032 INFO L87 Difference]: Start difference. First operand 293 states and 402 transitions. Second operand 18 states. [2021-01-06 17:00:02,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:00:02,098 INFO L93 Difference]: Finished difference Result 425 states and 636 transitions. [2021-01-06 17:00:02,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-01-06 17:00:02,099 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 25 [2021-01-06 17:00:02,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:00:02,101 INFO L225 Difference]: With dead ends: 425 [2021-01-06 17:00:02,102 INFO L226 Difference]: Without dead ends: 401 [2021-01-06 17:00:02,102 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-01-06 17:00:02,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2021-01-06 17:00:02,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 314. [2021-01-06 17:00:02,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 314 states. [2021-01-06 17:00:02,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 432 transitions. [2021-01-06 17:00:02,116 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 432 transitions. Word has length 25 [2021-01-06 17:00:02,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:00:02,116 INFO L481 AbstractCegarLoop]: Abstraction has 314 states and 432 transitions. [2021-01-06 17:00:02,116 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2021-01-06 17:00:02,116 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 432 transitions. [2021-01-06 17:00:02,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-01-06 17:00:02,117 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:00:02,117 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:00:02,323 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-01-06 17:00:02,324 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:00:02,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:00:02,324 INFO L82 PathProgramCache]: Analyzing trace with hash -1999602746, now seen corresponding path program 4 times [2021-01-06 17:00:02,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:00:02,325 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713560775] [2021-01-06 17:00:02,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:00:02,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:00:02,455 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-01-06 17:00:02,455 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713560775] [2021-01-06 17:00:02,456 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [902372487] [2021-01-06 17:00:02,456 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 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 17:00:02,514 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 17:00:02,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:00:02,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 16 conjunts are in the unsatisfiable core [2021-01-06 17:00:02,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:00:02,607 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-01-06 17:00:02,607 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:00:02,607 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6] total 12 [2021-01-06 17:00:02,608 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876900205] [2021-01-06 17:00:02,608 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-01-06 17:00:02,608 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:00:02,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-01-06 17:00:02,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-01-06 17:00:02,609 INFO L87 Difference]: Start difference. First operand 314 states and 432 transitions. Second operand 12 states. [2021-01-06 17:00:02,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:00:02,853 INFO L93 Difference]: Finished difference Result 575 states and 781 transitions. [2021-01-06 17:00:02,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 17:00:02,854 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 26 [2021-01-06 17:00:02,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:00:02,856 INFO L225 Difference]: With dead ends: 575 [2021-01-06 17:00:02,856 INFO L226 Difference]: Without dead ends: 555 [2021-01-06 17:00:02,856 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-01-06 17:00:02,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 555 states. [2021-01-06 17:00:02,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 555 to 312. [2021-01-06 17:00:02,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 312 states. [2021-01-06 17:00:02,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 427 transitions. [2021-01-06 17:00:02,873 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 427 transitions. Word has length 26 [2021-01-06 17:00:02,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:00:02,873 INFO L481 AbstractCegarLoop]: Abstraction has 312 states and 427 transitions. [2021-01-06 17:00:02,873 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-01-06 17:00:02,873 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 427 transitions. [2021-01-06 17:00:02,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-01-06 17:00:02,874 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:00:02,874 INFO L422 BasicCegarLoop]: trace histogram [14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:00:03,076 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:00:03,077 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:00:03,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:00:03,078 INFO L82 PathProgramCache]: Analyzing trace with hash -600256953, now seen corresponding path program 14 times [2021-01-06 17:00:03,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:00:03,078 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031648210] [2021-01-06 17:00:03,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:00:03,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:00:03,399 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:00:03,400 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031648210] [2021-01-06 17:00:03,400 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [32388860] [2021-01-06 17:00:03,400 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:00:03,454 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 17:00:03,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:00:03,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 33 conjunts are in the unsatisfiable core [2021-01-06 17:00:03,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:00:03,525 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:00:03,525 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:00:03,526 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-01-06 17:00:03,526 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469366757] [2021-01-06 17:00:03,526 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-06 17:00:03,526 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:00:03,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-06 17:00:03,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=306, Unknown=0, NotChecked=0, Total=342 [2021-01-06 17:00:03,527 INFO L87 Difference]: Start difference. First operand 312 states and 427 transitions. Second operand 19 states. [2021-01-06 17:00:04,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:00:04,764 INFO L93 Difference]: Finished difference Result 453 states and 676 transitions. [2021-01-06 17:00:04,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-01-06 17:00:04,765 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 26 [2021-01-06 17:00:04,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:00:04,768 INFO L225 Difference]: With dead ends: 453 [2021-01-06 17:00:04,768 INFO L226 Difference]: Without dead ends: 428 [2021-01-06 17:00:04,769 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2021-01-06 17:00:04,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 428 states. [2021-01-06 17:00:04,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 428 to 333. [2021-01-06 17:00:04,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 333 states. [2021-01-06 17:00:04,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 457 transitions. [2021-01-06 17:00:04,786 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 457 transitions. Word has length 26 [2021-01-06 17:00:04,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:00:04,786 INFO L481 AbstractCegarLoop]: Abstraction has 333 states and 457 transitions. [2021-01-06 17:00:04,786 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-06 17:00:04,786 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 457 transitions. [2021-01-06 17:00:04,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-01-06 17:00:04,787 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:00:04,787 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:00:05,002 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-01-06 17:00:05,003 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:00:05,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:00:05,004 INFO L82 PathProgramCache]: Analyzing trace with hash -833380899, now seen corresponding path program 5 times [2021-01-06 17:00:05,004 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:00:05,004 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137336370] [2021-01-06 17:00:05,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:00:05,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:00:05,238 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:00:05,238 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137336370] [2021-01-06 17:00:05,238 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [456011761] [2021-01-06 17:00:05,238 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 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 17:00:05,354 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-01-06 17:00:05,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:00:05,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 24 conjunts are in the unsatisfiable core [2021-01-06 17:00:05,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:00:05,578 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 5 proven. 25 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-01-06 17:00:05,578 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:00:05,578 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 8] total 21 [2021-01-06 17:00:05,579 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654269979] [2021-01-06 17:00:05,579 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-06 17:00:05,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:00:05,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-06 17:00:05,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=380, Unknown=0, NotChecked=0, Total=420 [2021-01-06 17:00:05,580 INFO L87 Difference]: Start difference. First operand 333 states and 457 transitions. Second operand 21 states. [2021-01-06 17:00:06,454 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2021-01-06 17:00:09,513 WARN L197 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2021-01-06 17:00:12,294 WARN L197 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2021-01-06 17:00:14,298 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2021-01-06 17:00:20,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:00:20,734 INFO L93 Difference]: Finished difference Result 1243 states and 1613 transitions. [2021-01-06 17:00:20,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 152 states. [2021-01-06 17:00:20,735 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 27 [2021-01-06 17:00:20,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:00:20,740 INFO L225 Difference]: With dead ends: 1243 [2021-01-06 17:00:20,740 INFO L226 Difference]: Without dead ends: 1167 [2021-01-06 17:00:20,748 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 166 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10692 ImplicationChecksByTransitivity, 11.6s TimeCoverageRelationStatistics Valid=1863, Invalid=26193, Unknown=0, NotChecked=0, Total=28056 [2021-01-06 17:00:20,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1167 states. [2021-01-06 17:00:20,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1167 to 402. [2021-01-06 17:00:20,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 402 states. [2021-01-06 17:00:20,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 548 transitions. [2021-01-06 17:00:20,770 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 548 transitions. Word has length 27 [2021-01-06 17:00:20,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:00:20,771 INFO L481 AbstractCegarLoop]: Abstraction has 402 states and 548 transitions. [2021-01-06 17:00:20,771 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2021-01-06 17:00:20,771 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 548 transitions. [2021-01-06 17:00:20,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-01-06 17:00:20,772 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:00:20,772 INFO L422 BasicCegarLoop]: trace histogram [15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:00:20,985 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-01-06 17:00:20,985 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:00:20,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:00:20,986 INFO L82 PathProgramCache]: Analyzing trace with hash 1025384492, now seen corresponding path program 15 times [2021-01-06 17:00:20,986 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:00:20,986 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223498811] [2021-01-06 17:00:20,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:00:21,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:00:21,412 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:00:21,412 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223498811] [2021-01-06 17:00:21,412 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [957366331] [2021-01-06 17:00:21,412 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:00:21,797 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-01-06 17:00:21,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:00:21,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 61 conjunts are in the unsatisfiable core [2021-01-06 17:00:21,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:00:22,755 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:00:22,755 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:00:22,755 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 20] total 26 [2021-01-06 17:00:22,756 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745812256] [2021-01-06 17:00:22,756 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-01-06 17:00:22,756 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:00:22,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-01-06 17:00:22,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=594, Unknown=0, NotChecked=0, Total=650 [2021-01-06 17:00:22,757 INFO L87 Difference]: Start difference. First operand 402 states and 548 transitions. Second operand 26 states. [2021-01-06 17:00:24,546 WARN L197 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2021-01-06 17:00:26,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:00:26,188 INFO L93 Difference]: Finished difference Result 604 states and 900 transitions. [2021-01-06 17:00:26,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-01-06 17:00:26,189 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 27 [2021-01-06 17:00:26,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:00:26,192 INFO L225 Difference]: With dead ends: 604 [2021-01-06 17:00:26,192 INFO L226 Difference]: Without dead ends: 578 [2021-01-06 17:00:26,195 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=62, Invalid=640, Unknown=0, NotChecked=0, Total=702 [2021-01-06 17:00:26,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 578 states. [2021-01-06 17:00:26,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 578 to 427. [2021-01-06 17:00:26,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 427 states. [2021-01-06 17:00:26,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 427 states to 427 states and 584 transitions. [2021-01-06 17:00:26,214 INFO L78 Accepts]: Start accepts. Automaton has 427 states and 584 transitions. Word has length 27 [2021-01-06 17:00:26,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:00:26,214 INFO L481 AbstractCegarLoop]: Abstraction has 427 states and 584 transitions. [2021-01-06 17:00:26,214 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2021-01-06 17:00:26,214 INFO L276 IsEmpty]: Start isEmpty. Operand 427 states and 584 transitions. [2021-01-06 17:00:26,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-01-06 17:00:26,215 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:00:26,215 INFO L422 BasicCegarLoop]: trace histogram [16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:00:26,418 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-01-06 17:00:26,419 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:00:26,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:00:26,420 INFO L82 PathProgramCache]: Analyzing trace with hash -119338265, now seen corresponding path program 16 times [2021-01-06 17:00:26,420 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:00:26,420 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75489535] [2021-01-06 17:00:26,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:00:26,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:00:26,918 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:00:26,918 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75489535] [2021-01-06 17:00:26,918 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1604225119] [2021-01-06 17:00:26,918 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:00:26,984 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 17:00:26,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:00:26,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 37 conjunts are in the unsatisfiable core [2021-01-06 17:00:26,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:00:27,059 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:00:27,059 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:00:27,059 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2021-01-06 17:00:27,059 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348765252] [2021-01-06 17:00:27,060 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-06 17:00:27,060 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:00:27,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-06 17:00:27,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=380, Unknown=0, NotChecked=0, Total=420 [2021-01-06 17:00:27,061 INFO L87 Difference]: Start difference. First operand 427 states and 584 transitions. Second operand 21 states. [2021-01-06 17:00:28,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:00:28,894 INFO L93 Difference]: Finished difference Result 602 states and 899 transitions. [2021-01-06 17:00:28,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-01-06 17:00:28,895 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 28 [2021-01-06 17:00:28,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:00:28,898 INFO L225 Difference]: With dead ends: 602 [2021-01-06 17:00:28,898 INFO L226 Difference]: Without dead ends: 576 [2021-01-06 17:00:28,899 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=45, Invalid=417, Unknown=0, NotChecked=0, Total=462 [2021-01-06 17:00:28,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 576 states. [2021-01-06 17:00:28,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 576 to 452. [2021-01-06 17:00:28,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 452 states. [2021-01-06 17:00:28,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 452 states to 452 states and 620 transitions. [2021-01-06 17:00:28,920 INFO L78 Accepts]: Start accepts. Automaton has 452 states and 620 transitions. Word has length 28 [2021-01-06 17:00:28,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:00:28,920 INFO L481 AbstractCegarLoop]: Abstraction has 452 states and 620 transitions. [2021-01-06 17:00:28,920 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2021-01-06 17:00:28,920 INFO L276 IsEmpty]: Start isEmpty. Operand 452 states and 620 transitions. [2021-01-06 17:00:28,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-01-06 17:00:28,921 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:00:28,922 INFO L422 BasicCegarLoop]: trace histogram [17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:00:29,136 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:00:29,137 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:00:29,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:00:29,137 INFO L82 PathProgramCache]: Analyzing trace with hash -1246005364, now seen corresponding path program 17 times [2021-01-06 17:00:29,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:00:29,138 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264354401] [2021-01-06 17:00:29,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:00:29,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:00:29,615 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:00:29,615 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264354401] [2021-01-06 17:00:29,615 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [580675855] [2021-01-06 17:00:29,615 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:00:30,549 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-01-06 17:00:30,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:00:30,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 39 conjunts are in the unsatisfiable core [2021-01-06 17:00:30,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:00:30,647 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:00:30,647 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:00:30,647 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-01-06 17:00:30,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647738352] [2021-01-06 17:00:30,648 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-01-06 17:00:30,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:00:30,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-01-06 17:00:30,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=420, Unknown=0, NotChecked=0, Total=462 [2021-01-06 17:00:30,649 INFO L87 Difference]: Start difference. First operand 452 states and 620 transitions. Second operand 22 states. [2021-01-06 17:00:32,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:00:32,449 INFO L93 Difference]: Finished difference Result 634 states and 949 transitions. [2021-01-06 17:00:32,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-01-06 17:00:32,450 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 29 [2021-01-06 17:00:32,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:00:32,454 INFO L225 Difference]: With dead ends: 634 [2021-01-06 17:00:32,454 INFO L226 Difference]: Without dead ends: 608 [2021-01-06 17:00:32,454 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=47, Invalid=459, Unknown=0, NotChecked=0, Total=506 [2021-01-06 17:00:32,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 608 states. [2021-01-06 17:00:32,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 608 to 477. [2021-01-06 17:00:32,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 477 states. [2021-01-06 17:00:32,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 656 transitions. [2021-01-06 17:00:32,474 INFO L78 Accepts]: Start accepts. Automaton has 477 states and 656 transitions. Word has length 29 [2021-01-06 17:00:32,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:00:32,474 INFO L481 AbstractCegarLoop]: Abstraction has 477 states and 656 transitions. [2021-01-06 17:00:32,474 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2021-01-06 17:00:32,475 INFO L276 IsEmpty]: Start isEmpty. Operand 477 states and 656 transitions. [2021-01-06 17:00:32,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-01-06 17:00:32,485 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:00:32,485 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:00:32,689 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-01-06 17:00:32,689 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:00:32,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:00:32,690 INFO L82 PathProgramCache]: Analyzing trace with hash -1004492410, now seen corresponding path program 5 times [2021-01-06 17:00:32,690 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:00:32,691 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052110501] [2021-01-06 17:00:32,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:00:32,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:00:33,282 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-01-06 17:00:33,282 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052110501] [2021-01-06 17:00:33,283 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1464266074] [2021-01-06 17:00:33,283 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:00:33,517 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-01-06 17:00:33,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:00:33,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 64 conjunts are in the unsatisfiable core [2021-01-06 17:00:33,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:00:35,408 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 17:00:35,431 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 17:00:35,498 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:00:35,498 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:00:35,498 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 21] total 26 [2021-01-06 17:00:35,498 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943063965] [2021-01-06 17:00:35,499 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-01-06 17:00:35,499 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:00:35,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-01-06 17:00:35,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=581, Unknown=0, NotChecked=0, Total=650 [2021-01-06 17:00:35,500 INFO L87 Difference]: Start difference. First operand 477 states and 656 transitions. Second operand 26 states. [2021-01-06 17:00:35,889 WARN L197 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 28 [2021-01-06 17:00:41,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:00:41,921 INFO L93 Difference]: Finished difference Result 570 states and 749 transitions. [2021-01-06 17:00:41,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-01-06 17:00:41,922 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 30 [2021-01-06 17:00:41,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:00:41,924 INFO L225 Difference]: With dead ends: 570 [2021-01-06 17:00:41,924 INFO L226 Difference]: Without dead ends: 449 [2021-01-06 17:00:41,925 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=109, Invalid=883, Unknown=0, NotChecked=0, Total=992 [2021-01-06 17:00:41,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 449 states. [2021-01-06 17:00:41,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 449 to 449. [2021-01-06 17:00:41,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 449 states. [2021-01-06 17:00:41,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 449 states to 449 states and 611 transitions. [2021-01-06 17:00:41,944 INFO L78 Accepts]: Start accepts. Automaton has 449 states and 611 transitions. Word has length 30 [2021-01-06 17:00:41,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:00:41,945 INFO L481 AbstractCegarLoop]: Abstraction has 449 states and 611 transitions. [2021-01-06 17:00:41,945 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2021-01-06 17:00:41,945 INFO L276 IsEmpty]: Start isEmpty. Operand 449 states and 611 transitions. [2021-01-06 17:00:41,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-01-06 17:00:41,946 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:00:41,946 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:00:42,149 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:00:42,150 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:00:42,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:00:42,150 INFO L82 PathProgramCache]: Analyzing trace with hash 1974452903, now seen corresponding path program 4 times [2021-01-06 17:00:42,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:00:42,151 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290459300] [2021-01-06 17:00:42,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:00:42,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:00:42,355 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-01-06 17:00:42,356 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290459300] [2021-01-06 17:00:42,356 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121185777] [2021-01-06 17:00:42,356 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 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 17:00:42,434 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 17:00:42,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:00:42,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 21 conjunts are in the unsatisfiable core [2021-01-06 17:00:42,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:00:42,501 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-01-06 17:00:42,501 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:00:42,502 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-01-06 17:00:42,502 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070951518] [2021-01-06 17:00:42,502 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-06 17:00:42,502 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:00:42,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-06 17:00:42,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2021-01-06 17:00:42,503 INFO L87 Difference]: Start difference. First operand 449 states and 611 transitions. Second operand 13 states. [2021-01-06 17:00:43,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:00:43,054 INFO L93 Difference]: Finished difference Result 574 states and 783 transitions. [2021-01-06 17:00:43,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-01-06 17:00:43,055 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 30 [2021-01-06 17:00:43,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:00:43,057 INFO L225 Difference]: With dead ends: 574 [2021-01-06 17:00:43,057 INFO L226 Difference]: Without dead ends: 508 [2021-01-06 17:00:43,058 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-01-06 17:00:43,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 508 states. [2021-01-06 17:00:43,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 508 to 449. [2021-01-06 17:00:43,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 449 states. [2021-01-06 17:00:43,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 449 states to 449 states and 610 transitions. [2021-01-06 17:00:43,077 INFO L78 Accepts]: Start accepts. Automaton has 449 states and 610 transitions. Word has length 30 [2021-01-06 17:00:43,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:00:43,077 INFO L481 AbstractCegarLoop]: Abstraction has 449 states and 610 transitions. [2021-01-06 17:00:43,077 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-01-06 17:00:43,077 INFO L276 IsEmpty]: Start isEmpty. Operand 449 states and 610 transitions. [2021-01-06 17:00:43,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-01-06 17:00:43,078 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:00:43,078 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:00:43,293 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-01-06 17:00:43,294 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:00:43,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:00:43,295 INFO L82 PathProgramCache]: Analyzing trace with hash 1893940903, now seen corresponding path program 6 times [2021-01-06 17:00:43,295 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:00:43,295 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184968278] [2021-01-06 17:00:43,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:00:43,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:00:43,665 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:00:43,666 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184968278] [2021-01-06 17:00:43,666 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1345331471] [2021-01-06 17:00:43,666 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 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 17:00:43,854 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-01-06 17:00:43,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:00:43,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 28 conjunts are in the unsatisfiable core [2021-01-06 17:00:43,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:00:44,175 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-01-06 17:00:44,175 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:00:44,175 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 9] total 24 [2021-01-06 17:00:44,175 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278394088] [2021-01-06 17:00:44,176 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-01-06 17:00:44,176 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:00:44,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-01-06 17:00:44,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=506, Unknown=0, NotChecked=0, Total=552 [2021-01-06 17:00:44,177 INFO L87 Difference]: Start difference. First operand 449 states and 610 transitions. Second operand 24 states. [2021-01-06 17:00:45,188 WARN L197 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2021-01-06 17:00:45,466 WARN L197 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2021-01-06 17:00:45,990 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2021-01-06 17:00:46,330 WARN L197 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2021-01-06 17:00:47,152 WARN L197 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2021-01-06 17:00:47,386 WARN L197 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2021-01-06 17:00:47,994 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2021-01-06 17:00:48,679 WARN L197 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2021-01-06 17:00:51,396 WARN L197 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2021-01-06 17:00:52,112 WARN L197 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2021-01-06 17:00:52,397 WARN L197 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2021-01-06 17:00:53,259 WARN L197 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2021-01-06 17:00:53,647 WARN L197 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2021-01-06 17:00:53,914 WARN L197 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2021-01-06 17:00:55,224 WARN L197 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2021-01-06 17:00:55,516 WARN L197 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2021-01-06 17:00:55,859 WARN L197 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2021-01-06 17:00:56,943 WARN L197 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2021-01-06 17:00:57,351 WARN L197 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2021-01-06 17:00:57,957 WARN L197 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2021-01-06 17:00:58,217 WARN L197 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2021-01-06 17:00:59,348 WARN L197 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2021-01-06 17:01:00,345 WARN L197 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2021-01-06 17:01:02,587 WARN L197 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2021-01-06 17:01:02,889 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2021-01-06 17:01:03,149 WARN L197 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2021-01-06 17:01:03,442 WARN L197 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2021-01-06 17:01:05,184 WARN L197 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2021-01-06 17:01:05,746 WARN L197 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2021-01-06 17:01:05,985 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2021-01-06 17:01:07,196 WARN L197 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2021-01-06 17:01:07,872 WARN L197 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2021-01-06 17:01:08,138 WARN L197 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2021-01-06 17:01:09,317 WARN L197 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2021-01-06 17:01:09,891 WARN L197 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2021-01-06 17:01:10,199 WARN L197 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2021-01-06 17:01:11,548 WARN L197 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2021-01-06 17:01:11,951 WARN L197 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2021-01-06 17:01:14,263 WARN L197 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2021-01-06 17:01:18,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:01:18,669 INFO L93 Difference]: Finished difference Result 1682 states and 2175 transitions. [2021-01-06 17:01:18,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 222 states. [2021-01-06 17:01:18,670 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 30 [2021-01-06 17:01:18,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:01:18,677 INFO L225 Difference]: With dead ends: 1682 [2021-01-06 17:01:18,677 INFO L226 Difference]: Without dead ends: 1586 [2021-01-06 17:01:18,684 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 239 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23391 ImplicationChecksByTransitivity, 27.4s TimeCoverageRelationStatistics Valid=3138, Invalid=54702, Unknown=0, NotChecked=0, Total=57840 [2021-01-06 17:01:18,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1586 states. [2021-01-06 17:01:18,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1586 to 505. [2021-01-06 17:01:18,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 505 states. [2021-01-06 17:01:18,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 505 states to 505 states and 692 transitions. [2021-01-06 17:01:18,710 INFO L78 Accepts]: Start accepts. Automaton has 505 states and 692 transitions. Word has length 30 [2021-01-06 17:01:18,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:01:18,710 INFO L481 AbstractCegarLoop]: Abstraction has 505 states and 692 transitions. [2021-01-06 17:01:18,710 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2021-01-06 17:01:18,711 INFO L276 IsEmpty]: Start isEmpty. Operand 505 states and 692 transitions. [2021-01-06 17:01:18,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-01-06 17:01:18,712 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:01:18,712 INFO L422 BasicCegarLoop]: trace histogram [18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:01:18,925 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-01-06 17:01:18,926 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:01:18,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:01:18,926 INFO L82 PathProgramCache]: Analyzing trace with hash -1812947065, now seen corresponding path program 18 times [2021-01-06 17:01:18,927 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:01:18,927 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474870961] [2021-01-06 17:01:18,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:01:18,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:01:19,591 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:01:19,591 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474870961] [2021-01-06 17:01:19,591 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972807318] [2021-01-06 17:01:19,591 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 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 17:01:19,873 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-01-06 17:01:19,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:01:19,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 44 conjunts are in the unsatisfiable core [2021-01-06 17:01:19,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:01:19,998 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:01:19,998 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:01:19,999 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2021-01-06 17:01:19,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232318455] [2021-01-06 17:01:19,999 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-01-06 17:01:19,999 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:01:20,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-01-06 17:01:20,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=462, Unknown=0, NotChecked=0, Total=506 [2021-01-06 17:01:20,000 INFO L87 Difference]: Start difference. First operand 505 states and 692 transitions. Second operand 23 states. [2021-01-06 17:01:22,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:01:22,454 INFO L93 Difference]: Finished difference Result 696 states and 1038 transitions. [2021-01-06 17:01:22,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-01-06 17:01:22,455 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 30 [2021-01-06 17:01:22,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:01:22,459 INFO L225 Difference]: With dead ends: 696 [2021-01-06 17:01:22,459 INFO L226 Difference]: Without dead ends: 670 [2021-01-06 17:01:22,460 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=49, Invalid=503, Unknown=0, NotChecked=0, Total=552 [2021-01-06 17:01:22,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 670 states. [2021-01-06 17:01:22,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 670 to 532. [2021-01-06 17:01:22,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 532 states. [2021-01-06 17:01:22,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 532 states to 532 states and 731 transitions. [2021-01-06 17:01:22,481 INFO L78 Accepts]: Start accepts. Automaton has 532 states and 731 transitions. Word has length 30 [2021-01-06 17:01:22,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:01:22,482 INFO L481 AbstractCegarLoop]: Abstraction has 532 states and 731 transitions. [2021-01-06 17:01:22,482 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2021-01-06 17:01:22,482 INFO L276 IsEmpty]: Start isEmpty. Operand 532 states and 731 transitions. [2021-01-06 17:01:22,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-01-06 17:01:22,483 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:01:22,483 INFO L422 BasicCegarLoop]: trace histogram [19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:01:22,686 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-01-06 17:01:22,687 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:01:22,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:01:22,687 INFO L82 PathProgramCache]: Analyzing trace with hash 2086696684, now seen corresponding path program 19 times [2021-01-06 17:01:22,688 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:01:22,688 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669505803] [2021-01-06 17:01:22,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:01:22,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:01:23,377 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:01:23,378 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669505803] [2021-01-06 17:01:23,378 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [278038169] [2021-01-06 17:01:23,378 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 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 17:01:23,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:01:23,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 43 conjunts are in the unsatisfiable core [2021-01-06 17:01:23,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:01:23,560 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:01:23,560 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:01:23,560 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2021-01-06 17:01:23,561 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844672806] [2021-01-06 17:01:23,561 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-01-06 17:01:23,561 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:01:23,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-01-06 17:01:23,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=506, Unknown=0, NotChecked=0, Total=552 [2021-01-06 17:01:23,562 INFO L87 Difference]: Start difference. First operand 532 states and 731 transitions. Second operand 24 states. [2021-01-06 17:01:26,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:01:26,277 INFO L93 Difference]: Finished difference Result 730 states and 1091 transitions. [2021-01-06 17:01:26,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-01-06 17:01:26,278 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 31 [2021-01-06 17:01:26,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:01:26,281 INFO L225 Difference]: With dead ends: 730 [2021-01-06 17:01:26,281 INFO L226 Difference]: Without dead ends: 704 [2021-01-06 17:01:26,282 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=51, Invalid=549, Unknown=0, NotChecked=0, Total=600 [2021-01-06 17:01:26,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 704 states. [2021-01-06 17:01:26,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 704 to 559. [2021-01-06 17:01:26,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 559 states. [2021-01-06 17:01:26,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 559 states to 559 states and 770 transitions. [2021-01-06 17:01:26,303 INFO L78 Accepts]: Start accepts. Automaton has 559 states and 770 transitions. Word has length 31 [2021-01-06 17:01:26,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:01:26,303 INFO L481 AbstractCegarLoop]: Abstraction has 559 states and 770 transitions. [2021-01-06 17:01:26,304 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2021-01-06 17:01:26,304 INFO L276 IsEmpty]: Start isEmpty. Operand 559 states and 770 transitions. [2021-01-06 17:01:26,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-01-06 17:01:26,304 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:01:26,305 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:01:26,505 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-01-06 17:01:26,505 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:01:26,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:01:26,506 INFO L82 PathProgramCache]: Analyzing trace with hash 380203431, now seen corresponding path program 6 times [2021-01-06 17:01:26,506 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:01:26,507 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593125027] [2021-01-06 17:01:26,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:01:26,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:01:26,663 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-01-06 17:01:26,664 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593125027] [2021-01-06 17:01:26,664 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [513260420] [2021-01-06 17:01:26,664 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 17:01:26,772 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-01-06 17:01:26,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:01:26,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 20 conjunts are in the unsatisfiable core [2021-01-06 17:01:26,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:01:26,964 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-01-06 17:01:26,965 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:01:26,965 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2021-01-06 17:01:26,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197023410] [2021-01-06 17:01:26,966 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-06 17:01:26,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:01:26,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-06 17:01:26,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-01-06 17:01:26,966 INFO L87 Difference]: Start difference. First operand 559 states and 770 transitions. Second operand 13 states. [2021-01-06 17:01:28,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:01:28,058 INFO L93 Difference]: Finished difference Result 1459 states and 1989 transitions. [2021-01-06 17:01:28,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-01-06 17:01:28,059 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 32 [2021-01-06 17:01:28,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:01:28,065 INFO L225 Difference]: With dead ends: 1459 [2021-01-06 17:01:28,065 INFO L226 Difference]: Without dead ends: 1279 [2021-01-06 17:01:28,066 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=148, Invalid=314, Unknown=0, NotChecked=0, Total=462 [2021-01-06 17:01:28,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1279 states. [2021-01-06 17:01:28,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1279 to 655. [2021-01-06 17:01:28,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 655 states. [2021-01-06 17:01:28,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 655 states to 655 states and 893 transitions. [2021-01-06 17:01:28,100 INFO L78 Accepts]: Start accepts. Automaton has 655 states and 893 transitions. Word has length 32 [2021-01-06 17:01:28,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:01:28,100 INFO L481 AbstractCegarLoop]: Abstraction has 655 states and 893 transitions. [2021-01-06 17:01:28,100 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-01-06 17:01:28,100 INFO L276 IsEmpty]: Start isEmpty. Operand 655 states and 893 transitions. [2021-01-06 17:01:28,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-01-06 17:01:28,102 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:01:28,102 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:01:28,316 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-01-06 17:01:28,317 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:01:28,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:01:28,317 INFO L82 PathProgramCache]: Analyzing trace with hash -404867559, now seen corresponding path program 5 times [2021-01-06 17:01:28,318 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:01:28,318 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119899033] [2021-01-06 17:01:28,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:01:28,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:01:28,575 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-01-06 17:01:28,575 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119899033] [2021-01-06 17:01:28,575 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2138524269] [2021-01-06 17:01:28,576 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:01:28,972 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-01-06 17:01:28,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:01:28,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 64 conjunts are in the unsatisfiable core [2021-01-06 17:01:28,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:01:29,915 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-01-06 17:01:29,915 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:01:29,915 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 20] total 26 [2021-01-06 17:01:29,915 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935471563] [2021-01-06 17:01:29,916 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-01-06 17:01:29,916 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:01:29,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-01-06 17:01:29,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=579, Unknown=0, NotChecked=0, Total=650 [2021-01-06 17:01:29,917 INFO L87 Difference]: Start difference. First operand 655 states and 893 transitions. Second operand 26 states. [2021-01-06 17:01:31,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:01:31,890 INFO L93 Difference]: Finished difference Result 777 states and 1037 transitions. [2021-01-06 17:01:31,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-01-06 17:01:31,892 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 32 [2021-01-06 17:01:31,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:01:31,894 INFO L225 Difference]: With dead ends: 777 [2021-01-06 17:01:31,894 INFO L226 Difference]: Without dead ends: 758 [2021-01-06 17:01:31,895 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=86, Invalid=726, Unknown=0, NotChecked=0, Total=812 [2021-01-06 17:01:31,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 758 states. [2021-01-06 17:01:31,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 758 to 655. [2021-01-06 17:01:31,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 655 states. [2021-01-06 17:01:31,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 655 states to 655 states and 892 transitions. [2021-01-06 17:01:31,923 INFO L78 Accepts]: Start accepts. Automaton has 655 states and 892 transitions. Word has length 32 [2021-01-06 17:01:31,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:01:31,923 INFO L481 AbstractCegarLoop]: Abstraction has 655 states and 892 transitions. [2021-01-06 17:01:31,923 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2021-01-06 17:01:31,923 INFO L276 IsEmpty]: Start isEmpty. Operand 655 states and 892 transitions. [2021-01-06 17:01:31,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-01-06 17:01:31,924 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:01:31,924 INFO L422 BasicCegarLoop]: trace histogram [20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:01:32,128 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-01-06 17:01:32,128 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:01:32,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:01:32,129 INFO L82 PathProgramCache]: Analyzing trace with hash -1578398681, now seen corresponding path program 20 times [2021-01-06 17:01:32,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:01:32,130 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885699659] [2021-01-06 17:01:32,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:01:32,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:01:32,861 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:01:32,861 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885699659] [2021-01-06 17:01:32,861 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [976416175] [2021-01-06 17:01:32,861 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 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:01:32,923 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 17:01:32,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:01:32,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 45 conjunts are in the unsatisfiable core [2021-01-06 17:01:32,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:01:33,050 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:01:33,051 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:01:33,051 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2021-01-06 17:01:33,051 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973608357] [2021-01-06 17:01:33,051 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-01-06 17:01:33,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:01:33,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-01-06 17:01:33,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=552, Unknown=0, NotChecked=0, Total=600 [2021-01-06 17:01:33,052 INFO L87 Difference]: Start difference. First operand 655 states and 892 transitions. Second operand 25 states. [2021-01-06 17:01:36,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:01:36,447 INFO L93 Difference]: Finished difference Result 949 states and 1428 transitions. [2021-01-06 17:01:36,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-01-06 17:01:36,449 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 32 [2021-01-06 17:01:36,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:01:36,454 INFO L225 Difference]: With dead ends: 949 [2021-01-06 17:01:36,454 INFO L226 Difference]: Without dead ends: 911 [2021-01-06 17:01:36,454 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=53, Invalid=597, Unknown=0, NotChecked=0, Total=650 [2021-01-06 17:01:36,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 911 states. [2021-01-06 17:01:36,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 911 to 687. [2021-01-06 17:01:36,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 687 states. [2021-01-06 17:01:36,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 687 states to 687 states and 938 transitions. [2021-01-06 17:01:36,483 INFO L78 Accepts]: Start accepts. Automaton has 687 states and 938 transitions. Word has length 32 [2021-01-06 17:01:36,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:01:36,483 INFO L481 AbstractCegarLoop]: Abstraction has 687 states and 938 transitions. [2021-01-06 17:01:36,483 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2021-01-06 17:01:36,483 INFO L276 IsEmpty]: Start isEmpty. Operand 687 states and 938 transitions. [2021-01-06 17:01:36,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-01-06 17:01:36,485 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:01:36,485 INFO L422 BasicCegarLoop]: trace histogram [21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:01:36,699 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-01-06 17:01:36,700 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:01:36,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:01:36,700 INFO L82 PathProgramCache]: Analyzing trace with hash 767761996, now seen corresponding path program 21 times [2021-01-06 17:01:36,700 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:01:36,701 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708619081] [2021-01-06 17:01:36,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:01:36,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:01:37,519 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:01:37,520 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708619081] [2021-01-06 17:01:37,520 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [343512576] [2021-01-06 17:01:37,520 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 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:01:38,661 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-01-06 17:01:38,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:01:38,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 53 conjunts are in the unsatisfiable core [2021-01-06 17:01:38,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:01:38,844 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:01:38,844 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:01:38,844 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2021-01-06 17:01:38,844 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13952602] [2021-01-06 17:01:38,845 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-01-06 17:01:38,845 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:01:38,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-01-06 17:01:38,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=600, Unknown=0, NotChecked=0, Total=650 [2021-01-06 17:01:38,845 INFO L87 Difference]: Start difference. First operand 687 states and 938 transitions. Second operand 26 states. [2021-01-06 17:01:42,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:01:42,425 INFO L93 Difference]: Finished difference Result 991 states and 1494 transitions. [2021-01-06 17:01:42,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-01-06 17:01:42,426 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 33 [2021-01-06 17:01:42,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:01:42,430 INFO L225 Difference]: With dead ends: 991 [2021-01-06 17:01:42,431 INFO L226 Difference]: Without dead ends: 953 [2021-01-06 17:01:42,431 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=55, Invalid=647, Unknown=0, NotChecked=0, Total=702 [2021-01-06 17:01:42,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 953 states. [2021-01-06 17:01:42,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 953 to 719. [2021-01-06 17:01:42,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 719 states. [2021-01-06 17:01:42,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 719 states to 719 states and 984 transitions. [2021-01-06 17:01:42,456 INFO L78 Accepts]: Start accepts. Automaton has 719 states and 984 transitions. Word has length 33 [2021-01-06 17:01:42,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:01:42,456 INFO L481 AbstractCegarLoop]: Abstraction has 719 states and 984 transitions. [2021-01-06 17:01:42,457 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2021-01-06 17:01:42,457 INFO L276 IsEmpty]: Start isEmpty. Operand 719 states and 984 transitions. [2021-01-06 17:01:42,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-01-06 17:01:42,458 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:01:42,458 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:01:42,662 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-01-06 17:01:42,663 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:01:42,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:01:42,663 INFO L82 PathProgramCache]: Analyzing trace with hash -1111633127, now seen corresponding path program 7 times [2021-01-06 17:01:42,664 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:01:42,664 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577182083] [2021-01-06 17:01:42,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:01:42,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:01:43,202 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-01-06 17:01:43,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577182083] [2021-01-06 17:01:43,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [536454398] [2021-01-06 17:01:43,203 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 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:01:43,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:01:43,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 48 conjunts are in the unsatisfiable core [2021-01-06 17:01:43,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:01:43,812 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-01-06 17:01:43,812 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:01:43,812 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 26 [2021-01-06 17:01:43,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055914554] [2021-01-06 17:01:43,813 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-01-06 17:01:43,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:01:43,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-01-06 17:01:43,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=585, Unknown=0, NotChecked=0, Total=650 [2021-01-06 17:01:43,814 INFO L87 Difference]: Start difference. First operand 719 states and 984 transitions. Second operand 26 states. [2021-01-06 17:01:50,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:01:50,546 INFO L93 Difference]: Finished difference Result 1248 states and 1737 transitions. [2021-01-06 17:01:50,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-01-06 17:01:50,549 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 34 [2021-01-06 17:01:50,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:01:50,554 INFO L225 Difference]: With dead ends: 1248 [2021-01-06 17:01:50,554 INFO L226 Difference]: Without dead ends: 1109 [2021-01-06 17:01:50,555 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1653 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=265, Invalid=5435, Unknown=0, NotChecked=0, Total=5700 [2021-01-06 17:01:50,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1109 states. [2021-01-06 17:01:50,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1109 to 767. [2021-01-06 17:01:50,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 767 states. [2021-01-06 17:01:50,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 767 states to 767 states and 1044 transitions. [2021-01-06 17:01:50,577 INFO L78 Accepts]: Start accepts. Automaton has 767 states and 1044 transitions. Word has length 34 [2021-01-06 17:01:50,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:01:50,577 INFO L481 AbstractCegarLoop]: Abstraction has 767 states and 1044 transitions. [2021-01-06 17:01:50,578 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2021-01-06 17:01:50,578 INFO L276 IsEmpty]: Start isEmpty. Operand 767 states and 1044 transitions. [2021-01-06 17:01:50,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-01-06 17:01:50,579 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:01:50,579 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:01:50,788 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:01:50,789 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:01:50,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:01:50,789 INFO L82 PathProgramCache]: Analyzing trace with hash -2062692825, now seen corresponding path program 6 times [2021-01-06 17:01:50,790 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:01:50,790 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306645719] [2021-01-06 17:01:50,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:01:50,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:01:51,183 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-01-06 17:01:51,184 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306645719] [2021-01-06 17:01:51,184 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [473219911] [2021-01-06 17:01:51,184 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:01:51,474 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-01-06 17:01:51,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:01:51,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 28 conjunts are in the unsatisfiable core [2021-01-06 17:01:51,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:01:51,656 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-01-06 17:01:51,656 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:01:51,656 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-01-06 17:01:51,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342977322] [2021-01-06 17:01:51,657 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-01-06 17:01:51,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:01:51,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-01-06 17:01:51,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2021-01-06 17:01:51,657 INFO L87 Difference]: Start difference. First operand 767 states and 1044 transitions. Second operand 15 states. [2021-01-06 17:01:52,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:01:52,863 INFO L93 Difference]: Finished difference Result 887 states and 1184 transitions. [2021-01-06 17:01:52,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-01-06 17:01:52,866 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 34 [2021-01-06 17:01:52,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:01:52,871 INFO L225 Difference]: With dead ends: 887 [2021-01-06 17:01:52,871 INFO L226 Difference]: Without dead ends: 867 [2021-01-06 17:01:52,871 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2021-01-06 17:01:52,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 867 states. [2021-01-06 17:01:52,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 867 to 767. [2021-01-06 17:01:52,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 767 states. [2021-01-06 17:01:52,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 767 states to 767 states and 1043 transitions. [2021-01-06 17:01:52,896 INFO L78 Accepts]: Start accepts. Automaton has 767 states and 1043 transitions. Word has length 34 [2021-01-06 17:01:52,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:01:52,896 INFO L481 AbstractCegarLoop]: Abstraction has 767 states and 1043 transitions. [2021-01-06 17:01:52,896 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2021-01-06 17:01:52,896 INFO L276 IsEmpty]: Start isEmpty. Operand 767 states and 1043 transitions. [2021-01-06 17:01:52,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-01-06 17:01:52,897 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:01:52,898 INFO L422 BasicCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:01:53,101 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:01:53,102 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:01:53,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:01:53,103 INFO L82 PathProgramCache]: Analyzing trace with hash 484298951, now seen corresponding path program 22 times [2021-01-06 17:01:53,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:01:53,103 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867291406] [2021-01-06 17:01:53,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:01:53,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:01:54,046 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:01:54,046 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867291406] [2021-01-06 17:01:54,047 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [140971607] [2021-01-06 17:01:54,047 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:01:54,108 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 17:01:54,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:01:54,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 49 conjunts are in the unsatisfiable core [2021-01-06 17:01:54,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:01:54,242 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:01:54,243 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:01:54,243 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2021-01-06 17:01:54,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242235126] [2021-01-06 17:01:54,243 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-01-06 17:01:54,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:01:54,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-01-06 17:01:54,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=650, Unknown=0, NotChecked=0, Total=702 [2021-01-06 17:01:54,244 INFO L87 Difference]: Start difference. First operand 767 states and 1043 transitions. Second operand 27 states. [2021-01-06 17:01:58,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:01:58,839 INFO L93 Difference]: Finished difference Result 1083 states and 1622 transitions. [2021-01-06 17:01:58,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-01-06 17:01:58,841 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 34 [2021-01-06 17:01:58,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:01:58,845 INFO L225 Difference]: With dead ends: 1083 [2021-01-06 17:01:58,845 INFO L226 Difference]: Without dead ends: 1045 [2021-01-06 17:01:58,846 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=57, Invalid=699, Unknown=0, NotChecked=0, Total=756 [2021-01-06 17:01:58,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1045 states. [2021-01-06 17:01:58,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1045 to 801. [2021-01-06 17:01:58,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 801 states. [2021-01-06 17:01:58,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 801 states to 801 states and 1092 transitions. [2021-01-06 17:01:58,871 INFO L78 Accepts]: Start accepts. Automaton has 801 states and 1092 transitions. Word has length 34 [2021-01-06 17:01:58,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:01:58,871 INFO L481 AbstractCegarLoop]: Abstraction has 801 states and 1092 transitions. [2021-01-06 17:01:58,871 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2021-01-06 17:01:58,871 INFO L276 IsEmpty]: Start isEmpty. Operand 801 states and 1092 transitions. [2021-01-06 17:01:58,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-01-06 17:01:58,873 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:01:58,873 INFO L422 BasicCegarLoop]: trace histogram [23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:01:59,074 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-01-06 17:01:59,075 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:01:59,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:01:59,077 INFO L82 PathProgramCache]: Analyzing trace with hash 286879148, now seen corresponding path program 23 times [2021-01-06 17:01:59,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:01:59,077 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535623079] [2021-01-06 17:01:59,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:01:59,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:02:00,124 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:02:00,124 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535623079] [2021-01-06 17:02:00,124 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1185531161] [2021-01-06 17:02:00,124 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:02:05,487 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-01-06 17:02:05,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:02:05,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 51 conjunts are in the unsatisfiable core [2021-01-06 17:02:05,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:02:05,682 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:02:05,682 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:02:05,683 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2021-01-06 17:02:05,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631243210] [2021-01-06 17:02:05,683 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-01-06 17:02:05,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:02:05,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-01-06 17:02:05,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=702, Unknown=0, NotChecked=0, Total=756 [2021-01-06 17:02:05,684 INFO L87 Difference]: Start difference. First operand 801 states and 1092 transitions. Second operand 28 states. [2021-01-06 17:02:10,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:02:10,468 INFO L93 Difference]: Finished difference Result 1127 states and 1691 transitions. [2021-01-06 17:02:10,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-01-06 17:02:10,469 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 35 [2021-01-06 17:02:10,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:02:10,474 INFO L225 Difference]: With dead ends: 1127 [2021-01-06 17:02:10,474 INFO L226 Difference]: Without dead ends: 1089 [2021-01-06 17:02:10,475 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=59, Invalid=753, Unknown=0, NotChecked=0, Total=812 [2021-01-06 17:02:10,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1089 states. [2021-01-06 17:02:10,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1089 to 835. [2021-01-06 17:02:10,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 835 states. [2021-01-06 17:02:10,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 835 states to 835 states and 1141 transitions. [2021-01-06 17:02:10,501 INFO L78 Accepts]: Start accepts. Automaton has 835 states and 1141 transitions. Word has length 35 [2021-01-06 17:02:10,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:02:10,501 INFO L481 AbstractCegarLoop]: Abstraction has 835 states and 1141 transitions. [2021-01-06 17:02:10,502 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2021-01-06 17:02:10,502 INFO L276 IsEmpty]: Start isEmpty. Operand 835 states and 1141 transitions. [2021-01-06 17:02:10,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-01-06 17:02:10,503 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:02:10,503 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:02:10,707 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:02:10,708 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:02:10,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:02:10,709 INFO L82 PathProgramCache]: Analyzing trace with hash 1563221799, now seen corresponding path program 7 times [2021-01-06 17:02:10,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:02:10,709 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109582476] [2021-01-06 17:02:10,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:02:10,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:02:11,686 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-01-06 17:02:11,687 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109582476] [2021-01-06 17:02:11,687 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [752145553] [2021-01-06 17:02:11,687 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 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:02:11,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:02:11,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 78 conjunts are in the unsatisfiable core [2021-01-06 17:02:11,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:02:13,639 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 17:02:13,656 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 17:02:13,771 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:02:13,771 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:02:13,771 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 25] total 31 [2021-01-06 17:02:13,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338843206] [2021-01-06 17:02:13,772 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-01-06 17:02:13,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:02:13,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-01-06 17:02:13,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=866, Unknown=0, NotChecked=0, Total=930 [2021-01-06 17:02:13,773 INFO L87 Difference]: Start difference. First operand 835 states and 1141 transitions. Second operand 31 states. [2021-01-06 17:02:20,035 WARN L197 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 30 [2021-01-06 17:02:33,515 WARN L197 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 28 [2021-01-06 17:03:01,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:03:01,527 INFO L93 Difference]: Finished difference Result 849 states and 1154 transitions. [2021-01-06 17:03:01,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-01-06 17:03:01,528 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 36 [2021-01-06 17:03:01,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:03:01,531 INFO L225 Difference]: With dead ends: 849 [2021-01-06 17:03:01,531 INFO L226 Difference]: Without dead ends: 819 [2021-01-06 17:03:01,532 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 23.1s TimeCoverageRelationStatistics Valid=174, Invalid=2373, Unknown=3, NotChecked=0, Total=2550 [2021-01-06 17:03:01,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 819 states. [2021-01-06 17:03:01,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 819 to 819. [2021-01-06 17:03:01,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 819 states. [2021-01-06 17:03:01,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 819 states to 819 states and 1124 transitions. [2021-01-06 17:03:01,564 INFO L78 Accepts]: Start accepts. Automaton has 819 states and 1124 transitions. Word has length 36 [2021-01-06 17:03:01,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:03:01,564 INFO L481 AbstractCegarLoop]: Abstraction has 819 states and 1124 transitions. [2021-01-06 17:03:01,564 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2021-01-06 17:03:01,564 INFO L276 IsEmpty]: Start isEmpty. Operand 819 states and 1124 transitions. [2021-01-06 17:03:01,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-01-06 17:03:01,565 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:03:01,565 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:03:01,766 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:03:01,767 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:03:01,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:03:01,767 INFO L82 PathProgramCache]: Analyzing trace with hash 61818599, now seen corresponding path program 8 times [2021-01-06 17:03:01,768 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:03:01,768 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675408173] [2021-01-06 17:03:01,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:03:01,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:03:02,638 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:03:02,638 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675408173] [2021-01-06 17:03:02,638 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664565714] [2021-01-06 17:03:02,639 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 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:03:02,702 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 17:03:02,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:03:02,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 34 conjunts are in the unsatisfiable core [2021-01-06 17:03:02,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:03:03,498 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 8 proven. 64 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-01-06 17:03:03,499 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:03:03,499 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 11] total 30 [2021-01-06 17:03:03,499 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297717965] [2021-01-06 17:03:03,499 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-01-06 17:03:03,499 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:03:03,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-01-06 17:03:03,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=812, Unknown=0, NotChecked=0, Total=870 [2021-01-06 17:03:03,500 INFO L87 Difference]: Start difference. First operand 819 states and 1124 transitions. Second operand 30 states. [2021-01-06 17:03:05,755 WARN L197 SmtUtils]: Spent 402.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2021-01-06 17:03:06,206 WARN L197 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2021-01-06 17:03:07,876 WARN L197 SmtUtils]: Spent 398.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2021-01-06 17:03:09,295 WARN L197 SmtUtils]: Spent 722.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2021-01-06 17:03:10,334 WARN L197 SmtUtils]: Spent 274.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2021-01-06 17:03:11,507 WARN L197 SmtUtils]: Spent 414.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-01-06 17:03:12,584 WARN L197 SmtUtils]: Spent 621.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2021-01-06 17:03:15,065 WARN L197 SmtUtils]: Spent 601.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2021-01-06 17:03:16,990 WARN L197 SmtUtils]: Spent 672.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2021-01-06 17:03:17,888 WARN L197 SmtUtils]: Spent 379.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-01-06 17:03:20,246 WARN L197 SmtUtils]: Spent 1.33 s on a formula simplification that was a NOOP. DAG size: 40 [2021-01-06 17:03:21,801 WARN L197 SmtUtils]: Spent 515.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2021-01-06 17:03:23,180 WARN L197 SmtUtils]: Spent 310.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-01-06 17:03:23,729 WARN L197 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2021-01-06 17:03:24,610 WARN L197 SmtUtils]: Spent 311.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-01-06 17:03:25,961 WARN L197 SmtUtils]: Spent 694.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-01-06 17:03:27,462 WARN L197 SmtUtils]: Spent 510.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2021-01-06 17:03:27,845 WARN L197 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2021-01-06 17:03:28,395 WARN L197 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2021-01-06 17:03:29,028 WARN L197 SmtUtils]: Spent 241.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-01-06 17:03:30,243 WARN L197 SmtUtils]: Spent 574.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2021-01-06 17:03:30,968 WARN L197 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2021-01-06 17:03:31,474 WARN L197 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2021-01-06 17:03:32,181 WARN L197 SmtUtils]: Spent 290.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-01-06 17:03:33,215 WARN L197 SmtUtils]: Spent 317.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2021-01-06 17:03:34,464 WARN L197 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2021-01-06 17:03:35,079 WARN L197 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2021-01-06 17:03:36,113 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2021-01-06 17:03:36,543 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 26