/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/loop-acceleration/simple_4-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-06 16:46:18,365 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 16:46:18,367 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 16:46:18,419 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-06 16:46:18,420 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-06 16:46:18,425 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-06 16:46:18,428 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-06 16:46:18,447 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-06 16:46:18,451 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-06 16:46:18,459 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-06 16:46:18,463 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-06 16:46:18,464 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-06 16:46:18,465 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-06 16:46:18,467 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-06 16:46:18,470 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-06 16:46:18,472 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-06 16:46:18,473 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-06 16:46:18,477 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-06 16:46:18,485 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-06 16:46:18,488 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-06 16:46:18,495 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-06 16:46:18,497 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-06 16:46:18,499 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-06 16:46:18,500 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-06 16:46:18,507 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-01-06 16:46:18,513 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-01-06 16:46:18,514 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-01-06 16:46:18,516 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-01-06 16:46:18,517 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-01-06 16:46:18,518 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-01-06 16:46:18,518 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-01-06 16:46:18,519 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-01-06 16:46:18,519 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-01-06 16:46:18,520 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 16:46:18,521 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 16:46:18,521 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 16:46:18,522 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 16:46:18,578 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 16:46:18,578 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 16:46:18,583 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 16:46:18,583 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 16:46:18,583 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 16:46:18,584 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 16:46:18,584 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 16:46:18,584 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 16:46:18,584 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 16:46:18,585 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 16:46:18,586 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 16:46:18,586 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 16:46:18,586 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 16:46:18,587 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 16:46:18,587 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 16:46:18,587 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 16:46:18,587 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 16:46:18,587 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 16:46:18,588 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 16:46:18,588 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 16:46:18,588 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 16:46:18,588 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 16:46:18,589 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 16:46:18,589 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 16:46:18,589 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 16:46:18,589 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 16:46:19,059 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 16:46:19,085 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 16:46:19,088 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 16:46:19,090 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 16:46:19,091 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 16:46:19,092 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-acceleration/simple_4-1.c [2021-01-06 16:46:19,175 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/32f1e41be/604047fa22a94dff8461fb64da135174/FLAG7b3b27461 [2021-01-06 16:46:19,835 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 16:46:19,835 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/loop-acceleration/simple_4-1.c [2021-01-06 16:46:19,845 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/32f1e41be/604047fa22a94dff8461fb64da135174/FLAG7b3b27461 [2021-01-06 16:46:20,194 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/32f1e41be/604047fa22a94dff8461fb64da135174 [2021-01-06 16:46:20,197 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 16:46:20,200 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 16:46:20,203 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 16:46:20,203 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 16:46:20,208 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 16:46:20,209 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 04:46:20" (1/1) ... [2021-01-06 16:46:20,212 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@78012b7c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:46:20, skipping insertion in model container [2021-01-06 16:46:20,212 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 04:46:20" (1/1) ... [2021-01-06 16:46:20,222 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 16:46:20,241 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-01-06 16:46:20,452 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/loop-acceleration/simple_4-1.c[322,335] [2021-01-06 16:46:20,462 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 16:46:20,472 INFO L203 MainTranslator]: Completed pre-run [2021-01-06 16:46:20,486 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/loop-acceleration/simple_4-1.c[322,335] [2021-01-06 16:46:20,489 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 16:46:20,505 INFO L208 MainTranslator]: Completed translation [2021-01-06 16:46:20,506 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:46:20 WrapperNode [2021-01-06 16:46:20,506 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 16:46:20,508 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 16:46:20,508 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 16:46:20,508 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 16:46:20,517 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:46:20" (1/1) ... [2021-01-06 16:46:20,525 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:46:20" (1/1) ... [2021-01-06 16:46:20,544 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 16:46:20,545 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 16:46:20,545 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 16:46:20,545 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 16:46:20,555 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:46:20" (1/1) ... [2021-01-06 16:46:20,556 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:46:20" (1/1) ... [2021-01-06 16:46:20,557 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:46:20" (1/1) ... [2021-01-06 16:46:20,558 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:46:20" (1/1) ... [2021-01-06 16:46:20,561 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:46:20" (1/1) ... [2021-01-06 16:46:20,565 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:46:20" (1/1) ... [2021-01-06 16:46:20,566 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:46:20" (1/1) ... [2021-01-06 16:46:20,568 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 16:46:20,569 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 16:46:20,569 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 16:46:20,570 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 16:46:20,571 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:46:20" (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 16:46:20,673 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 16:46:20,673 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 16:46:20,673 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 16:46:20,673 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 16:46:20,958 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 16:46:20,959 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-01-06 16:46:20,964 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 04:46:20 BoogieIcfgContainer [2021-01-06 16:46:20,964 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 16:46:20,969 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 16:46:20,969 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 16:46:20,979 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 16:46:20,982 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 04:46:20" (1/3) ... [2021-01-06 16:46:20,983 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2925a2cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 04:46:20, skipping insertion in model container [2021-01-06 16:46:20,983 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:46:20" (2/3) ... [2021-01-06 16:46:20,984 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2925a2cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 04:46:20, skipping insertion in model container [2021-01-06 16:46:20,984 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 04:46:20" (3/3) ... [2021-01-06 16:46:20,986 INFO L111 eAbstractionObserver]: Analyzing ICFG simple_4-1.c [2021-01-06 16:46:21,003 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 16:46:21,013 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-01-06 16:46:21,046 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-01-06 16:46:21,089 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 16:46:21,090 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 16:46:21,090 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 16:46:21,090 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 16:46:21,090 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 16:46:21,091 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 16:46:21,091 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 16:46:21,091 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 16:46:21,110 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states. [2021-01-06 16:46:21,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-01-06 16:46:21,120 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:46:21,122 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-01-06 16:46:21,122 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:46:21,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:46:21,138 INFO L82 PathProgramCache]: Analyzing trace with hash 889633835, now seen corresponding path program 1 times [2021-01-06 16:46:21,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:46:21,153 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797648343] [2021-01-06 16:46:21,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:46:21,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:46:21,526 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 16:46:21,527 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797648343] [2021-01-06 16:46:21,528 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 16:46:21,529 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 16:46:21,529 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903725835] [2021-01-06 16:46:21,535 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 16:46:21,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:46:21,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 16:46:21,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 16:46:21,554 INFO L87 Difference]: Start difference. First operand 10 states. Second operand 3 states. [2021-01-06 16:46:21,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:46:21,587 INFO L93 Difference]: Finished difference Result 18 states and 22 transitions. [2021-01-06 16:46:21,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 16:46:21,590 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 6 [2021-01-06 16:46:21,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:46:21,600 INFO L225 Difference]: With dead ends: 18 [2021-01-06 16:46:21,600 INFO L226 Difference]: Without dead ends: 8 [2021-01-06 16:46:21,604 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 16:46:21,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2021-01-06 16:46:21,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2021-01-06 16:46:21,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-01-06 16:46:21,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2021-01-06 16:46:21,643 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 6 [2021-01-06 16:46:21,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:46:21,644 INFO L481 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2021-01-06 16:46:21,644 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 16:46:21,644 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2021-01-06 16:46:21,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-01-06 16:46:21,645 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:46:21,645 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:46:21,645 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-06 16:46:21,646 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:46:21,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:46:21,647 INFO L82 PathProgramCache]: Analyzing trace with hash 1810510480, now seen corresponding path program 1 times [2021-01-06 16:46:21,647 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:46:21,647 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385055351] [2021-01-06 16:46:21,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:46:21,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:46:21,758 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 16:46:21,758 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385055351] [2021-01-06 16:46:21,759 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1426758809] [2021-01-06 16:46:21,759 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 16:46:21,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:46:21,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 5 conjunts are in the unsatisfiable core [2021-01-06 16:46:21,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:46:21,994 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 16:46:21,995 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:46:21,995 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-01-06 16:46:21,996 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325224778] [2021-01-06 16:46:21,997 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 16:46:21,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:46:22,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 16:46:22,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-01-06 16:46:22,011 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand 5 states. [2021-01-06 16:46:22,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:46:22,044 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2021-01-06 16:46:22,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-06 16:46:22,045 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 7 [2021-01-06 16:46:22,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:46:22,046 INFO L225 Difference]: With dead ends: 13 [2021-01-06 16:46:22,046 INFO L226 Difference]: Without dead ends: 9 [2021-01-06 16:46:22,047 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-01-06 16:46:22,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2021-01-06 16:46:22,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2021-01-06 16:46:22,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-01-06 16:46:22,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2021-01-06 16:46:22,051 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2021-01-06 16:46:22,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:46:22,051 INFO L481 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2021-01-06 16:46:22,051 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 16:46:22,051 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2021-01-06 16:46:22,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-01-06 16:46:22,052 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:46:22,052 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2021-01-06 16:46:22,266 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-01-06 16:46:22,267 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:46:22,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:46:22,269 INFO L82 PathProgramCache]: Analyzing trace with hash 292915403, now seen corresponding path program 2 times [2021-01-06 16:46:22,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:46:22,270 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663991243] [2021-01-06 16:46:22,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:46:22,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:46:22,419 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 16:46:22,419 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663991243] [2021-01-06 16:46:22,419 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1183101610] [2021-01-06 16:46:22,420 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 16:46:22,504 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:46:22,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:46:22,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 7 conjunts are in the unsatisfiable core [2021-01-06 16:46:22,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:46:22,558 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 16:46:22,558 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:46:22,559 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-01-06 16:46:22,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274425898] [2021-01-06 16:46:22,560 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-06 16:46:22,561 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:46:22,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-06 16:46:22,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-01-06 16:46:22,563 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 6 states. [2021-01-06 16:46:22,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:46:22,605 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2021-01-06 16:46:22,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 16:46:22,606 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 8 [2021-01-06 16:46:22,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:46:22,607 INFO L225 Difference]: With dead ends: 14 [2021-01-06 16:46:22,607 INFO L226 Difference]: Without dead ends: 10 [2021-01-06 16:46:22,608 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-01-06 16:46:22,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2021-01-06 16:46:22,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2021-01-06 16:46:22,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-01-06 16:46:22,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2021-01-06 16:46:22,617 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 8 [2021-01-06 16:46:22,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:46:22,618 INFO L481 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2021-01-06 16:46:22,618 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-06 16:46:22,618 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2021-01-06 16:46:22,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-01-06 16:46:22,618 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:46:22,618 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1] [2021-01-06 16:46:22,819 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:46:22,820 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:46:22,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:46:22,821 INFO L82 PathProgramCache]: Analyzing trace with hash 492108272, now seen corresponding path program 3 times [2021-01-06 16:46:22,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:46:22,822 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298238080] [2021-01-06 16:46:22,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:46:22,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:46:22,975 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 16:46:22,975 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298238080] [2021-01-06 16:46:22,976 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [646144269] [2021-01-06 16:46:22,976 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:46:23,058 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-01-06 16:46:23,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:46:23,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-06 16:46:23,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:46:23,104 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 16:46:23,104 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:46:23,105 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-01-06 16:46:23,105 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014231198] [2021-01-06 16:46:23,105 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-06 16:46:23,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:46:23,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-06 16:46:23,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-01-06 16:46:23,108 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand 7 states. [2021-01-06 16:46:23,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:46:23,146 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2021-01-06 16:46:23,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 16:46:23,147 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 9 [2021-01-06 16:46:23,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:46:23,148 INFO L225 Difference]: With dead ends: 15 [2021-01-06 16:46:23,148 INFO L226 Difference]: Without dead ends: 11 [2021-01-06 16:46:23,149 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-01-06 16:46:23,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2021-01-06 16:46:23,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2021-01-06 16:46:23,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2021-01-06 16:46:23,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2021-01-06 16:46:23,154 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 9 [2021-01-06 16:46:23,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:46:23,154 INFO L481 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2021-01-06 16:46:23,154 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-06 16:46:23,154 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2021-01-06 16:46:23,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-01-06 16:46:23,155 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:46:23,155 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2021-01-06 16:46:23,363 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:46:23,364 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:46:23,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:46:23,366 INFO L82 PathProgramCache]: Analyzing trace with hash -1922847381, now seen corresponding path program 4 times [2021-01-06 16:46:23,366 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:46:23,367 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35184074] [2021-01-06 16:46:23,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:46:23,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:46:23,506 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 16:46:23,506 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35184074] [2021-01-06 16:46:23,507 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [880230641] [2021-01-06 16:46:23,507 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:46:23,545 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 16:46:23,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:46:23,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 16:46:23,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:46:23,589 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 16:46:23,590 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:46:23,590 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-01-06 16:46:23,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463581865] [2021-01-06 16:46:23,590 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-06 16:46:23,591 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:46:23,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-06 16:46:23,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-01-06 16:46:23,592 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 8 states. [2021-01-06 16:46:23,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:46:23,628 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2021-01-06 16:46:23,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-01-06 16:46:23,628 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 10 [2021-01-06 16:46:23,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:46:23,629 INFO L225 Difference]: With dead ends: 16 [2021-01-06 16:46:23,629 INFO L226 Difference]: Without dead ends: 12 [2021-01-06 16:46:23,630 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-01-06 16:46:23,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2021-01-06 16:46:23,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2021-01-06 16:46:23,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2021-01-06 16:46:23,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2021-01-06 16:46:23,633 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2021-01-06 16:46:23,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:46:23,634 INFO L481 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2021-01-06 16:46:23,634 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-01-06 16:46:23,634 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2021-01-06 16:46:23,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-01-06 16:46:23,634 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:46:23,635 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1] [2021-01-06 16:46:23,847 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:46:23,848 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:46:23,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:46:23,849 INFO L82 PathProgramCache]: Analyzing trace with hash 522938704, now seen corresponding path program 5 times [2021-01-06 16:46:23,850 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:46:23,850 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389241946] [2021-01-06 16:46:23,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:46:23,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:46:24,020 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 16:46:24,021 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389241946] [2021-01-06 16:46:24,021 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [488375251] [2021-01-06 16:46:24,021 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:46:24,071 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-01-06 16:46:24,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:46:24,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 17 conjunts are in the unsatisfiable core [2021-01-06 16:46:24,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:46:24,140 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 16:46:24,141 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:46:24,141 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-01-06 16:46:24,141 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990774764] [2021-01-06 16:46:24,142 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-01-06 16:46:24,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:46:24,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-01-06 16:46:24,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-01-06 16:46:24,143 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 9 states. [2021-01-06 16:46:24,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:46:24,182 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2021-01-06 16:46:24,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-06 16:46:24,183 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 11 [2021-01-06 16:46:24,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:46:24,183 INFO L225 Difference]: With dead ends: 17 [2021-01-06 16:46:24,183 INFO L226 Difference]: Without dead ends: 13 [2021-01-06 16:46:24,184 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 7 SyntacticMatches, 5 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-01-06 16:46:24,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2021-01-06 16:46:24,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2021-01-06 16:46:24,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2021-01-06 16:46:24,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2021-01-06 16:46:24,187 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2021-01-06 16:46:24,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:46:24,188 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2021-01-06 16:46:24,188 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-01-06 16:46:24,188 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2021-01-06 16:46:24,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-01-06 16:46:24,188 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:46:24,189 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1] [2021-01-06 16:46:24,403 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-01-06 16:46:24,404 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:46:24,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:46:24,405 INFO L82 PathProgramCache]: Analyzing trace with hash -967103989, now seen corresponding path program 6 times [2021-01-06 16:46:24,406 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:46:24,406 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44900540] [2021-01-06 16:46:24,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:46:24,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:46:24,577 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 16:46:24,577 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44900540] [2021-01-06 16:46:24,577 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [243829921] [2021-01-06 16:46:24,577 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:46:24,667 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-01-06 16:46:24,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:46:24,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 17 conjunts are in the unsatisfiable core [2021-01-06 16:46:24,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:46:24,749 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 16:46:24,749 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:46:24,749 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-01-06 16:46:24,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260435327] [2021-01-06 16:46:24,750 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-01-06 16:46:24,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:46:24,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-01-06 16:46:24,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-01-06 16:46:24,751 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 10 states. [2021-01-06 16:46:24,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:46:24,812 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2021-01-06 16:46:24,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 16:46:24,812 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 12 [2021-01-06 16:46:24,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:46:24,813 INFO L225 Difference]: With dead ends: 18 [2021-01-06 16:46:24,813 INFO L226 Difference]: Without dead ends: 14 [2021-01-06 16:46:24,813 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 10 SyntacticMatches, 3 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-01-06 16:46:24,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2021-01-06 16:46:24,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2021-01-06 16:46:24,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2021-01-06 16:46:24,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2021-01-06 16:46:24,817 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2021-01-06 16:46:24,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:46:24,817 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2021-01-06 16:46:24,817 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-01-06 16:46:24,817 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2021-01-06 16:46:24,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-01-06 16:46:24,817 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:46:24,818 INFO L422 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1] [2021-01-06 16:46:25,022 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:46:25,023 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:46:25,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:46:25,024 INFO L82 PathProgramCache]: Analyzing trace with hash 86212784, now seen corresponding path program 7 times [2021-01-06 16:46:25,024 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:46:25,025 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987505356] [2021-01-06 16:46:25,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:46:25,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:46:25,178 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 16:46:25,178 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987505356] [2021-01-06 16:46:25,178 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [944538864] [2021-01-06 16:46:25,178 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:46:25,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:46:25,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 17 conjunts are in the unsatisfiable core [2021-01-06 16:46:25,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:46:25,280 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 16:46:25,280 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:46:25,281 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-01-06 16:46:25,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313283509] [2021-01-06 16:46:25,281 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-06 16:46:25,281 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:46:25,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-06 16:46:25,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-01-06 16:46:25,282 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 11 states. [2021-01-06 16:46:25,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:46:25,343 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2021-01-06 16:46:25,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 16:46:25,344 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 13 [2021-01-06 16:46:25,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:46:25,344 INFO L225 Difference]: With dead ends: 19 [2021-01-06 16:46:25,344 INFO L226 Difference]: Without dead ends: 15 [2021-01-06 16:46:25,345 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-01-06 16:46:25,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-01-06 16:46:25,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2021-01-06 16:46:25,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2021-01-06 16:46:25,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2021-01-06 16:46:25,349 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2021-01-06 16:46:25,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:46:25,349 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2021-01-06 16:46:25,349 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-01-06 16:46:25,349 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2021-01-06 16:46:25,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 16:46:25,350 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:46:25,350 INFO L422 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1] [2021-01-06 16:46:25,565 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:46:25,566 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:46:25,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:46:25,567 INFO L82 PathProgramCache]: Analyzing trace with hash -1620705621, now seen corresponding path program 8 times [2021-01-06 16:46:25,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:46:25,568 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412050847] [2021-01-06 16:46:25,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:46:25,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:46:25,725 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 16:46:25,726 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412050847] [2021-01-06 16:46:25,726 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [295101428] [2021-01-06 16:46:25,726 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 16:46:25,798 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:46:25,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:46:25,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2021-01-06 16:46:25,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:46:25,854 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 16:46:25,855 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:46:25,855 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-01-06 16:46:25,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258598560] [2021-01-06 16:46:25,855 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-01-06 16:46:25,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:46:25,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-01-06 16:46:25,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-01-06 16:46:25,857 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 12 states. [2021-01-06 16:46:25,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:46:25,941 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2021-01-06 16:46:25,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 16:46:25,941 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 14 [2021-01-06 16:46:25,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:46:25,942 INFO L225 Difference]: With dead ends: 20 [2021-01-06 16:46:25,942 INFO L226 Difference]: Without dead ends: 16 [2021-01-06 16:46:25,943 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-01-06 16:46:25,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-01-06 16:46:25,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2021-01-06 16:46:25,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2021-01-06 16:46:25,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2021-01-06 16:46:25,946 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 14 [2021-01-06 16:46:25,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:46:25,947 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2021-01-06 16:46:25,947 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-01-06 16:46:25,947 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2021-01-06 16:46:25,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-01-06 16:46:25,947 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:46:25,948 INFO L422 BasicCegarLoop]: trace histogram [9, 1, 1, 1, 1, 1, 1] [2021-01-06 16:46:26,154 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-01-06 16:46:26,155 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:46:26,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:46:26,156 INFO L82 PathProgramCache]: Analyzing trace with hash 1299398672, now seen corresponding path program 9 times [2021-01-06 16:46:26,156 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:46:26,156 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118390401] [2021-01-06 16:46:26,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:46:26,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:46:26,402 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 16:46:26,403 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118390401] [2021-01-06 16:46:26,403 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [659860565] [2021-01-06 16:46:26,403 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:46:26,493 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-01-06 16:46:26,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:46:26,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 24 conjunts are in the unsatisfiable core [2021-01-06 16:46:26,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:46:26,607 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 16:46:26,608 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:46:26,608 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-01-06 16:46:26,608 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860688096] [2021-01-06 16:46:26,609 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-06 16:46:26,609 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:46:26,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-06 16:46:26,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-01-06 16:46:26,610 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 13 states. [2021-01-06 16:46:26,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:46:26,691 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2021-01-06 16:46:26,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 16:46:26,692 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 15 [2021-01-06 16:46:26,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:46:26,692 INFO L225 Difference]: With dead ends: 21 [2021-01-06 16:46:26,692 INFO L226 Difference]: Without dead ends: 17 [2021-01-06 16:46:26,693 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-01-06 16:46:26,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-01-06 16:46:26,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-01-06 16:46:26,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2021-01-06 16:46:26,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2021-01-06 16:46:26,696 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 15 [2021-01-06 16:46:26,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:46:26,697 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2021-01-06 16:46:26,697 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-01-06 16:46:26,697 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2021-01-06 16:46:26,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-01-06 16:46:26,697 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:46:26,697 INFO L422 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1] [2021-01-06 16:46:26,903 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:46:26,904 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:46:26,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:46:26,905 INFO L82 PathProgramCache]: Analyzing trace with hash 1628318539, now seen corresponding path program 10 times [2021-01-06 16:46:26,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:46:26,906 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352289458] [2021-01-06 16:46:26,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:46:26,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:46:27,102 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 16:46:27,102 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352289458] [2021-01-06 16:46:27,102 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194582574] [2021-01-06 16:46:27,103 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:46:27,138 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 16:46:27,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:46:27,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 23 conjunts are in the unsatisfiable core [2021-01-06 16:46:27,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:46:27,194 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 16:46:27,194 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:46:27,194 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-01-06 16:46:27,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030619619] [2021-01-06 16:46:27,195 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-06 16:46:27,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:46:27,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-06 16:46:27,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-01-06 16:46:27,196 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 14 states. [2021-01-06 16:46:27,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:46:27,301 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2021-01-06 16:46:27,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-01-06 16:46:27,302 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 16 [2021-01-06 16:46:27,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:46:27,303 INFO L225 Difference]: With dead ends: 22 [2021-01-06 16:46:27,303 INFO L226 Difference]: Without dead ends: 18 [2021-01-06 16:46:27,303 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-01-06 16:46:27,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-01-06 16:46:27,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-01-06 16:46:27,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2021-01-06 16:46:27,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2021-01-06 16:46:27,308 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 16 [2021-01-06 16:46:27,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:46:27,308 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2021-01-06 16:46:27,308 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2021-01-06 16:46:27,309 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2021-01-06 16:46:27,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-01-06 16:46:27,309 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:46:27,309 INFO L422 BasicCegarLoop]: trace histogram [11, 1, 1, 1, 1, 1, 1] [2021-01-06 16:46:27,516 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:46:27,516 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:46:27,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:46:27,517 INFO L82 PathProgramCache]: Analyzing trace with hash -1060067472, now seen corresponding path program 11 times [2021-01-06 16:46:27,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:46:27,518 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882753527] [2021-01-06 16:46:27,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:46:27,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:46:27,762 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 16:46:27,762 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882753527] [2021-01-06 16:46:27,763 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [720236353] [2021-01-06 16:46:27,763 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:46:27,938 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-01-06 16:46:27,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:46:27,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 35 conjunts are in the unsatisfiable core [2021-01-06 16:46:27,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:46:28,143 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 16:46:28,144 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:46:28,144 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-01-06 16:46:28,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871174609] [2021-01-06 16:46:28,144 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-01-06 16:46:28,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:46:28,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-01-06 16:46:28,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-01-06 16:46:28,146 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 15 states. [2021-01-06 16:46:28,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:46:28,251 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2021-01-06 16:46:28,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-01-06 16:46:28,251 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 17 [2021-01-06 16:46:28,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:46:28,252 INFO L225 Difference]: With dead ends: 23 [2021-01-06 16:46:28,252 INFO L226 Difference]: Without dead ends: 19 [2021-01-06 16:46:28,253 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 8 SyntacticMatches, 10 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-01-06 16:46:28,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-01-06 16:46:28,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-01-06 16:46:28,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2021-01-06 16:46:28,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2021-01-06 16:46:28,256 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 17 [2021-01-06 16:46:28,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:46:28,257 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2021-01-06 16:46:28,257 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2021-01-06 16:46:28,257 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2021-01-06 16:46:28,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-01-06 16:46:28,257 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:46:28,258 INFO L422 BasicCegarLoop]: trace histogram [12, 1, 1, 1, 1, 1, 1] [2021-01-06 16:46:28,463 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-01-06 16:46:28,463 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:46:28,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:46:28,464 INFO L82 PathProgramCache]: Analyzing trace with hash 1499312107, now seen corresponding path program 12 times [2021-01-06 16:46:28,464 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:46:28,465 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712995516] [2021-01-06 16:46:28,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:46:28,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:46:28,757 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 16:46:28,757 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712995516] [2021-01-06 16:46:28,757 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [564344992] [2021-01-06 16:46:28,758 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:46:28,848 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-01-06 16:46:28,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:46:28,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 27 conjunts are in the unsatisfiable core [2021-01-06 16:46:28,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:46:28,922 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 16:46:28,922 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:46:28,922 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-01-06 16:46:28,923 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338713053] [2021-01-06 16:46:28,923 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-06 16:46:28,923 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:46:28,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-06 16:46:28,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-01-06 16:46:28,924 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 16 states. [2021-01-06 16:46:29,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:46:29,097 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2021-01-06 16:46:29,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-01-06 16:46:29,099 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 18 [2021-01-06 16:46:29,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:46:29,099 INFO L225 Difference]: With dead ends: 24 [2021-01-06 16:46:29,099 INFO L226 Difference]: Without dead ends: 20 [2021-01-06 16:46:29,100 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-01-06 16:46:29,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-01-06 16:46:29,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-01-06 16:46:29,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2021-01-06 16:46:29,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2021-01-06 16:46:29,105 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 18 [2021-01-06 16:46:29,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:46:29,105 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2021-01-06 16:46:29,105 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-01-06 16:46:29,105 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2021-01-06 16:46:29,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-01-06 16:46:29,106 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:46:29,106 INFO L422 BasicCegarLoop]: trace histogram [13, 1, 1, 1, 1, 1, 1] [2021-01-06 16:46:29,308 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-01-06 16:46:29,309 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:46:29,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:46:29,309 INFO L82 PathProgramCache]: Analyzing trace with hash -764299568, now seen corresponding path program 13 times [2021-01-06 16:46:29,310 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:46:29,310 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040055791] [2021-01-06 16:46:29,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:46:29,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:46:29,558 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 16:46:29,559 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040055791] [2021-01-06 16:46:29,559 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [555623223] [2021-01-06 16:46:29,559 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:46:29,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:46:29,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 29 conjunts are in the unsatisfiable core [2021-01-06 16:46:29,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:46:29,665 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 16:46:29,666 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:46:29,666 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-01-06 16:46:29,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369233116] [2021-01-06 16:46:29,667 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 16:46:29,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:46:29,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 16:46:29,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-01-06 16:46:29,668 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 17 states. [2021-01-06 16:46:29,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:46:29,830 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2021-01-06 16:46:29,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-01-06 16:46:29,831 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 19 [2021-01-06 16:46:29,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:46:29,831 INFO L225 Difference]: With dead ends: 25 [2021-01-06 16:46:29,832 INFO L226 Difference]: Without dead ends: 21 [2021-01-06 16:46:29,832 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-01-06 16:46:29,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-01-06 16:46:29,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2021-01-06 16:46:29,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2021-01-06 16:46:29,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2021-01-06 16:46:29,836 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 19 [2021-01-06 16:46:29,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:46:29,837 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2021-01-06 16:46:29,837 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 16:46:29,837 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2021-01-06 16:46:29,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-01-06 16:46:29,837 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:46:29,838 INFO L422 BasicCegarLoop]: trace histogram [14, 1, 1, 1, 1, 1, 1] [2021-01-06 16:46:30,038 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-01-06 16:46:30,039 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:46:30,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:46:30,040 INFO L82 PathProgramCache]: Analyzing trace with hash 2078182539, now seen corresponding path program 14 times [2021-01-06 16:46:30,040 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:46:30,040 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112242850] [2021-01-06 16:46:30,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:46:30,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:46:30,331 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 16:46:30,331 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112242850] [2021-01-06 16:46:30,331 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2103852113] [2021-01-06 16:46:30,332 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:46:30,378 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:46:30,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:46:30,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 37 conjunts are in the unsatisfiable core [2021-01-06 16:46:30,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:46:30,445 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 16:46:30,445 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:46:30,445 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-01-06 16:46:30,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235836690] [2021-01-06 16:46:30,446 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-06 16:46:30,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:46:30,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-06 16:46:30,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-01-06 16:46:30,447 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 18 states. [2021-01-06 16:46:30,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:46:30,638 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2021-01-06 16:46:30,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-01-06 16:46:30,639 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 20 [2021-01-06 16:46:30,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:46:30,639 INFO L225 Difference]: With dead ends: 26 [2021-01-06 16:46:30,639 INFO L226 Difference]: Without dead ends: 22 [2021-01-06 16:46:30,640 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-01-06 16:46:30,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-01-06 16:46:30,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2021-01-06 16:46:30,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2021-01-06 16:46:30,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2021-01-06 16:46:30,644 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 20 [2021-01-06 16:46:30,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:46:30,644 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2021-01-06 16:46:30,644 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2021-01-06 16:46:30,644 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2021-01-06 16:46:30,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-01-06 16:46:30,645 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:46:30,645 INFO L422 BasicCegarLoop]: trace histogram [15, 1, 1, 1, 1, 1, 1] [2021-01-06 16:46:30,846 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:46:30,846 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:46:30,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:46:30,847 INFO L82 PathProgramCache]: Analyzing trace with hash 814640, now seen corresponding path program 15 times [2021-01-06 16:46:30,847 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:46:30,847 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171036102] [2021-01-06 16:46:30,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:46:30,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:46:31,168 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 16:46:31,168 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171036102] [2021-01-06 16:46:31,168 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [663986407] [2021-01-06 16:46:31,168 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:46:31,273 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-01-06 16:46:31,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:46:31,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 39 conjunts are in the unsatisfiable core [2021-01-06 16:46:31,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:46:31,354 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 16:46:31,354 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:46:31,355 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-01-06 16:46:31,355 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875281363] [2021-01-06 16:46:31,355 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-06 16:46:31,355 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:46:31,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-06 16:46:31,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-01-06 16:46:31,357 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 19 states. [2021-01-06 16:46:31,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:46:31,556 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2021-01-06 16:46:31,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-01-06 16:46:31,556 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 21 [2021-01-06 16:46:31,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:46:31,557 INFO L225 Difference]: With dead ends: 27 [2021-01-06 16:46:31,557 INFO L226 Difference]: Without dead ends: 23 [2021-01-06 16:46:31,558 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-01-06 16:46:31,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-01-06 16:46:31,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2021-01-06 16:46:31,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2021-01-06 16:46:31,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2021-01-06 16:46:31,568 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 21 [2021-01-06 16:46:31,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:46:31,569 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2021-01-06 16:46:31,569 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-06 16:46:31,569 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2021-01-06 16:46:31,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-01-06 16:46:31,571 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:46:31,572 INFO L422 BasicCegarLoop]: trace histogram [16, 1, 1, 1, 1, 1, 1] [2021-01-06 16:46:31,779 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-01-06 16:46:31,780 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:46:31,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:46:31,781 INFO L82 PathProgramCache]: Analyzing trace with hash 26919211, now seen corresponding path program 16 times [2021-01-06 16:46:31,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:46:31,781 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052786563] [2021-01-06 16:46:31,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:46:31,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:46:32,126 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 16:46:32,127 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052786563] [2021-01-06 16:46:32,127 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1441287185] [2021-01-06 16:46:32,127 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 16:46:32,176 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 16:46:32,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:46:32,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 35 conjunts are in the unsatisfiable core [2021-01-06 16:46:32,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:46:32,257 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 16:46:32,257 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:46:32,257 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2021-01-06 16:46:32,261 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198294342] [2021-01-06 16:46:32,262 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-01-06 16:46:32,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:46:32,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-01-06 16:46:32,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2021-01-06 16:46:32,268 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 20 states. [2021-01-06 16:46:32,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:46:32,493 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2021-01-06 16:46:32,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-01-06 16:46:32,493 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 22 [2021-01-06 16:46:32,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:46:32,494 INFO L225 Difference]: With dead ends: 28 [2021-01-06 16:46:32,494 INFO L226 Difference]: Without dead ends: 24 [2021-01-06 16:46:32,495 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2021-01-06 16:46:32,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-01-06 16:46:32,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-01-06 16:46:32,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2021-01-06 16:46:32,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2021-01-06 16:46:32,499 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 22 [2021-01-06 16:46:32,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:46:32,499 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2021-01-06 16:46:32,512 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2021-01-06 16:46:32,512 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2021-01-06 16:46:32,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-01-06 16:46:32,517 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:46:32,518 INFO L422 BasicCegarLoop]: trace histogram [17, 1, 1, 1, 1, 1, 1] [2021-01-06 16:46:32,732 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-01-06 16:46:32,733 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:46:32,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:46:32,734 INFO L82 PathProgramCache]: Analyzing trace with hash 836160912, now seen corresponding path program 17 times [2021-01-06 16:46:32,734 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:46:32,734 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684126962] [2021-01-06 16:46:32,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:46:32,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:46:33,145 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 16:46:33,145 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684126962] [2021-01-06 16:46:33,145 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [105844028] [2021-01-06 16:46:33,145 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:46:34,262 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-01-06 16:46:34,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:46:34,265 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 54 conjunts are in the unsatisfiable core [2021-01-06 16:46:34,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:46:34,626 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 16:46:34,627 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:46:34,627 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2021-01-06 16:46:34,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68653720] [2021-01-06 16:46:34,628 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-06 16:46:34,628 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:46:34,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-06 16:46:34,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-01-06 16:46:34,629 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 21 states. [2021-01-06 16:46:34,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:46:34,885 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2021-01-06 16:46:34,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-01-06 16:46:34,886 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 23 [2021-01-06 16:46:34,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:46:34,887 INFO L225 Difference]: With dead ends: 29 [2021-01-06 16:46:34,887 INFO L226 Difference]: Without dead ends: 25 [2021-01-06 16:46:34,887 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 7 SyntacticMatches, 17 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-01-06 16:46:34,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-01-06 16:46:34,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2021-01-06 16:46:34,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2021-01-06 16:46:34,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2021-01-06 16:46:34,891 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 23 [2021-01-06 16:46:34,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:46:34,891 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2021-01-06 16:46:34,891 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2021-01-06 16:46:34,891 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2021-01-06 16:46:34,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-01-06 16:46:34,892 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:46:34,892 INFO L422 BasicCegarLoop]: trace histogram [18, 1, 1, 1, 1, 1, 1] [2021-01-06 16:46:35,095 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-01-06 16:46:35,096 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:46:35,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:46:35,097 INFO L82 PathProgramCache]: Analyzing trace with hash 152849867, now seen corresponding path program 18 times [2021-01-06 16:46:35,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:46:35,098 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120709199] [2021-01-06 16:46:35,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:46:35,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:46:35,479 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 16:46:35,479 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120709199] [2021-01-06 16:46:35,480 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [328037059] [2021-01-06 16:46:35,480 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:46:35,789 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-01-06 16:46:35,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:46:35,792 WARN L261 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 48 conjunts are in the unsatisfiable core [2021-01-06 16:46:35,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:46:36,073 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 16:46:36,073 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:46:36,074 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-01-06 16:46:36,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291933663] [2021-01-06 16:46:36,076 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-01-06 16:46:36,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:46:36,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-01-06 16:46:36,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2021-01-06 16:46:36,077 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 22 states. [2021-01-06 16:46:36,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:46:36,372 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2021-01-06 16:46:36,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-01-06 16:46:36,373 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 24 [2021-01-06 16:46:36,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:46:36,373 INFO L225 Difference]: With dead ends: 30 [2021-01-06 16:46:36,374 INFO L226 Difference]: Without dead ends: 26 [2021-01-06 16:46:36,374 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 16 SyntacticMatches, 9 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2021-01-06 16:46:36,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-01-06 16:46:36,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2021-01-06 16:46:36,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2021-01-06 16:46:36,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2021-01-06 16:46:36,379 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 24 [2021-01-06 16:46:36,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:46:36,379 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2021-01-06 16:46:36,379 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2021-01-06 16:46:36,379 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2021-01-06 16:46:36,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-01-06 16:46:36,380 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:46:36,380 INFO L422 BasicCegarLoop]: trace histogram [19, 1, 1, 1, 1, 1, 1] [2021-01-06 16:46:36,583 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:46:36,583 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:46:36,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:46:36,585 INFO L82 PathProgramCache]: Analyzing trace with hash 445043952, now seen corresponding path program 19 times [2021-01-06 16:46:36,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:46:36,585 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652445908] [2021-01-06 16:46:36,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:46:36,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:46:37,006 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 16:46:37,007 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652445908] [2021-01-06 16:46:37,007 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [473599250] [2021-01-06 16:46:37,007 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:46:37,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:46:37,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 41 conjunts are in the unsatisfiable core [2021-01-06 16:46:37,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:46:37,120 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 16:46:37,120 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:46:37,120 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2021-01-06 16:46:37,121 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992048753] [2021-01-06 16:46:37,121 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-01-06 16:46:37,121 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:46:37,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-01-06 16:46:37,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2021-01-06 16:46:37,122 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 23 states. [2021-01-06 16:46:37,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:46:37,372 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2021-01-06 16:46:37,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-01-06 16:46:37,372 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 25 [2021-01-06 16:46:37,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:46:37,373 INFO L225 Difference]: With dead ends: 31 [2021-01-06 16:46:37,373 INFO L226 Difference]: Without dead ends: 27 [2021-01-06 16:46:37,374 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2021-01-06 16:46:37,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-01-06 16:46:37,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-01-06 16:46:37,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2021-01-06 16:46:37,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2021-01-06 16:46:37,377 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 25 [2021-01-06 16:46:37,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:46:37,378 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2021-01-06 16:46:37,378 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2021-01-06 16:46:37,378 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2021-01-06 16:46:37,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-01-06 16:46:37,378 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:46:37,379 INFO L422 BasicCegarLoop]: trace histogram [20, 1, 1, 1, 1, 1, 1] [2021-01-06 16:46:37,593 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:46:37,594 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:46:37,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:46:37,595 INFO L82 PathProgramCache]: Analyzing trace with hash 913125995, now seen corresponding path program 20 times [2021-01-06 16:46:37,595 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:46:37,595 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912545703] [2021-01-06 16:46:37,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:46:37,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:46:38,019 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 16:46:38,019 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912545703] [2021-01-06 16:46:38,020 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [346512331] [2021-01-06 16:46:38,020 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:46:38,101 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:46:38,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:46:38,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 43 conjunts are in the unsatisfiable core [2021-01-06 16:46:38,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:46:38,183 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 16:46:38,184 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:46:38,184 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2021-01-06 16:46:38,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116878445] [2021-01-06 16:46:38,185 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-01-06 16:46:38,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:46:38,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-01-06 16:46:38,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2021-01-06 16:46:38,186 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 24 states. [2021-01-06 16:46:38,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:46:38,501 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2021-01-06 16:46:38,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-01-06 16:46:38,501 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 26 [2021-01-06 16:46:38,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:46:38,502 INFO L225 Difference]: With dead ends: 32 [2021-01-06 16:46:38,502 INFO L226 Difference]: Without dead ends: 28 [2021-01-06 16:46:38,502 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2021-01-06 16:46:38,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-01-06 16:46:38,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-01-06 16:46:38,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2021-01-06 16:46:38,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2021-01-06 16:46:38,506 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 26 [2021-01-06 16:46:38,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:46:38,506 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2021-01-06 16:46:38,507 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2021-01-06 16:46:38,507 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2021-01-06 16:46:38,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-01-06 16:46:38,507 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:46:38,507 INFO L422 BasicCegarLoop]: trace histogram [21, 1, 1, 1, 1, 1, 1] [2021-01-06 16:46:38,713 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-01-06 16:46:38,713 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:46:38,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:46:38,714 INFO L82 PathProgramCache]: Analyzing trace with hash -1756199856, now seen corresponding path program 21 times [2021-01-06 16:46:38,714 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:46:38,714 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453969837] [2021-01-06 16:46:38,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:46:38,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:46:39,159 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 16:46:39,160 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453969837] [2021-01-06 16:46:39,160 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [261232390] [2021-01-06 16:46:39,160 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:46:39,484 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-01-06 16:46:39,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:46:39,486 WARN L261 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 54 conjunts are in the unsatisfiable core [2021-01-06 16:46:39,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:46:39,831 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 16:46:39,831 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:46:39,831 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2021-01-06 16:46:39,831 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057286742] [2021-01-06 16:46:39,832 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-01-06 16:46:39,832 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:46:39,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-01-06 16:46:39,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2021-01-06 16:46:39,833 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 25 states. [2021-01-06 16:46:40,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:46:40,186 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2021-01-06 16:46:40,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-01-06 16:46:40,186 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 27 [2021-01-06 16:46:40,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:46:40,187 INFO L225 Difference]: With dead ends: 33 [2021-01-06 16:46:40,187 INFO L226 Difference]: Without dead ends: 29 [2021-01-06 16:46:40,187 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 9 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2021-01-06 16:46:40,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-01-06 16:46:40,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-01-06 16:46:40,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2021-01-06 16:46:40,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2021-01-06 16:46:40,191 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 27 [2021-01-06 16:46:40,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:46:40,191 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2021-01-06 16:46:40,191 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2021-01-06 16:46:40,191 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2021-01-06 16:46:40,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-01-06 16:46:40,192 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:46:40,192 INFO L422 BasicCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1] [2021-01-06 16:46:40,395 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-01-06 16:46:40,396 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:46:40,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:46:40,397 INFO L82 PathProgramCache]: Analyzing trace with hash 1394044683, now seen corresponding path program 22 times [2021-01-06 16:46:40,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:46:40,397 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176142118] [2021-01-06 16:46:40,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:46:40,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:46:40,979 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 16:46:40,980 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176142118] [2021-01-06 16:46:40,980 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2144193940] [2021-01-06 16:46:40,980 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 16:46:41,023 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 16:46:41,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:46:41,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 47 conjunts are in the unsatisfiable core [2021-01-06 16:46:41,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:46:41,104 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 16:46:41,104 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:46:41,104 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2021-01-06 16:46:41,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156206451] [2021-01-06 16:46:41,105 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-01-06 16:46:41,105 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:46:41,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-01-06 16:46:41,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=578, Unknown=0, NotChecked=0, Total=650 [2021-01-06 16:46:41,106 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 26 states. [2021-01-06 16:46:41,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:46:41,486 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2021-01-06 16:46:41,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-01-06 16:46:41,486 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 28 [2021-01-06 16:46:41,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:46:41,487 INFO L225 Difference]: With dead ends: 34 [2021-01-06 16:46:41,487 INFO L226 Difference]: Without dead ends: 30 [2021-01-06 16:46:41,488 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=72, Invalid=578, Unknown=0, NotChecked=0, Total=650 [2021-01-06 16:46:41,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-01-06 16:46:41,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2021-01-06 16:46:41,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2021-01-06 16:46:41,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2021-01-06 16:46:41,493 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 28 [2021-01-06 16:46:41,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:46:41,493 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2021-01-06 16:46:41,494 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2021-01-06 16:46:41,494 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2021-01-06 16:46:41,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-01-06 16:46:41,494 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:46:41,494 INFO L422 BasicCegarLoop]: trace histogram [23, 1, 1, 1, 1, 1, 1] [2021-01-06 16:46:41,707 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:46:41,708 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:46:41,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:46:41,708 INFO L82 PathProgramCache]: Analyzing trace with hash 267377584, now seen corresponding path program 23 times [2021-01-06 16:46:41,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:46:41,709 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324027467] [2021-01-06 16:46:41,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:46:41,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:46:42,295 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 16:46:42,296 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324027467] [2021-01-06 16:46:42,296 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [72854662] [2021-01-06 16:46:42,296 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:46:44,008 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-01-06 16:46:44,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:46:44,011 WARN L261 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 55 conjunts are in the unsatisfiable core [2021-01-06 16:46:44,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:46:44,265 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 16:46:44,265 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:46:44,265 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2021-01-06 16:46:44,265 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326121267] [2021-01-06 16:46:44,265 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-01-06 16:46:44,265 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:46:44,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-01-06 16:46:44,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2021-01-06 16:46:44,267 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 27 states. [2021-01-06 16:46:44,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:46:44,713 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2021-01-06 16:46:44,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-01-06 16:46:44,714 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 29 [2021-01-06 16:46:44,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:46:44,715 INFO L225 Difference]: With dead ends: 35 [2021-01-06 16:46:44,715 INFO L226 Difference]: Without dead ends: 31 [2021-01-06 16:46:44,715 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 23 SyntacticMatches, 7 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2021-01-06 16:46:44,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-01-06 16:46:44,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2021-01-06 16:46:44,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2021-01-06 16:46:44,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2021-01-06 16:46:44,719 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 29 [2021-01-06 16:46:44,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:46:44,720 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2021-01-06 16:46:44,720 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2021-01-06 16:46:44,720 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2021-01-06 16:46:44,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-01-06 16:46:44,720 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:46:44,721 INFO L422 BasicCegarLoop]: trace histogram [24, 1, 1, 1, 1, 1, 1] [2021-01-06 16:46:44,924 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-01-06 16:46:44,925 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:46:44,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:46:44,925 INFO L82 PathProgramCache]: Analyzing trace with hash -299564117, now seen corresponding path program 24 times [2021-01-06 16:46:44,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:46:44,926 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088531327] [2021-01-06 16:46:44,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:46:44,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:46:45,487 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:46:45,488 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088531327] [2021-01-06 16:46:45,489 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1150693463] [2021-01-06 16:46:45,489 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:46:47,286 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-01-06 16:46:47,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:46:47,289 WARN L261 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 60 conjunts are in the unsatisfiable core [2021-01-06 16:46:47,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:46:47,672 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:46:47,672 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:46:47,672 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2021-01-06 16:46:47,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458254981] [2021-01-06 16:46:47,673 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-01-06 16:46:47,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:46:47,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-01-06 16:46:47,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=678, Unknown=0, NotChecked=0, Total=756 [2021-01-06 16:46:47,674 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 28 states. [2021-01-06 16:46:48,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:46:48,138 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2021-01-06 16:46:48,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-01-06 16:46:48,139 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 30 [2021-01-06 16:46:48,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:46:48,139 INFO L225 Difference]: With dead ends: 36 [2021-01-06 16:46:48,139 INFO L226 Difference]: Without dead ends: 32 [2021-01-06 16:46:48,140 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 10 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=78, Invalid=678, Unknown=0, NotChecked=0, Total=756 [2021-01-06 16:46:48,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-01-06 16:46:48,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-01-06 16:46:48,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2021-01-06 16:46:48,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2021-01-06 16:46:48,143 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 30 [2021-01-06 16:46:48,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:46:48,144 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2021-01-06 16:46:48,144 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2021-01-06 16:46:48,144 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2021-01-06 16:46:48,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-01-06 16:46:48,144 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:46:48,144 INFO L422 BasicCegarLoop]: trace histogram [25, 1, 1, 1, 1, 1, 1] [2021-01-06 16:46:48,347 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:46:48,348 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:46:48,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:46:48,349 INFO L82 PathProgramCache]: Analyzing trace with hash -694887664, now seen corresponding path program 25 times [2021-01-06 16:46:48,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:46:48,350 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467554064] [2021-01-06 16:46:48,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:46:48,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:46:49,039 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:46:49,040 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467554064] [2021-01-06 16:46:49,040 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [437453087] [2021-01-06 16:46:49,040 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:46:49,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:46:49,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-01-06 16:46:49,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:46:49,180 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:46:49,181 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:46:49,181 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2021-01-06 16:46:49,181 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024469046] [2021-01-06 16:46:49,182 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-01-06 16:46:49,182 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:46:49,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-01-06 16:46:49,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=731, Unknown=0, NotChecked=0, Total=812 [2021-01-06 16:46:49,183 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 29 states. [2021-01-06 16:46:49,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:46:49,729 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2021-01-06 16:46:49,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-01-06 16:46:49,730 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 31 [2021-01-06 16:46:49,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:46:49,731 INFO L225 Difference]: With dead ends: 37 [2021-01-06 16:46:49,731 INFO L226 Difference]: Without dead ends: 33 [2021-01-06 16:46:49,732 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=81, Invalid=731, Unknown=0, NotChecked=0, Total=812 [2021-01-06 16:46:49,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-01-06 16:46:49,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-01-06 16:46:49,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2021-01-06 16:46:49,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2021-01-06 16:46:49,735 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 31 [2021-01-06 16:46:49,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:46:49,736 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2021-01-06 16:46:49,736 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2021-01-06 16:46:49,736 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2021-01-06 16:46:49,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-01-06 16:46:49,736 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:46:49,736 INFO L422 BasicCegarLoop]: trace histogram [26, 1, 1, 1, 1, 1, 1] [2021-01-06 16:46:49,938 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-01-06 16:46:49,938 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:46:49,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:46:49,939 INFO L82 PathProgramCache]: Analyzing trace with hash -65015733, now seen corresponding path program 26 times [2021-01-06 16:46:49,939 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:46:49,940 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804160066] [2021-01-06 16:46:49,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:46:49,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:46:50,597 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:46:50,598 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804160066] [2021-01-06 16:46:50,598 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671386233] [2021-01-06 16:46:50,598 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:46:50,667 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:46:50,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:46:50,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 55 conjunts are in the unsatisfiable core [2021-01-06 16:46:50,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:46:50,753 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:46:50,754 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:46:50,754 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2021-01-06 16:46:50,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278670285] [2021-01-06 16:46:50,754 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-01-06 16:46:50,754 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:46:50,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-01-06 16:46:50,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=786, Unknown=0, NotChecked=0, Total=870 [2021-01-06 16:46:50,755 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 30 states. [2021-01-06 16:46:51,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:46:51,280 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2021-01-06 16:46:51,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-01-06 16:46:51,280 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 32 [2021-01-06 16:46:51,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:46:51,281 INFO L225 Difference]: With dead ends: 38 [2021-01-06 16:46:51,281 INFO L226 Difference]: Without dead ends: 34 [2021-01-06 16:46:51,282 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=84, Invalid=786, Unknown=0, NotChecked=0, Total=870 [2021-01-06 16:46:51,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-01-06 16:46:51,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2021-01-06 16:46:51,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2021-01-06 16:46:51,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2021-01-06 16:46:51,290 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 32 [2021-01-06 16:46:51,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:46:51,290 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2021-01-06 16:46:51,290 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2021-01-06 16:46:51,290 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2021-01-06 16:46:51,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-01-06 16:46:51,290 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:46:51,291 INFO L422 BasicCegarLoop]: trace histogram [27, 1, 1, 1, 1, 1, 1] [2021-01-06 16:46:51,493 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-01-06 16:46:51,494 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:46:51,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:46:51,495 INFO L82 PathProgramCache]: Analyzing trace with hash -2013822352, now seen corresponding path program 27 times [2021-01-06 16:46:51,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:46:51,495 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238643331] [2021-01-06 16:46:51,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:46:51,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:46:52,281 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:46:52,281 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238643331] [2021-01-06 16:46:52,281 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1459747541] [2021-01-06 16:46:52,281 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 16:46:52,805 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-01-06 16:46:52,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:46:52,807 WARN L261 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 61 conjunts are in the unsatisfiable core [2021-01-06 16:46:52,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:46:53,060 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:46:53,061 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:46:53,061 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2021-01-06 16:46:53,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179881560] [2021-01-06 16:46:53,061 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-01-06 16:46:53,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:46:53,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-01-06 16:46:53,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=843, Unknown=0, NotChecked=0, Total=930 [2021-01-06 16:46:53,063 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand 31 states. [2021-01-06 16:46:53,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:46:53,694 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2021-01-06 16:46:53,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-01-06 16:46:53,695 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 33 [2021-01-06 16:46:53,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:46:53,695 INFO L225 Difference]: With dead ends: 39 [2021-01-06 16:46:53,695 INFO L226 Difference]: Without dead ends: 35 [2021-01-06 16:46:53,696 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=87, Invalid=843, Unknown=0, NotChecked=0, Total=930 [2021-01-06 16:46:53,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-01-06 16:46:53,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-01-06 16:46:53,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2021-01-06 16:46:53,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2021-01-06 16:46:53,701 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 33 [2021-01-06 16:46:53,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:46:53,701 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2021-01-06 16:46:53,701 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2021-01-06 16:46:53,701 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2021-01-06 16:46:53,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-01-06 16:46:53,701 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:46:53,701 INFO L422 BasicCegarLoop]: trace histogram [28, 1, 1, 1, 1, 1, 1] [2021-01-06 16:46:53,902 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-01-06 16:46:53,902 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:46:53,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:46:53,903 INFO L82 PathProgramCache]: Analyzing trace with hash 1997681899, now seen corresponding path program 28 times [2021-01-06 16:46:53,903 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:46:53,903 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594262129] [2021-01-06 16:46:53,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:46:53,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:46:54,672 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:46:54,673 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594262129] [2021-01-06 16:46:54,673 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1903206327] [2021-01-06 16:46:54,673 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 16:46:54,720 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 16:46:54,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:46:54,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 59 conjunts are in the unsatisfiable core [2021-01-06 16:46:54,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:46:54,819 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:46:54,820 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:46:54,820 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2021-01-06 16:46:54,820 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57528774] [2021-01-06 16:46:54,820 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-01-06 16:46:54,821 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:46:54,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-01-06 16:46:54,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=902, Unknown=0, NotChecked=0, Total=992 [2021-01-06 16:46:54,822 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 32 states. [2021-01-06 16:46:55,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:46:55,459 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2021-01-06 16:46:55,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-01-06 16:46:55,459 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 34 [2021-01-06 16:46:55,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:46:55,460 INFO L225 Difference]: With dead ends: 40 [2021-01-06 16:46:55,460 INFO L226 Difference]: Without dead ends: 36 [2021-01-06 16:46:55,461 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=90, Invalid=902, Unknown=0, NotChecked=0, Total=992 [2021-01-06 16:46:55,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-01-06 16:46:55,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2021-01-06 16:46:55,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2021-01-06 16:46:55,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2021-01-06 16:46:55,465 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 34 [2021-01-06 16:46:55,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:46:55,466 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2021-01-06 16:46:55,466 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2021-01-06 16:46:55,466 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2021-01-06 16:46:55,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-01-06 16:46:55,466 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:46:55,466 INFO L422 BasicCegarLoop]: trace histogram [29, 1, 1, 1, 1, 1, 1] [2021-01-06 16:46:55,679 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-01-06 16:46:55,680 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:46:55,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:46:55,680 INFO L82 PathProgramCache]: Analyzing trace with hash 1800262096, now seen corresponding path program 29 times [2021-01-06 16:46:55,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:46:55,681 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491240904] [2021-01-06 16:46:55,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:46:55,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:46:56,447 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:46:56,447 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491240904] [2021-01-06 16:46:56,447 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [768830411] [2021-01-06 16:46:56,447 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 16:47:20,715 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2021-01-06 16:47:20,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:47:20,723 WARN L261 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 88 conjunts are in the unsatisfiable core [2021-01-06 16:47:20,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:47:21,652 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:47:21,653 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:47:21,653 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2021-01-06 16:47:21,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575118469] [2021-01-06 16:47:21,653 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-01-06 16:47:21,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:47:21,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-01-06 16:47:21,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=963, Unknown=0, NotChecked=0, Total=1056 [2021-01-06 16:47:21,655 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand 33 states. [2021-01-06 16:47:22,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:47:22,365 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2021-01-06 16:47:22,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-01-06 16:47:22,365 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 35 [2021-01-06 16:47:22,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:47:22,366 INFO L225 Difference]: With dead ends: 41 [2021-01-06 16:47:22,366 INFO L226 Difference]: Without dead ends: 37 [2021-01-06 16:47:22,367 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 8 SyntacticMatches, 28 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=93, Invalid=963, Unknown=0, NotChecked=0, Total=1056 [2021-01-06 16:47:22,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-01-06 16:47:22,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2021-01-06 16:47:22,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2021-01-06 16:47:22,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2021-01-06 16:47:22,383 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 35 [2021-01-06 16:47:22,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:47:22,384 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2021-01-06 16:47:22,384 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2021-01-06 16:47:22,384 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2021-01-06 16:47:22,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-01-06 16:47:22,384 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:47:22,384 INFO L422 BasicCegarLoop]: trace histogram [30, 1, 1, 1, 1, 1, 1] [2021-01-06 16:47:22,589 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:47:22,589 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:47:22,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:47:22,590 INFO L82 PathProgramCache]: Analyzing trace with hash -24784501, now seen corresponding path program 30 times [2021-01-06 16:47:22,591 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:47:22,591 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51344621] [2021-01-06 16:47:22,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:47:22,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:47:23,432 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:47:23,432 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51344621] [2021-01-06 16:47:23,432 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1337876149] [2021-01-06 16:47:23,432 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:47:24,730 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2021-01-06 16:47:24,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:47:24,733 WARN L261 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 69 conjunts are in the unsatisfiable core [2021-01-06 16:47:24,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:47:24,836 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:47:24,837 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:47:24,837 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2021-01-06 16:47:24,837 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567924374] [2021-01-06 16:47:24,837 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-01-06 16:47:24,837 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:47:24,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-01-06 16:47:24,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=1026, Unknown=0, NotChecked=0, Total=1122 [2021-01-06 16:47:24,838 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 34 states. [2021-01-06 16:47:25,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:47:25,523 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2021-01-06 16:47:25,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-01-06 16:47:25,524 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 36 [2021-01-06 16:47:25,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:47:25,524 INFO L225 Difference]: With dead ends: 42 [2021-01-06 16:47:25,524 INFO L226 Difference]: Without dead ends: 38 [2021-01-06 16:47:25,525 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=96, Invalid=1026, Unknown=0, NotChecked=0, Total=1122 [2021-01-06 16:47:25,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-01-06 16:47:25,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-01-06 16:47:25,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2021-01-06 16:47:25,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2021-01-06 16:47:25,529 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 36 [2021-01-06 16:47:25,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:47:25,530 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2021-01-06 16:47:25,530 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2021-01-06 16:47:25,530 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2021-01-06 16:47:25,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-01-06 16:47:25,530 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:47:25,530 INFO L422 BasicCegarLoop]: trace histogram [31, 1, 1, 1, 1, 1, 1] [2021-01-06 16:47:25,734 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:47:25,734 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:47:25,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:47:25,735 INFO L82 PathProgramCache]: Analyzing trace with hash -766654160, now seen corresponding path program 31 times [2021-01-06 16:47:25,735 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:47:25,735 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943835820] [2021-01-06 16:47:25,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:47:25,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:47:26,637 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:47:26,637 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943835820] [2021-01-06 16:47:26,637 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1070521479] [2021-01-06 16:47:26,637 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:47:26,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:47:26,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 65 conjunts are in the unsatisfiable core [2021-01-06 16:47:26,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:47:26,791 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:47:26,792 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:47:26,792 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2021-01-06 16:47:26,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834013434] [2021-01-06 16:47:26,792 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-01-06 16:47:26,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:47:26,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-01-06 16:47:26,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=1091, Unknown=0, NotChecked=0, Total=1190 [2021-01-06 16:47:26,793 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 35 states. [2021-01-06 16:47:27,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:47:27,567 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2021-01-06 16:47:27,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-01-06 16:47:27,568 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 37 [2021-01-06 16:47:27,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:47:27,569 INFO L225 Difference]: With dead ends: 43 [2021-01-06 16:47:27,569 INFO L226 Difference]: Without dead ends: 39 [2021-01-06 16:47:27,570 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=99, Invalid=1091, Unknown=0, NotChecked=0, Total=1190 [2021-01-06 16:47:27,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-01-06 16:47:27,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2021-01-06 16:47:27,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2021-01-06 16:47:27,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2021-01-06 16:47:27,573 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 37 [2021-01-06 16:47:27,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:47:27,573 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2021-01-06 16:47:27,573 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2021-01-06 16:47:27,574 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2021-01-06 16:47:27,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-01-06 16:47:27,574 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:47:27,574 INFO L422 BasicCegarLoop]: trace histogram [32, 1, 1, 1, 1, 1, 1] [2021-01-06 16:47:27,774 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:47:27,775 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:47:27,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:47:27,775 INFO L82 PathProgramCache]: Analyzing trace with hash 2005190187, now seen corresponding path program 32 times [2021-01-06 16:47:27,776 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:47:27,776 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984998347] [2021-01-06 16:47:27,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:47:27,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:47:28,796 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:47:28,796 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984998347] [2021-01-06 16:47:28,796 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1156408131] [2021-01-06 16:47:28,796 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:47:28,866 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:47:28,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:47:28,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 67 conjunts are in the unsatisfiable core [2021-01-06 16:47:28,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:47:28,997 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:47:28,997 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:47:28,997 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2021-01-06 16:47:28,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434132688] [2021-01-06 16:47:28,998 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-01-06 16:47:28,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:47:28,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-01-06 16:47:28,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=1158, Unknown=0, NotChecked=0, Total=1260 [2021-01-06 16:47:28,999 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 36 states. [2021-01-06 16:47:29,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:47:29,801 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2021-01-06 16:47:29,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-01-06 16:47:29,802 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 38 [2021-01-06 16:47:29,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:47:29,802 INFO L225 Difference]: With dead ends: 44 [2021-01-06 16:47:29,802 INFO L226 Difference]: Without dead ends: 40 [2021-01-06 16:47:29,804 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=102, Invalid=1158, Unknown=0, NotChecked=0, Total=1260 [2021-01-06 16:47:29,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-01-06 16:47:29,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2021-01-06 16:47:29,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2021-01-06 16:47:29,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2021-01-06 16:47:29,807 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 38 [2021-01-06 16:47:29,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:47:29,808 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2021-01-06 16:47:29,808 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2021-01-06 16:47:29,808 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2021-01-06 16:47:29,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-01-06 16:47:29,808 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:47:29,808 INFO L422 BasicCegarLoop]: trace histogram [33, 1, 1, 1, 1, 1, 1] [2021-01-06 16:47:30,011 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-01-06 16:47:30,012 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:47:30,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:47:30,012 INFO L82 PathProgramCache]: Analyzing trace with hash 2033019024, now seen corresponding path program 33 times [2021-01-06 16:47:30,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:47:30,013 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325965813] [2021-01-06 16:47:30,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:47:30,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:47:31,126 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:47:31,126 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325965813] [2021-01-06 16:47:31,126 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1451893974] [2021-01-06 16:47:31,126 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:47:31,700 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2021-01-06 16:47:31,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:47:31,702 WARN L261 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 78 conjunts are in the unsatisfiable core [2021-01-06 16:47:31,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:47:31,951 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:47:31,951 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:47:31,951 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2021-01-06 16:47:31,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611315666] [2021-01-06 16:47:31,951 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-01-06 16:47:31,951 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:47:31,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-01-06 16:47:31,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1227, Unknown=0, NotChecked=0, Total=1332 [2021-01-06 16:47:31,952 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand 37 states. [2021-01-06 16:47:32,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:47:32,844 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2021-01-06 16:47:32,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-01-06 16:47:32,845 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 39 [2021-01-06 16:47:32,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:47:32,846 INFO L225 Difference]: With dead ends: 45 [2021-01-06 16:47:32,846 INFO L226 Difference]: Without dead ends: 41 [2021-01-06 16:47:32,846 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 36 SyntacticMatches, 4 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=105, Invalid=1227, Unknown=0, NotChecked=0, Total=1332 [2021-01-06 16:47:32,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-01-06 16:47:32,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2021-01-06 16:47:32,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2021-01-06 16:47:32,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2021-01-06 16:47:32,848 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 39 [2021-01-06 16:47:32,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:47:32,848 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2021-01-06 16:47:32,849 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2021-01-06 16:47:32,849 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2021-01-06 16:47:32,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-01-06 16:47:32,849 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:47:32,849 INFO L422 BasicCegarLoop]: trace histogram [34, 1, 1, 1, 1, 1, 1] [2021-01-06 16:47:33,049 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:47:33,050 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:47:33,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:47:33,051 INFO L82 PathProgramCache]: Analyzing trace with hash -1399254325, now seen corresponding path program 34 times [2021-01-06 16:47:33,052 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:47:33,052 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120676278] [2021-01-06 16:47:33,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:47:33,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:47:34,103 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:47:34,104 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120676278] [2021-01-06 16:47:34,104 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1424823255] [2021-01-06 16:47:34,104 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:47:34,151 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 16:47:34,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:47:34,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 71 conjunts are in the unsatisfiable core [2021-01-06 16:47:34,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:47:34,269 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:47:34,269 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:47:34,269 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2021-01-06 16:47:34,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076120969] [2021-01-06 16:47:34,270 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-01-06 16:47:34,270 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:47:34,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-01-06 16:47:34,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1298, Unknown=0, NotChecked=0, Total=1406 [2021-01-06 16:47:34,271 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 38 states. [2021-01-06 16:47:35,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:47:35,199 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2021-01-06 16:47:35,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-01-06 16:47:35,199 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 40 [2021-01-06 16:47:35,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:47:35,200 INFO L225 Difference]: With dead ends: 46 [2021-01-06 16:47:35,200 INFO L226 Difference]: Without dead ends: 42 [2021-01-06 16:47:35,201 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=108, Invalid=1298, Unknown=0, NotChecked=0, Total=1406 [2021-01-06 16:47:35,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-01-06 16:47:35,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2021-01-06 16:47:35,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2021-01-06 16:47:35,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2021-01-06 16:47:35,204 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 40 [2021-01-06 16:47:35,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:47:35,204 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2021-01-06 16:47:35,204 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2021-01-06 16:47:35,204 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2021-01-06 16:47:35,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-01-06 16:47:35,205 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:47:35,205 INFO L422 BasicCegarLoop]: trace histogram [35, 1, 1, 1, 1, 1, 1] [2021-01-06 16:47:35,419 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-01-06 16:47:35,420 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:47:35,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:47:35,420 INFO L82 PathProgramCache]: Analyzing trace with hash -425545744, now seen corresponding path program 35 times [2021-01-06 16:47:35,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:47:35,421 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754310374] [2021-01-06 16:47:35,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:47:35,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:47:36,575 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:47:36,575 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754310374] [2021-01-06 16:47:36,575 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [380782877] [2021-01-06 16:47:36,575 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:48:42,723 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2021-01-06 16:48:42,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:48:42,741 WARN L261 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 101 conjunts are in the unsatisfiable core [2021-01-06 16:48:42,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:48:43,910 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:48:43,910 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:48:43,911 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 39 [2021-01-06 16:48:43,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533384121] [2021-01-06 16:48:43,911 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-01-06 16:48:43,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:48:43,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-01-06 16:48:43,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1371, Unknown=0, NotChecked=0, Total=1482 [2021-01-06 16:48:43,912 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand 39 states. [2021-01-06 16:48:44,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:48:44,930 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2021-01-06 16:48:44,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-01-06 16:48:44,931 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 41 [2021-01-06 16:48:44,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:48:44,931 INFO L225 Difference]: With dead ends: 47 [2021-01-06 16:48:44,932 INFO L226 Difference]: Without dead ends: 43 [2021-01-06 16:48:44,933 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 14 SyntacticMatches, 28 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=111, Invalid=1371, Unknown=0, NotChecked=0, Total=1482 [2021-01-06 16:48:44,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-01-06 16:48:44,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2021-01-06 16:48:44,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2021-01-06 16:48:44,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2021-01-06 16:48:44,936 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 41 [2021-01-06 16:48:44,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:48:44,936 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2021-01-06 16:48:44,936 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2021-01-06 16:48:44,937 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2021-01-06 16:48:44,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-01-06 16:48:44,937 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:48:44,937 INFO L422 BasicCegarLoop]: trace histogram [36, 1, 1, 1, 1, 1, 1] [2021-01-06 16:48:45,143 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:48:45,144 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:48:45,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:48:45,145 INFO L82 PathProgramCache]: Analyzing trace with hash -305350805, now seen corresponding path program 36 times [2021-01-06 16:48:45,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:48:45,145 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470700328] [2021-01-06 16:48:45,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:48:45,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:48:46,450 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:48:46,450 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470700328] [2021-01-06 16:48:46,450 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1817384964] [2021-01-06 16:48:46,450 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 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 16:48:51,548 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2021-01-06 16:48:51,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:48:51,554 WARN L261 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 103 conjunts are in the unsatisfiable core [2021-01-06 16:48:51,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:48:52,868 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:48:52,869 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:48:52,869 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 40 [2021-01-06 16:48:52,869 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224142834] [2021-01-06 16:48:52,869 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-01-06 16:48:52,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:48:52,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-01-06 16:48:52,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=1446, Unknown=0, NotChecked=0, Total=1560 [2021-01-06 16:48:52,871 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 40 states. [2021-01-06 16:48:53,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:48:53,961 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2021-01-06 16:48:53,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-01-06 16:48:53,962 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 42 [2021-01-06 16:48:53,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:48:53,963 INFO L225 Difference]: With dead ends: 48 [2021-01-06 16:48:53,963 INFO L226 Difference]: Without dead ends: 44 [2021-01-06 16:48:53,964 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 15 SyntacticMatches, 28 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=114, Invalid=1446, Unknown=0, NotChecked=0, Total=1560 [2021-01-06 16:48:53,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-01-06 16:48:53,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2021-01-06 16:48:53,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2021-01-06 16:48:53,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2021-01-06 16:48:53,966 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 42 [2021-01-06 16:48:53,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:48:53,967 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2021-01-06 16:48:53,967 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2021-01-06 16:48:53,967 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2021-01-06 16:48:53,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-01-06 16:48:53,967 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:48:53,967 INFO L422 BasicCegarLoop]: trace histogram [37, 1, 1, 1, 1, 1, 1] [2021-01-06 16:48:54,168 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-01-06 16:48:54,168 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:48:54,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:48:54,169 INFO L82 PathProgramCache]: Analyzing trace with hash -874274992, now seen corresponding path program 37 times [2021-01-06 16:48:54,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:48:54,169 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612394014] [2021-01-06 16:48:54,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:48:54,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:48:55,453 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:48:55,453 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612394014] [2021-01-06 16:48:55,453 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [567913301] [2021-01-06 16:48:55,454 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 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 16:48:55,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:48:55,512 WARN L261 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 77 conjunts are in the unsatisfiable core [2021-01-06 16:48:55,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:48:55,630 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:48:55,630 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:48:55,630 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 41 [2021-01-06 16:48:55,630 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150822649] [2021-01-06 16:48:55,631 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-01-06 16:48:55,631 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:48:55,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-01-06 16:48:55,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1523, Unknown=0, NotChecked=0, Total=1640 [2021-01-06 16:48:55,632 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand 41 states. [2021-01-06 16:48:56,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:48:56,563 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2021-01-06 16:48:56,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-01-06 16:48:56,564 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 43 [2021-01-06 16:48:56,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:48:56,564 INFO L225 Difference]: With dead ends: 49 [2021-01-06 16:48:56,564 INFO L226 Difference]: Without dead ends: 45 [2021-01-06 16:48:56,565 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=117, Invalid=1523, Unknown=0, NotChecked=0, Total=1640 [2021-01-06 16:48:56,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-01-06 16:48:56,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2021-01-06 16:48:56,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2021-01-06 16:48:56,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2021-01-06 16:48:56,568 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 43 [2021-01-06 16:48:56,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:48:56,568 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2021-01-06 16:48:56,568 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2021-01-06 16:48:56,568 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2021-01-06 16:48:56,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-01-06 16:48:56,569 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:48:56,569 INFO L422 BasicCegarLoop]: trace histogram [38, 1, 1, 1, 1, 1, 1] [2021-01-06 16:48:56,782 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-01-06 16:48:56,782 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:48:56,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:48:56,783 INFO L82 PathProgramCache]: Analyzing trace with hash -1331055605, now seen corresponding path program 38 times [2021-01-06 16:48:56,784 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:48:56,784 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276331818] [2021-01-06 16:48:56,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:48:56,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:48:58,217 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:48:58,218 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276331818] [2021-01-06 16:48:58,218 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [781986805] [2021-01-06 16:48:58,218 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 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 16:48:58,290 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:48:58,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:48:58,291 WARN L261 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 79 conjunts are in the unsatisfiable core [2021-01-06 16:48:58,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:48:58,437 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:48:58,438 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:48:58,438 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 42 [2021-01-06 16:48:58,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611911523] [2021-01-06 16:48:58,438 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-01-06 16:48:58,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:48:58,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-01-06 16:48:58,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1602, Unknown=0, NotChecked=0, Total=1722 [2021-01-06 16:48:58,439 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand 42 states. [2021-01-06 16:48:59,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:48:59,570 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2021-01-06 16:48:59,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-01-06 16:48:59,570 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 44 [2021-01-06 16:48:59,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:48:59,571 INFO L225 Difference]: With dead ends: 50 [2021-01-06 16:48:59,571 INFO L226 Difference]: Without dead ends: 46 [2021-01-06 16:48:59,572 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=120, Invalid=1602, Unknown=0, NotChecked=0, Total=1722 [2021-01-06 16:48:59,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-01-06 16:48:59,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2021-01-06 16:48:59,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2021-01-06 16:48:59,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions. [2021-01-06 16:48:59,578 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 44 [2021-01-06 16:48:59,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:48:59,578 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions. [2021-01-06 16:48:59,578 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2021-01-06 16:48:59,578 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions. [2021-01-06 16:48:59,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-01-06 16:48:59,578 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:48:59,579 INFO L422 BasicCegarLoop]: trace histogram [39, 1, 1, 1, 1, 1, 1] [2021-01-06 16:48:59,780 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-01-06 16:48:59,781 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:48:59,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:48:59,781 INFO L82 PathProgramCache]: Analyzing trace with hash 1688614576, now seen corresponding path program 39 times [2021-01-06 16:48:59,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:48:59,782 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89388976] [2021-01-06 16:48:59,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:48:59,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:49:01,301 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:49:01,301 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89388976] [2021-01-06 16:49:01,301 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [192154170] [2021-01-06 16:49:01,301 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 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 16:49:02,323 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2021-01-06 16:49:02,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:49:02,327 WARN L261 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 89 conjunts are in the unsatisfiable core [2021-01-06 16:49:02,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:49:02,952 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:49:02,952 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:49:02,952 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 43 [2021-01-06 16:49:02,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053736435] [2021-01-06 16:49:02,952 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-01-06 16:49:02,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:49:02,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-01-06 16:49:02,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=1683, Unknown=0, NotChecked=0, Total=1806 [2021-01-06 16:49:02,953 INFO L87 Difference]: Start difference. First operand 46 states and 46 transitions. Second operand 43 states. [2021-01-06 16:49:04,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:49:04,217 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2021-01-06 16:49:04,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-01-06 16:49:04,218 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 45 [2021-01-06 16:49:04,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:49:04,219 INFO L225 Difference]: With dead ends: 51 [2021-01-06 16:49:04,219 INFO L226 Difference]: Without dead ends: 47 [2021-01-06 16:49:04,219 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 38 SyntacticMatches, 8 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=123, Invalid=1683, Unknown=0, NotChecked=0, Total=1806 [2021-01-06 16:49:04,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-01-06 16:49:04,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2021-01-06 16:49:04,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2021-01-06 16:49:04,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2021-01-06 16:49:04,221 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 45 [2021-01-06 16:49:04,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:49:04,222 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2021-01-06 16:49:04,222 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2021-01-06 16:49:04,222 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2021-01-06 16:49:04,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-01-06 16:49:04,222 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:49:04,222 INFO L422 BasicCegarLoop]: trace histogram [40, 1, 1, 1, 1, 1, 1] [2021-01-06 16:49:04,423 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-01-06 16:49:04,423 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:49:04,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:49:04,424 INFO L82 PathProgramCache]: Analyzing trace with hash 809109675, now seen corresponding path program 40 times [2021-01-06 16:49:04,424 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:49:04,424 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206688906] [2021-01-06 16:49:04,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:49:04,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:49:05,963 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:49:05,963 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206688906] [2021-01-06 16:49:05,963 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [5458511] [2021-01-06 16:49:05,963 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 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 16:49:06,021 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 16:49:06,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:49:06,022 WARN L261 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 83 conjunts are in the unsatisfiable core [2021-01-06 16:49:06,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:49:06,167 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:49:06,167 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:49:06,167 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 44 [2021-01-06 16:49:06,168 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440170756] [2021-01-06 16:49:06,168 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2021-01-06 16:49:06,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:49:06,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-01-06 16:49:06,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=1766, Unknown=0, NotChecked=0, Total=1892 [2021-01-06 16:49:06,169 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 44 states. [2021-01-06 16:49:07,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:49:07,409 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2021-01-06 16:49:07,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-01-06 16:49:07,410 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 46 [2021-01-06 16:49:07,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:49:07,411 INFO L225 Difference]: With dead ends: 52 [2021-01-06 16:49:07,411 INFO L226 Difference]: Without dead ends: 48 [2021-01-06 16:49:07,412 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=126, Invalid=1766, Unknown=0, NotChecked=0, Total=1892 [2021-01-06 16:49:07,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-01-06 16:49:07,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2021-01-06 16:49:07,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2021-01-06 16:49:07,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2021-01-06 16:49:07,415 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 46 [2021-01-06 16:49:07,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:49:07,416 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2021-01-06 16:49:07,416 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2021-01-06 16:49:07,416 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2021-01-06 16:49:07,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-01-06 16:49:07,416 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:49:07,416 INFO L422 BasicCegarLoop]: trace histogram [41, 1, 1, 1, 1, 1, 1] [2021-01-06 16:49:07,619 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:49:07,619 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:49:07,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:49:07,620 INFO L82 PathProgramCache]: Analyzing trace with hash -685738480, now seen corresponding path program 41 times [2021-01-06 16:49:07,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:49:07,621 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696314241] [2021-01-06 16:49:07,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:49:07,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:49:09,228 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:49:09,228 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696314241] [2021-01-06 16:49:09,228 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2055893744] [2021-01-06 16:49:09,228 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 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 16:50:23,747 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2021-01-06 16:50:23,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:50:23,769 WARN L261 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 123 conjunts are in the unsatisfiable core [2021-01-06 16:50:23,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:50:25,422 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:50:25,422 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:50:25,422 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 45 [2021-01-06 16:50:25,422 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388326209] [2021-01-06 16:50:25,422 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2021-01-06 16:50:25,422 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:50:25,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-01-06 16:50:25,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=1851, Unknown=0, NotChecked=0, Total=1980 [2021-01-06 16:50:25,423 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand 45 states. [2021-01-06 16:50:26,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:50:26,835 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2021-01-06 16:50:26,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-01-06 16:50:26,836 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 47 [2021-01-06 16:50:26,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:50:26,837 INFO L225 Difference]: With dead ends: 53 [2021-01-06 16:50:26,837 INFO L226 Difference]: Without dead ends: 49 [2021-01-06 16:50:26,837 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 9 SyntacticMatches, 39 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=129, Invalid=1851, Unknown=0, NotChecked=0, Total=1980 [2021-01-06 16:50:26,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-01-06 16:50:26,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2021-01-06 16:50:26,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2021-01-06 16:50:26,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2021-01-06 16:50:26,840 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 47 [2021-01-06 16:50:26,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:50:26,840 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2021-01-06 16:50:26,840 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2021-01-06 16:50:26,840 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2021-01-06 16:50:26,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-01-06 16:50:26,841 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:50:26,841 INFO L422 BasicCegarLoop]: trace histogram [42, 1, 1, 1, 1, 1, 1] [2021-01-06 16:50:27,041 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-01-06 16:50:27,042 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:50:27,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:50:27,042 INFO L82 PathProgramCache]: Analyzing trace with hash 218608971, now seen corresponding path program 42 times [2021-01-06 16:50:27,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:50:27,043 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091696623] [2021-01-06 16:50:27,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:50:27,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:50:28,651 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:50:28,651 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091696623] [2021-01-06 16:50:28,651 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1960560675] [2021-01-06 16:50:28,652 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 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 16:50:50,129 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2021-01-06 16:50:50,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:50:50,137 WARN L261 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 93 conjunts are in the unsatisfiable core [2021-01-06 16:50:50,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:50:50,268 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:50:50,268 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:50:50,268 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 46 [2021-01-06 16:50:50,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911125749] [2021-01-06 16:50:50,269 INFO L461 AbstractCegarLoop]: Interpolant automaton has 46 states [2021-01-06 16:50:50,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:50:50,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-01-06 16:50:50,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=1938, Unknown=0, NotChecked=0, Total=2070 [2021-01-06 16:50:50,270 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand 46 states. [2021-01-06 16:50:51,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:50:51,735 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2021-01-06 16:50:51,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-01-06 16:50:51,736 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 48 [2021-01-06 16:50:51,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:50:51,737 INFO L225 Difference]: With dead ends: 54 [2021-01-06 16:50:51,737 INFO L226 Difference]: Without dead ends: 50 [2021-01-06 16:50:51,738 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=132, Invalid=1938, Unknown=0, NotChecked=0, Total=2070 [2021-01-06 16:50:51,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-01-06 16:50:51,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2021-01-06 16:50:51,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2021-01-06 16:50:51,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 50 transitions. [2021-01-06 16:50:51,741 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 50 transitions. Word has length 48 [2021-01-06 16:50:51,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:50:51,741 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 50 transitions. [2021-01-06 16:50:51,741 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2021-01-06 16:50:51,741 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 50 transitions. [2021-01-06 16:50:51,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-01-06 16:50:51,742 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:50:51,742 INFO L422 BasicCegarLoop]: trace histogram [43, 1, 1, 1, 1, 1, 1] [2021-01-06 16:50:51,948 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:50:51,949 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:50:51,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:50:51,949 INFO L82 PathProgramCache]: Analyzing trace with hash -1811391120, now seen corresponding path program 43 times [2021-01-06 16:50:51,950 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:50:51,950 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784275489] [2021-01-06 16:50:51,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:50:51,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat