/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/diamond_1-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-06 16:43:28,522 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 16:43:28,525 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 16:43:28,560 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-06 16:43:28,561 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-06 16:43:28,562 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-06 16:43:28,564 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-06 16:43:28,567 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-06 16:43:28,569 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-06 16:43:28,570 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-06 16:43:28,572 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-06 16:43:28,573 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-06 16:43:28,574 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-06 16:43:28,575 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-06 16:43:28,576 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-06 16:43:28,577 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-06 16:43:28,592 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-06 16:43:28,595 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-06 16:43:28,597 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-06 16:43:28,604 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-06 16:43:28,606 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-06 16:43:28,613 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-06 16:43:28,615 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-06 16:43:28,616 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-06 16:43:28,626 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-01-06 16:43:28,637 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-01-06 16:43:28,638 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-01-06 16:43:28,639 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-01-06 16:43:28,639 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-01-06 16:43:28,641 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-01-06 16:43:28,641 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-01-06 16:43:28,643 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-01-06 16:43:28,643 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-01-06 16:43:28,647 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 16:43:28,649 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 16:43:28,650 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 16:43:28,654 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 16:43:28,705 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 16:43:28,705 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 16:43:28,707 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 16:43:28,707 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 16:43:28,708 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 16:43:28,708 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 16:43:28,708 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 16:43:28,708 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 16:43:28,709 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 16:43:28,709 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 16:43:28,709 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 16:43:28,709 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 16:43:28,710 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 16:43:28,710 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 16:43:28,710 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 16:43:28,710 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 16:43:28,711 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 16:43:28,711 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 16:43:28,711 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 16:43:28,711 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 16:43:28,712 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 16:43:28,712 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 16:43:28,712 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 16:43:28,712 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 16:43:28,712 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 16:43:28,713 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 16:43:29,112 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 16:43:29,162 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 16:43:29,166 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 16:43:29,167 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 16:43:29,168 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 16:43:29,169 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-acceleration/diamond_1-2.c [2021-01-06 16:43:29,270 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/79d327e2f/95ed2287772e48d18204a08cd94c6350/FLAG678095cda [2021-01-06 16:43:29,908 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 16:43:29,908 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/loop-acceleration/diamond_1-2.c [2021-01-06 16:43:29,916 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/79d327e2f/95ed2287772e48d18204a08cd94c6350/FLAG678095cda [2021-01-06 16:43:30,278 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/79d327e2f/95ed2287772e48d18204a08cd94c6350 [2021-01-06 16:43:30,281 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 16:43:30,283 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 16:43:30,285 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 16:43:30,285 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 16:43:30,294 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 16:43:30,295 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 04:43:30" (1/1) ... [2021-01-06 16:43:30,297 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3bdd9e98 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:43:30, skipping insertion in model container [2021-01-06 16:43:30,297 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 04:43:30" (1/1) ... [2021-01-06 16:43:30,308 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 16:43:30,339 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-01-06 16:43:30,477 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/diamond_1-2.c[373,386] [2021-01-06 16:43:30,492 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 16:43:30,504 INFO L203 MainTranslator]: Completed pre-run [2021-01-06 16:43:30,519 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/diamond_1-2.c[373,386] [2021-01-06 16:43:30,523 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 16:43:30,546 INFO L208 MainTranslator]: Completed translation [2021-01-06 16:43:30,546 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:43:30 WrapperNode [2021-01-06 16:43:30,546 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 16:43:30,548 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 16:43:30,548 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 16:43:30,548 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 16:43:30,558 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:43:30" (1/1) ... [2021-01-06 16:43:30,567 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:43:30" (1/1) ... [2021-01-06 16:43:30,590 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 16:43:30,591 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 16:43:30,591 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 16:43:30,591 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 16:43:30,602 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:43:30" (1/1) ... [2021-01-06 16:43:30,602 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:43:30" (1/1) ... [2021-01-06 16:43:30,604 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:43:30" (1/1) ... [2021-01-06 16:43:30,604 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:43:30" (1/1) ... [2021-01-06 16:43:30,608 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:43:30" (1/1) ... [2021-01-06 16:43:30,613 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:43:30" (1/1) ... [2021-01-06 16:43:30,614 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:43:30" (1/1) ... [2021-01-06 16:43:30,620 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 16:43:30,621 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 16:43:30,621 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 16:43:30,621 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 16:43:30,622 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:43:30" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 16:43:30,737 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 16:43:30,737 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 16:43:30,737 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 16:43:30,737 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 16:43:31,017 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 16:43:31,017 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-01-06 16:43:31,020 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 04:43:31 BoogieIcfgContainer [2021-01-06 16:43:31,020 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 16:43:31,022 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 16:43:31,023 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 16:43:31,027 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 16:43:31,028 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 04:43:30" (1/3) ... [2021-01-06 16:43:31,029 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60edace9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 04:43:31, skipping insertion in model container [2021-01-06 16:43:31,029 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:43:30" (2/3) ... [2021-01-06 16:43:31,030 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60edace9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 04:43:31, skipping insertion in model container [2021-01-06 16:43:31,030 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 04:43:31" (3/3) ... [2021-01-06 16:43:31,032 INFO L111 eAbstractionObserver]: Analyzing ICFG diamond_1-2.c [2021-01-06 16:43:31,042 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 16:43:31,048 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-01-06 16:43:31,070 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-01-06 16:43:31,128 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 16:43:31,128 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 16:43:31,128 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 16:43:31,129 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 16:43:31,129 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 16:43:31,129 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 16:43:31,129 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 16:43:31,130 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 16:43:31,145 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states. [2021-01-06 16:43:31,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-01-06 16:43:31,151 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:43:31,152 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-01-06 16:43:31,153 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:43:31,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:43:31,160 INFO L82 PathProgramCache]: Analyzing trace with hash 889937703, now seen corresponding path program 1 times [2021-01-06 16:43:31,171 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:43:31,171 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441219253] [2021-01-06 16:43:31,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:43:31,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:43:31,336 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:43:31,338 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441219253] [2021-01-06 16:43:31,339 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 16:43:31,339 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-01-06 16:43:31,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787468124] [2021-01-06 16:43:31,346 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-01-06 16:43:31,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:43:31,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-01-06 16:43:31,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-01-06 16:43:31,366 INFO L87 Difference]: Start difference. First operand 11 states. Second operand 2 states. [2021-01-06 16:43:31,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:43:31,386 INFO L93 Difference]: Finished difference Result 18 states and 21 transitions. [2021-01-06 16:43:31,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-01-06 16:43:31,388 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 6 [2021-01-06 16:43:31,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:43:31,399 INFO L225 Difference]: With dead ends: 18 [2021-01-06 16:43:31,400 INFO L226 Difference]: Without dead ends: 8 [2021-01-06 16:43:31,403 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-01-06 16:43:31,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2021-01-06 16:43:31,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2021-01-06 16:43:31,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-01-06 16:43:31,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 9 transitions. [2021-01-06 16:43:31,442 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 9 transitions. Word has length 6 [2021-01-06 16:43:31,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:43:31,443 INFO L481 AbstractCegarLoop]: Abstraction has 8 states and 9 transitions. [2021-01-06 16:43:31,443 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2021-01-06 16:43:31,443 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 9 transitions. [2021-01-06 16:43:31,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-01-06 16:43:31,444 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:43:31,444 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-01-06 16:43:31,445 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-06 16:43:31,445 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:43:31,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:43:31,446 INFO L82 PathProgramCache]: Analyzing trace with hash 889639793, now seen corresponding path program 1 times [2021-01-06 16:43:31,446 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:43:31,447 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230944424] [2021-01-06 16:43:31,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:43:31,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:43:31,548 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 16:43:31,548 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230944424] [2021-01-06 16:43:31,549 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 16:43:31,549 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 16:43:31,549 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683754637] [2021-01-06 16:43:31,552 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 16:43:31,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:43:31,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 16:43:31,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 16:43:31,558 INFO L87 Difference]: Start difference. First operand 8 states and 9 transitions. Second operand 3 states. [2021-01-06 16:43:31,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:43:31,633 INFO L93 Difference]: Finished difference Result 14 states and 16 transitions. [2021-01-06 16:43:31,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 16:43:31,634 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 6 [2021-01-06 16:43:31,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:43:31,639 INFO L225 Difference]: With dead ends: 14 [2021-01-06 16:43:31,640 INFO L226 Difference]: Without dead ends: 10 [2021-01-06 16:43:31,641 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 1 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 16:43:31,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2021-01-06 16:43:31,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 9. [2021-01-06 16:43:31,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-01-06 16:43:31,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2021-01-06 16:43:31,646 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 6 [2021-01-06 16:43:31,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:43:31,647 INFO L481 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2021-01-06 16:43:31,647 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 16:43:31,647 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2021-01-06 16:43:31,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-01-06 16:43:31,648 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:43:31,648 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:43:31,648 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-01-06 16:43:31,649 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:43:31,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:43:31,650 INFO L82 PathProgramCache]: Analyzing trace with hash 297538966, now seen corresponding path program 1 times [2021-01-06 16:43:31,650 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:43:31,650 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547241415] [2021-01-06 16:43:31,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:43:31,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:43:31,769 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 16:43:31,770 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547241415] [2021-01-06 16:43:31,770 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1528644548] [2021-01-06 16:43:31,770 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 16:43:31,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:43:31,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 5 conjunts are in the unsatisfiable core [2021-01-06 16:43:31,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:43:31,926 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 16:43:31,927 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:43:31,927 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-01-06 16:43:31,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681569989] [2021-01-06 16:43:31,928 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 16:43:31,929 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:43:31,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 16:43:31,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-01-06 16:43:31,930 INFO L87 Difference]: Start difference. First operand 9 states and 10 transitions. Second operand 5 states. [2021-01-06 16:43:32,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:43:32,002 INFO L93 Difference]: Finished difference Result 18 states and 23 transitions. [2021-01-06 16:43:32,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 16:43:32,003 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2021-01-06 16:43:32,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:43:32,004 INFO L225 Difference]: With dead ends: 18 [2021-01-06 16:43:32,004 INFO L226 Difference]: Without dead ends: 14 [2021-01-06 16:43:32,005 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-01-06 16:43:32,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2021-01-06 16:43:32,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 11. [2021-01-06 16:43:32,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2021-01-06 16:43:32,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 13 transitions. [2021-01-06 16:43:32,010 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 13 transitions. Word has length 8 [2021-01-06 16:43:32,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:43:32,010 INFO L481 AbstractCegarLoop]: Abstraction has 11 states and 13 transitions. [2021-01-06 16:43:32,010 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 16:43:32,011 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 13 transitions. [2021-01-06 16:43:32,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-01-06 16:43:32,011 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:43:32,012 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2021-01-06 16:43:32,227 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-01-06 16:43:32,228 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:43:32,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:43:32,230 INFO L82 PathProgramCache]: Analyzing trace with hash -1775672709, now seen corresponding path program 2 times [2021-01-06 16:43:32,231 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:43:32,231 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479482212] [2021-01-06 16:43:32,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:43:32,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:43:32,410 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:43:32,410 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479482212] [2021-01-06 16:43:32,410 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1901582423] [2021-01-06 16:43:32,411 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 16:43:32,481 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:43:32,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:43:32,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 7 conjunts are in the unsatisfiable core [2021-01-06 16:43:32,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:43:32,583 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:43:32,583 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:43:32,583 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-01-06 16:43:32,584 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818583974] [2021-01-06 16:43:32,584 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-06 16:43:32,585 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:43:32,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-06 16:43:32,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-01-06 16:43:32,586 INFO L87 Difference]: Start difference. First operand 11 states and 13 transitions. Second operand 6 states. [2021-01-06 16:43:32,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:43:32,676 INFO L93 Difference]: Finished difference Result 21 states and 27 transitions. [2021-01-06 16:43:32,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 16:43:32,677 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2021-01-06 16:43:32,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:43:32,678 INFO L225 Difference]: With dead ends: 21 [2021-01-06 16:43:32,678 INFO L226 Difference]: Without dead ends: 17 [2021-01-06 16:43:32,679 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-01-06 16:43:32,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-01-06 16:43:32,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 13. [2021-01-06 16:43:32,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2021-01-06 16:43:32,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 16 transitions. [2021-01-06 16:43:32,684 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 16 transitions. Word has length 10 [2021-01-06 16:43:32,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:43:32,684 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 16 transitions. [2021-01-06 16:43:32,684 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-06 16:43:32,685 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 16 transitions. [2021-01-06 16:43:32,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-01-06 16:43:32,685 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:43:32,685 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:43:32,900 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:43:32,901 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:43:32,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:43:32,903 INFO L82 PathProgramCache]: Analyzing trace with hash 744287225, now seen corresponding path program 1 times [2021-01-06 16:43:32,904 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:43:32,904 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869944220] [2021-01-06 16:43:32,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:43:32,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:43:32,942 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:43:32,942 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869944220] [2021-01-06 16:43:32,943 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 16:43:32,943 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 16:43:32,943 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729043899] [2021-01-06 16:43:32,944 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 16:43:32,944 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:43:32,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 16:43:32,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 16:43:32,945 INFO L87 Difference]: Start difference. First operand 13 states and 16 transitions. Second operand 3 states. [2021-01-06 16:43:32,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:43:32,962 INFO L93 Difference]: Finished difference Result 26 states and 31 transitions. [2021-01-06 16:43:32,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 16:43:32,963 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2021-01-06 16:43:32,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:43:32,964 INFO L225 Difference]: With dead ends: 26 [2021-01-06 16:43:32,964 INFO L226 Difference]: Without dead ends: 20 [2021-01-06 16:43:32,965 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 16:43:32,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-01-06 16:43:32,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 16. [2021-01-06 16:43:32,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2021-01-06 16:43:32,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 20 transitions. [2021-01-06 16:43:32,970 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 20 transitions. Word has length 10 [2021-01-06 16:43:32,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:43:32,971 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 20 transitions. [2021-01-06 16:43:32,971 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 16:43:32,971 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 20 transitions. [2021-01-06 16:43:32,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-01-06 16:43:32,972 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:43:32,972 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2021-01-06 16:43:32,972 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-01-06 16:43:32,972 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:43:32,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:43:32,973 INFO L82 PathProgramCache]: Analyzing trace with hash 742440183, now seen corresponding path program 1 times [2021-01-06 16:43:32,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:43:32,974 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937912873] [2021-01-06 16:43:32,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:43:32,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:43:33,110 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:43:33,110 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937912873] [2021-01-06 16:43:33,111 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [975476489] [2021-01-06 16:43:33,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:43:33,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:43:33,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 7 conjunts are in the unsatisfiable core [2021-01-06 16:43:33,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:43:33,257 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:43:33,257 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:43:33,258 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-01-06 16:43:33,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697128686] [2021-01-06 16:43:33,258 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-06 16:43:33,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:43:33,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-06 16:43:33,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-01-06 16:43:33,260 INFO L87 Difference]: Start difference. First operand 16 states and 20 transitions. Second operand 6 states. [2021-01-06 16:43:33,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:43:33,389 INFO L93 Difference]: Finished difference Result 24 states and 28 transitions. [2021-01-06 16:43:33,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 16:43:33,392 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2021-01-06 16:43:33,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:43:33,392 INFO L225 Difference]: With dead ends: 24 [2021-01-06 16:43:33,393 INFO L226 Difference]: Without dead ends: 20 [2021-01-06 16:43:33,393 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-01-06 16:43:33,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-01-06 16:43:33,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 18. [2021-01-06 16:43:33,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2021-01-06 16:43:33,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2021-01-06 16:43:33,408 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 10 [2021-01-06 16:43:33,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:43:33,408 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2021-01-06 16:43:33,408 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-06 16:43:33,409 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2021-01-06 16:43:33,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-01-06 16:43:33,409 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:43:33,410 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1] [2021-01-06 16:43:33,613 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:43:33,614 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:43:33,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:43:33,616 INFO L82 PathProgramCache]: Analyzing trace with hash -1267267040, now seen corresponding path program 3 times [2021-01-06 16:43:33,616 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:43:33,617 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453912018] [2021-01-06 16:43:33,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:43:33,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:43:33,812 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:43:33,813 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453912018] [2021-01-06 16:43:33,813 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538306116] [2021-01-06 16:43:33,813 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:43:33,886 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-01-06 16:43:33,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:43:33,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-06 16:43:33,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:43:33,955 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:43:33,956 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:43:33,956 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-01-06 16:43:33,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781381306] [2021-01-06 16:43:33,957 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-06 16:43:33,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:43:33,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-06 16:43:33,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-01-06 16:43:33,958 INFO L87 Difference]: Start difference. First operand 18 states and 22 transitions. Second operand 7 states. [2021-01-06 16:43:34,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:43:34,049 INFO L93 Difference]: Finished difference Result 28 states and 35 transitions. [2021-01-06 16:43:34,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-01-06 16:43:34,050 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2021-01-06 16:43:34,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:43:34,051 INFO L225 Difference]: With dead ends: 28 [2021-01-06 16:43:34,051 INFO L226 Difference]: Without dead ends: 24 [2021-01-06 16:43:34,052 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-01-06 16:43:34,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-01-06 16:43:34,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 20. [2021-01-06 16:43:34,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2021-01-06 16:43:34,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 25 transitions. [2021-01-06 16:43:34,058 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 25 transitions. Word has length 12 [2021-01-06 16:43:34,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:43:34,059 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 25 transitions. [2021-01-06 16:43:34,059 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-06 16:43:34,059 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 25 transitions. [2021-01-06 16:43:34,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-01-06 16:43:34,060 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:43:34,060 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:43:34,273 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:43:34,274 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:43:34,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:43:34,275 INFO L82 PathProgramCache]: Analyzing trace with hash 1250845852, now seen corresponding path program 2 times [2021-01-06 16:43:34,276 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:43:34,277 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615656975] [2021-01-06 16:43:34,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:43:34,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:43:34,331 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 16:43:34,332 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615656975] [2021-01-06 16:43:34,332 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 16:43:34,332 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 16:43:34,333 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676398643] [2021-01-06 16:43:34,333 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 16:43:34,333 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:43:34,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 16:43:34,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 16:43:34,334 INFO L87 Difference]: Start difference. First operand 20 states and 25 transitions. Second operand 3 states. [2021-01-06 16:43:34,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:43:34,350 INFO L93 Difference]: Finished difference Result 31 states and 35 transitions. [2021-01-06 16:43:34,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 16:43:34,351 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2021-01-06 16:43:34,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:43:34,352 INFO L225 Difference]: With dead ends: 31 [2021-01-06 16:43:34,352 INFO L226 Difference]: Without dead ends: 24 [2021-01-06 16:43:34,353 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 16:43:34,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-01-06 16:43:34,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 20. [2021-01-06 16:43:34,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2021-01-06 16:43:34,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2021-01-06 16:43:34,359 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 12 [2021-01-06 16:43:34,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:43:34,359 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2021-01-06 16:43:34,359 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 16:43:34,359 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2021-01-06 16:43:34,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-01-06 16:43:34,360 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:43:34,360 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1] [2021-01-06 16:43:34,360 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-01-06 16:43:34,361 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:43:34,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:43:34,361 INFO L82 PathProgramCache]: Analyzing trace with hash 570787482, now seen corresponding path program 2 times [2021-01-06 16:43:34,362 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:43:34,362 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658761998] [2021-01-06 16:43:34,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:43:34,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:43:34,468 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:43:34,469 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658761998] [2021-01-06 16:43:34,469 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1760552440] [2021-01-06 16:43:34,469 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 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 16:43:34,533 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:43:34,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:43:34,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-06 16:43:34,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:43:34,600 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:43:34,600 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:43:34,600 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-01-06 16:43:34,601 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513243380] [2021-01-06 16:43:34,601 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-06 16:43:34,601 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:43:34,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-06 16:43:34,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-01-06 16:43:34,603 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 7 states. [2021-01-06 16:43:34,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:43:34,682 INFO L93 Difference]: Finished difference Result 27 states and 29 transitions. [2021-01-06 16:43:34,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 16:43:34,683 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2021-01-06 16:43:34,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:43:34,684 INFO L225 Difference]: With dead ends: 27 [2021-01-06 16:43:34,684 INFO L226 Difference]: Without dead ends: 23 [2021-01-06 16:43:34,684 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-01-06 16:43:34,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-01-06 16:43:34,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2021-01-06 16:43:34,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2021-01-06 16:43:34,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2021-01-06 16:43:34,690 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 12 [2021-01-06 16:43:34,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:43:34,691 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2021-01-06 16:43:34,691 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-06 16:43:34,691 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2021-01-06 16:43:34,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 16:43:34,691 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:43:34,692 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1] [2021-01-06 16:43:34,906 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:43:34,907 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:43:34,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:43:34,908 INFO L82 PathProgramCache]: Analyzing trace with hash 1979276421, now seen corresponding path program 4 times [2021-01-06 16:43:34,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:43:34,909 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633813498] [2021-01-06 16:43:34,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:43:34,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:43:35,084 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:43:35,084 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633813498] [2021-01-06 16:43:35,084 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [125517558] [2021-01-06 16:43:35,085 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 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 16:43:35,151 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 16:43:35,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:43:35,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 16:43:35,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:43:35,272 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:43:35,273 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:43:35,273 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-01-06 16:43:35,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517214406] [2021-01-06 16:43:35,277 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-06 16:43:35,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:43:35,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-06 16:43:35,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-01-06 16:43:35,282 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand 8 states. [2021-01-06 16:43:35,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:43:35,420 INFO L93 Difference]: Finished difference Result 29 states and 31 transitions. [2021-01-06 16:43:35,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-06 16:43:35,421 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 14 [2021-01-06 16:43:35,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:43:35,424 INFO L225 Difference]: With dead ends: 29 [2021-01-06 16:43:35,424 INFO L226 Difference]: Without dead ends: 25 [2021-01-06 16:43:35,425 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-01-06 16:43:35,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-01-06 16:43:35,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2021-01-06 16:43:35,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2021-01-06 16:43:35,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2021-01-06 16:43:35,433 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 14 [2021-01-06 16:43:35,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:43:35,434 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2021-01-06 16:43:35,434 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-01-06 16:43:35,434 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2021-01-06 16:43:35,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 16:43:35,435 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:43:35,435 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1] [2021-01-06 16:43:35,650 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:43:35,651 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:43:35,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:43:35,652 INFO L82 PathProgramCache]: Analyzing trace with hash -1178700931, now seen corresponding path program 3 times [2021-01-06 16:43:35,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:43:35,654 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057836177] [2021-01-06 16:43:35,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:43:35,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:43:35,792 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:43:35,792 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057836177] [2021-01-06 16:43:35,793 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [533984350] [2021-01-06 16:43:35,793 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 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 16:43:35,888 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-01-06 16:43:35,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:43:35,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 16:43:35,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:43:35,982 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:43:35,988 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:43:35,988 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-01-06 16:43:35,989 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863435922] [2021-01-06 16:43:35,990 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-06 16:43:35,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:43:35,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-06 16:43:35,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-01-06 16:43:35,992 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 8 states. [2021-01-06 16:43:36,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:43:36,076 INFO L93 Difference]: Finished difference Result 31 states and 33 transitions. [2021-01-06 16:43:36,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-01-06 16:43:36,077 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 14 [2021-01-06 16:43:36,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:43:36,080 INFO L225 Difference]: With dead ends: 31 [2021-01-06 16:43:36,080 INFO L226 Difference]: Without dead ends: 27 [2021-01-06 16:43:36,081 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-01-06 16:43:36,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-01-06 16:43:36,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2021-01-06 16:43:36,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2021-01-06 16:43:36,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2021-01-06 16:43:36,092 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 14 [2021-01-06 16:43:36,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:43:36,093 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2021-01-06 16:43:36,093 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-01-06 16:43:36,094 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2021-01-06 16:43:36,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-01-06 16:43:36,094 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:43:36,094 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1] [2021-01-06 16:43:36,308 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:43:36,308 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:43:36,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:43:36,309 INFO L82 PathProgramCache]: Analyzing trace with hash -533681750, now seen corresponding path program 5 times [2021-01-06 16:43:36,310 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:43:36,311 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806383305] [2021-01-06 16:43:36,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:43:36,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:43:36,447 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:43:36,448 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806383305] [2021-01-06 16:43:36,448 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1717468012] [2021-01-06 16:43:36,448 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 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 16:43:36,512 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-01-06 16:43:36,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:43:36,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-06 16:43:36,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:43:36,607 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:43:36,607 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:43:36,608 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-01-06 16:43:36,608 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865748592] [2021-01-06 16:43:36,609 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-01-06 16:43:36,609 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:43:36,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-01-06 16:43:36,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-01-06 16:43:36,611 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand 9 states. [2021-01-06 16:43:36,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:43:36,702 INFO L93 Difference]: Finished difference Result 33 states and 35 transitions. [2021-01-06 16:43:36,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 16:43:36,703 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 16 [2021-01-06 16:43:36,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:43:36,704 INFO L225 Difference]: With dead ends: 33 [2021-01-06 16:43:36,704 INFO L226 Difference]: Without dead ends: 29 [2021-01-06 16:43:36,705 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-01-06 16:43:36,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-01-06 16:43:36,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2021-01-06 16:43:36,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2021-01-06 16:43:36,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2021-01-06 16:43:36,710 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 16 [2021-01-06 16:43:36,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:43:36,711 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2021-01-06 16:43:36,711 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-01-06 16:43:36,711 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2021-01-06 16:43:36,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-01-06 16:43:36,712 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:43:36,712 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1] [2021-01-06 16:43:36,926 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-01-06 16:43:36,927 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:43:36,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:43:36,928 INFO L82 PathProgramCache]: Analyzing trace with hash 1190114208, now seen corresponding path program 4 times [2021-01-06 16:43:36,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:43:36,929 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183437666] [2021-01-06 16:43:36,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:43:36,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:43:37,029 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:43:37,029 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183437666] [2021-01-06 16:43:37,029 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [278301161] [2021-01-06 16:43:37,030 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 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 16:43:37,101 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 16:43:37,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:43:37,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 16:43:37,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:43:37,156 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:43:37,156 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:43:37,156 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-01-06 16:43:37,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449501609] [2021-01-06 16:43:37,158 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-01-06 16:43:37,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:43:37,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-01-06 16:43:37,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-01-06 16:43:37,160 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 9 states. [2021-01-06 16:43:37,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:43:37,250 INFO L93 Difference]: Finished difference Result 35 states and 37 transitions. [2021-01-06 16:43:37,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-06 16:43:37,251 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 16 [2021-01-06 16:43:37,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:43:37,252 INFO L225 Difference]: With dead ends: 35 [2021-01-06 16:43:37,253 INFO L226 Difference]: Without dead ends: 31 [2021-01-06 16:43:37,253 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-01-06 16:43:37,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-01-06 16:43:37,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2021-01-06 16:43:37,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2021-01-06 16:43:37,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2021-01-06 16:43:37,275 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 16 [2021-01-06 16:43:37,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:43:37,275 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2021-01-06 16:43:37,276 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-01-06 16:43:37,276 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2021-01-06 16:43:37,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-01-06 16:43:37,278 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:43:37,278 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1] [2021-01-06 16:43:37,491 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:43:37,491 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:43:37,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:43:37,492 INFO L82 PathProgramCache]: Analyzing trace with hash -1714863729, now seen corresponding path program 6 times [2021-01-06 16:43:37,492 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:43:37,493 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533208843] [2021-01-06 16:43:37,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:43:37,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:43:37,654 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 16:43:37,655 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533208843] [2021-01-06 16:43:37,655 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [547710146] [2021-01-06 16:43:37,655 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 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 16:43:37,723 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-01-06 16:43:37,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:43:37,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-06 16:43:37,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:43:37,784 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 16:43:37,784 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:43:37,784 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-01-06 16:43:37,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368627021] [2021-01-06 16:43:37,785 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-01-06 16:43:37,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:43:37,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-01-06 16:43:37,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-01-06 16:43:37,786 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand 10 states. [2021-01-06 16:43:37,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:43:37,879 INFO L93 Difference]: Finished difference Result 37 states and 39 transitions. [2021-01-06 16:43:37,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 16:43:37,879 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 18 [2021-01-06 16:43:37,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:43:37,880 INFO L225 Difference]: With dead ends: 37 [2021-01-06 16:43:37,880 INFO L226 Difference]: Without dead ends: 33 [2021-01-06 16:43:37,881 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-01-06 16:43:37,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-01-06 16:43:37,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2021-01-06 16:43:37,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2021-01-06 16:43:37,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2021-01-06 16:43:37,886 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 18 [2021-01-06 16:43:37,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:43:37,886 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2021-01-06 16:43:37,886 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-01-06 16:43:37,886 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2021-01-06 16:43:37,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-01-06 16:43:37,887 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:43:37,887 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1] [2021-01-06 16:43:38,100 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:43:38,101 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:43:38,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:43:38,102 INFO L82 PathProgramCache]: Analyzing trace with hash 1288795907, now seen corresponding path program 5 times [2021-01-06 16:43:38,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:43:38,103 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373573068] [2021-01-06 16:43:38,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:43:38,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:43:38,215 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 16:43:38,216 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373573068] [2021-01-06 16:43:38,216 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [842245370] [2021-01-06 16:43:38,216 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 16:43:38,287 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-01-06 16:43:38,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:43:38,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 16 conjunts are in the unsatisfiable core [2021-01-06 16:43:38,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:43:38,351 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 16:43:38,351 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:43:38,351 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-01-06 16:43:38,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272618684] [2021-01-06 16:43:38,352 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-01-06 16:43:38,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:43:38,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-01-06 16:43:38,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-01-06 16:43:38,353 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand 10 states. [2021-01-06 16:43:38,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:43:38,479 INFO L93 Difference]: Finished difference Result 39 states and 41 transitions. [2021-01-06 16:43:38,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 16:43:38,479 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 18 [2021-01-06 16:43:38,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:43:38,480 INFO L225 Difference]: With dead ends: 39 [2021-01-06 16:43:38,480 INFO L226 Difference]: Without dead ends: 35 [2021-01-06 16:43:38,481 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-01-06 16:43:38,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-01-06 16:43:38,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2021-01-06 16:43:38,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2021-01-06 16:43:38,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2021-01-06 16:43:38,485 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 18 [2021-01-06 16:43:38,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:43:38,486 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2021-01-06 16:43:38,486 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-01-06 16:43:38,486 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2021-01-06 16:43:38,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-01-06 16:43:38,487 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:43:38,487 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1] [2021-01-06 16:43:38,701 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-01-06 16:43:38,702 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:43:38,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:43:38,702 INFO L82 PathProgramCache]: Analyzing trace with hash 1335587892, now seen corresponding path program 7 times [2021-01-06 16:43:38,702 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:43:38,703 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241543944] [2021-01-06 16:43:38,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:43:38,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:43:38,866 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:43:38,867 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241543944] [2021-01-06 16:43:38,867 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [680566806] [2021-01-06 16:43:38,867 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 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 16:43:38,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:43:38,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-01-06 16:43:38,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:43:38,972 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:43:38,973 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:43:38,973 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-01-06 16:43:38,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320221514] [2021-01-06 16:43:38,973 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-06 16:43:38,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:43:38,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-06 16:43:38,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-01-06 16:43:38,975 INFO L87 Difference]: Start difference. First operand 34 states and 36 transitions. Second operand 11 states. [2021-01-06 16:43:39,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:43:39,093 INFO L93 Difference]: Finished difference Result 41 states and 43 transitions. [2021-01-06 16:43:39,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 16:43:39,094 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 20 [2021-01-06 16:43:39,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:43:39,094 INFO L225 Difference]: With dead ends: 41 [2021-01-06 16:43:39,095 INFO L226 Difference]: Without dead ends: 37 [2021-01-06 16:43:39,095 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-01-06 16:43:39,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-01-06 16:43:39,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2021-01-06 16:43:39,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2021-01-06 16:43:39,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2021-01-06 16:43:39,100 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 20 [2021-01-06 16:43:39,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:43:39,101 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2021-01-06 16:43:39,101 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-01-06 16:43:39,101 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2021-01-06 16:43:39,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-01-06 16:43:39,102 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:43:39,102 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1] [2021-01-06 16:43:39,316 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-01-06 16:43:39,317 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:43:39,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:43:39,318 INFO L82 PathProgramCache]: Analyzing trace with hash 1632628134, now seen corresponding path program 6 times [2021-01-06 16:43:39,318 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:43:39,318 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079032277] [2021-01-06 16:43:39,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:43:39,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:43:39,450 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:43:39,451 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079032277] [2021-01-06 16:43:39,451 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1158016397] [2021-01-06 16:43:39,451 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:43:39,563 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-01-06 16:43:39,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:43:39,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 21 conjunts are in the unsatisfiable core [2021-01-06 16:43:39,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:43:39,654 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:43:39,654 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:43:39,654 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-01-06 16:43:39,655 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347315864] [2021-01-06 16:43:39,655 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-06 16:43:39,655 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:43:39,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-06 16:43:39,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-01-06 16:43:39,656 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand 11 states. [2021-01-06 16:43:39,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:43:39,821 INFO L93 Difference]: Finished difference Result 43 states and 45 transitions. [2021-01-06 16:43:39,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 16:43:39,823 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 20 [2021-01-06 16:43:39,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:43:39,824 INFO L225 Difference]: With dead ends: 43 [2021-01-06 16:43:39,824 INFO L226 Difference]: Without dead ends: 39 [2021-01-06 16:43:39,824 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 5 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-01-06 16:43:39,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-01-06 16:43:39,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2021-01-06 16:43:39,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2021-01-06 16:43:39,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2021-01-06 16:43:39,830 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 20 [2021-01-06 16:43:39,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:43:39,830 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2021-01-06 16:43:39,830 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-01-06 16:43:39,831 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2021-01-06 16:43:39,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-01-06 16:43:39,831 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:43:39,831 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1] [2021-01-06 16:43:40,036 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-01-06 16:43:40,037 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:43:40,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:43:40,037 INFO L82 PathProgramCache]: Analyzing trace with hash -643067495, now seen corresponding path program 8 times [2021-01-06 16:43:40,038 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:43:40,038 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34409851] [2021-01-06 16:43:40,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:43:40,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:43:40,172 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:43:40,173 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34409851] [2021-01-06 16:43:40,173 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [103191121] [2021-01-06 16:43:40,173 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 16:43:40,223 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:43:40,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:43:40,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 19 conjunts are in the unsatisfiable core [2021-01-06 16:43:40,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:43:40,288 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:43:40,288 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:43:40,289 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-01-06 16:43:40,289 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664458932] [2021-01-06 16:43:40,289 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-01-06 16:43:40,289 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:43:40,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-01-06 16:43:40,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-01-06 16:43:40,290 INFO L87 Difference]: Start difference. First operand 38 states and 40 transitions. Second operand 12 states. [2021-01-06 16:43:40,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:43:40,437 INFO L93 Difference]: Finished difference Result 45 states and 47 transitions. [2021-01-06 16:43:40,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 16:43:40,438 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 22 [2021-01-06 16:43:40,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:43:40,439 INFO L225 Difference]: With dead ends: 45 [2021-01-06 16:43:40,439 INFO L226 Difference]: Without dead ends: 41 [2021-01-06 16:43:40,439 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-01-06 16:43:40,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-01-06 16:43:40,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 40. [2021-01-06 16:43:40,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2021-01-06 16:43:40,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2021-01-06 16:43:40,445 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 22 [2021-01-06 16:43:40,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:43:40,445 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2021-01-06 16:43:40,445 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-01-06 16:43:40,445 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2021-01-06 16:43:40,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-01-06 16:43:40,446 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:43:40,446 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1] [2021-01-06 16:43:40,661 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:43:40,662 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:43:40,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:43:40,663 INFO L82 PathProgramCache]: Analyzing trace with hash 1342916489, now seen corresponding path program 7 times [2021-01-06 16:43:40,663 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:43:40,664 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014682354] [2021-01-06 16:43:40,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:43:40,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:43:40,795 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:43:40,796 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014682354] [2021-01-06 16:43:40,796 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42742217] [2021-01-06 16:43:40,796 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 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 16:43:40,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:43:40,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 19 conjunts are in the unsatisfiable core [2021-01-06 16:43:40,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:43:40,907 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:43:40,907 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:43:40,908 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-01-06 16:43:40,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661799125] [2021-01-06 16:43:40,908 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-01-06 16:43:40,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:43:40,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-01-06 16:43:40,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-01-06 16:43:40,909 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand 12 states. [2021-01-06 16:43:41,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:43:41,058 INFO L93 Difference]: Finished difference Result 47 states and 49 transitions. [2021-01-06 16:43:41,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 16:43:41,059 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 22 [2021-01-06 16:43:41,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:43:41,059 INFO L225 Difference]: With dead ends: 47 [2021-01-06 16:43:41,060 INFO L226 Difference]: Without dead ends: 43 [2021-01-06 16:43:41,060 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-01-06 16:43:41,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-01-06 16:43:41,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2021-01-06 16:43:41,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2021-01-06 16:43:41,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2021-01-06 16:43:41,065 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 22 [2021-01-06 16:43:41,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:43:41,066 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2021-01-06 16:43:41,066 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-01-06 16:43:41,066 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2021-01-06 16:43:41,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-01-06 16:43:41,067 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:43:41,067 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1] [2021-01-06 16:43:41,280 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:43:41,281 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:43:41,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:43:41,282 INFO L82 PathProgramCache]: Analyzing trace with hash 539617726, now seen corresponding path program 9 times [2021-01-06 16:43:41,282 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:43:41,282 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027822157] [2021-01-06 16:43:41,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:43:41,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:43:41,445 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:43:41,446 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027822157] [2021-01-06 16:43:41,446 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1696289764] [2021-01-06 16:43:41,446 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:43:41,533 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-01-06 16:43:41,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:43:41,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 21 conjunts are in the unsatisfiable core [2021-01-06 16:43:41,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:43:41,592 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:43:41,592 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:43:41,592 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-01-06 16:43:41,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214429232] [2021-01-06 16:43:41,593 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-06 16:43:41,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:43:41,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-06 16:43:41,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-01-06 16:43:41,594 INFO L87 Difference]: Start difference. First operand 42 states and 44 transitions. Second operand 13 states. [2021-01-06 16:43:41,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:43:41,755 INFO L93 Difference]: Finished difference Result 49 states and 51 transitions. [2021-01-06 16:43:41,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-01-06 16:43:41,756 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 24 [2021-01-06 16:43:41,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:43:41,756 INFO L225 Difference]: With dead ends: 49 [2021-01-06 16:43:41,756 INFO L226 Difference]: Without dead ends: 45 [2021-01-06 16:43:41,757 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-01-06 16:43:41,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-01-06 16:43:41,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2021-01-06 16:43:41,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2021-01-06 16:43:41,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2021-01-06 16:43:41,762 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 24 [2021-01-06 16:43:41,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:43:41,762 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2021-01-06 16:43:41,762 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-01-06 16:43:41,762 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2021-01-06 16:43:41,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-01-06 16:43:41,763 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:43:41,763 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1] [2021-01-06 16:43:41,978 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:43:41,979 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:43:41,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:43:41,979 INFO L82 PathProgramCache]: Analyzing trace with hash 2102899884, now seen corresponding path program 8 times [2021-01-06 16:43:41,980 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:43:41,980 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069032668] [2021-01-06 16:43:41,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:43:41,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:43:42,164 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:43:42,164 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069032668] [2021-01-06 16:43:42,164 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [528684726] [2021-01-06 16:43:42,164 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:43:42,209 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:43:42,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:43:42,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 21 conjunts are in the unsatisfiable core [2021-01-06 16:43:42,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:43:42,266 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:43:42,266 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:43:42,266 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-01-06 16:43:42,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341163183] [2021-01-06 16:43:42,267 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-06 16:43:42,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:43:42,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-06 16:43:42,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-01-06 16:43:42,268 INFO L87 Difference]: Start difference. First operand 44 states and 46 transitions. Second operand 13 states. [2021-01-06 16:43:42,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:43:42,446 INFO L93 Difference]: Finished difference Result 51 states and 53 transitions. [2021-01-06 16:43:42,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 16:43:42,446 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 24 [2021-01-06 16:43:42,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:43:42,447 INFO L225 Difference]: With dead ends: 51 [2021-01-06 16:43:42,447 INFO L226 Difference]: Without dead ends: 47 [2021-01-06 16:43:42,448 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-01-06 16:43:42,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-01-06 16:43:42,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2021-01-06 16:43:42,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2021-01-06 16:43:42,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 48 transitions. [2021-01-06 16:43:42,453 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 48 transitions. Word has length 24 [2021-01-06 16:43:42,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:43:42,454 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 48 transitions. [2021-01-06 16:43:42,454 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-01-06 16:43:42,454 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 48 transitions. [2021-01-06 16:43:42,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-01-06 16:43:42,454 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:43:42,455 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1] [2021-01-06 16:43:42,667 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-01-06 16:43:42,668 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:43:42,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:43:42,669 INFO L82 PathProgramCache]: Analyzing trace with hash -1066218333, now seen corresponding path program 10 times [2021-01-06 16:43:42,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:43:42,670 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561049891] [2021-01-06 16:43:42,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:43:42,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:43:42,839 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:43:42,840 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561049891] [2021-01-06 16:43:42,840 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1300034839] [2021-01-06 16:43:42,840 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 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 16:43:42,885 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 16:43:42,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:43:42,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-01-06 16:43:42,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:43:42,950 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:43:42,951 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:43:42,951 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-01-06 16:43:42,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202270023] [2021-01-06 16:43:42,952 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-06 16:43:42,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:43:42,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-06 16:43:42,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-01-06 16:43:42,953 INFO L87 Difference]: Start difference. First operand 46 states and 48 transitions. Second operand 14 states. [2021-01-06 16:43:43,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:43:43,144 INFO L93 Difference]: Finished difference Result 53 states and 55 transitions. [2021-01-06 16:43:43,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-01-06 16:43:43,145 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 26 [2021-01-06 16:43:43,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:43:43,146 INFO L225 Difference]: With dead ends: 53 [2021-01-06 16:43:43,146 INFO L226 Difference]: Without dead ends: 49 [2021-01-06 16:43:43,147 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-01-06 16:43:43,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-01-06 16:43:43,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2021-01-06 16:43:43,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2021-01-06 16:43:43,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 50 transitions. [2021-01-06 16:43:43,152 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 50 transitions. Word has length 26 [2021-01-06 16:43:43,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:43:43,152 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 50 transitions. [2021-01-06 16:43:43,153 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2021-01-06 16:43:43,153 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 50 transitions. [2021-01-06 16:43:43,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-01-06 16:43:43,153 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:43:43,153 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1] [2021-01-06 16:43:43,367 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-01-06 16:43:43,368 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:43:43,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:43:43,369 INFO L82 PathProgramCache]: Analyzing trace with hash -1992465137, now seen corresponding path program 9 times [2021-01-06 16:43:43,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:43:43,370 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522274505] [2021-01-06 16:43:43,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:43:43,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:43:43,533 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:43:43,534 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522274505] [2021-01-06 16:43:43,534 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1781021425] [2021-01-06 16:43:43,534 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:43:43,615 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-01-06 16:43:43,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:43:43,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 24 conjunts are in the unsatisfiable core [2021-01-06 16:43:43,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:43:43,690 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:43:43,690 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:43:43,691 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-01-06 16:43:43,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186468724] [2021-01-06 16:43:43,691 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-06 16:43:43,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:43:43,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-06 16:43:43,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-01-06 16:43:43,692 INFO L87 Difference]: Start difference. First operand 48 states and 50 transitions. Second operand 14 states. [2021-01-06 16:43:43,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:43:43,950 INFO L93 Difference]: Finished difference Result 55 states and 57 transitions. [2021-01-06 16:43:43,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-01-06 16:43:43,950 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 26 [2021-01-06 16:43:43,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:43:43,951 INFO L225 Difference]: With dead ends: 55 [2021-01-06 16:43:43,951 INFO L226 Difference]: Without dead ends: 51 [2021-01-06 16:43:43,952 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-01-06 16:43:43,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-01-06 16:43:43,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2021-01-06 16:43:43,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2021-01-06 16:43:43,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 52 transitions. [2021-01-06 16:43:43,957 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 52 transitions. Word has length 26 [2021-01-06 16:43:43,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:43:43,957 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 52 transitions. [2021-01-06 16:43:43,958 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2021-01-06 16:43:43,958 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 52 transitions. [2021-01-06 16:43:43,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-01-06 16:43:43,961 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:43:43,961 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1] [2021-01-06 16:43:44,162 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-01-06 16:43:44,162 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:43:44,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:43:44,163 INFO L82 PathProgramCache]: Analyzing trace with hash 1913555528, now seen corresponding path program 11 times [2021-01-06 16:43:44,163 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:43:44,164 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779630153] [2021-01-06 16:43:44,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:43:44,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:43:44,389 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:43:44,390 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779630153] [2021-01-06 16:43:44,390 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1815130091] [2021-01-06 16:43:44,390 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 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 16:43:44,631 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-01-06 16:43:44,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:43:44,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 25 conjunts are in the unsatisfiable core [2021-01-06 16:43:44,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:43:44,699 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:43:44,699 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:43:44,700 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-01-06 16:43:44,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726370169] [2021-01-06 16:43:44,700 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-01-06 16:43:44,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:43:44,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-01-06 16:43:44,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-01-06 16:43:44,701 INFO L87 Difference]: Start difference. First operand 50 states and 52 transitions. Second operand 15 states. [2021-01-06 16:43:44,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:43:44,929 INFO L93 Difference]: Finished difference Result 57 states and 59 transitions. [2021-01-06 16:43:44,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-01-06 16:43:44,930 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 28 [2021-01-06 16:43:44,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:43:44,931 INFO L225 Difference]: With dead ends: 57 [2021-01-06 16:43:44,931 INFO L226 Difference]: Without dead ends: 53 [2021-01-06 16:43:44,931 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-01-06 16:43:44,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-01-06 16:43:44,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 52. [2021-01-06 16:43:44,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2021-01-06 16:43:44,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 54 transitions. [2021-01-06 16:43:44,936 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 54 transitions. Word has length 28 [2021-01-06 16:43:44,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:43:44,937 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 54 transitions. [2021-01-06 16:43:44,937 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2021-01-06 16:43:44,937 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 54 transitions. [2021-01-06 16:43:44,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-01-06 16:43:44,937 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:43:44,938 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1] [2021-01-06 16:43:45,150 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-01-06 16:43:45,150 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:43:45,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:43:45,151 INFO L82 PathProgramCache]: Analyzing trace with hash 846760114, now seen corresponding path program 10 times [2021-01-06 16:43:45,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:43:45,151 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070260760] [2021-01-06 16:43:45,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:43:45,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:43:45,372 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:43:45,372 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070260760] [2021-01-06 16:43:45,372 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1519905240] [2021-01-06 16:43:45,372 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 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 16:43:45,421 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 16:43:45,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:43:45,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 25 conjunts are in the unsatisfiable core [2021-01-06 16:43:45,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:43:45,495 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:43:45,496 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:43:45,496 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-01-06 16:43:45,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356243461] [2021-01-06 16:43:45,497 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-01-06 16:43:45,497 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:43:45,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-01-06 16:43:45,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-01-06 16:43:45,498 INFO L87 Difference]: Start difference. First operand 52 states and 54 transitions. Second operand 15 states. [2021-01-06 16:43:45,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:43:45,755 INFO L93 Difference]: Finished difference Result 59 states and 61 transitions. [2021-01-06 16:43:45,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-01-06 16:43:45,756 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 28 [2021-01-06 16:43:45,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:43:45,757 INFO L225 Difference]: With dead ends: 59 [2021-01-06 16:43:45,757 INFO L226 Difference]: Without dead ends: 55 [2021-01-06 16:43:45,757 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-01-06 16:43:45,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-01-06 16:43:45,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2021-01-06 16:43:45,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2021-01-06 16:43:45,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 56 transitions. [2021-01-06 16:43:45,762 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 56 transitions. Word has length 28 [2021-01-06 16:43:45,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:43:45,762 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 56 transitions. [2021-01-06 16:43:45,762 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2021-01-06 16:43:45,762 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 56 transitions. [2021-01-06 16:43:45,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-01-06 16:43:45,763 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:43:45,763 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1] [2021-01-06 16:43:45,978 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-01-06 16:43:45,979 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:43:45,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:43:45,980 INFO L82 PathProgramCache]: Analyzing trace with hash 733049517, now seen corresponding path program 12 times [2021-01-06 16:43:45,980 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:43:45,980 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327033881] [2021-01-06 16:43:45,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:43:45,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:43:46,184 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:43:46,184 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327033881] [2021-01-06 16:43:46,185 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1809743088] [2021-01-06 16:43:46,185 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:43:46,403 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-01-06 16:43:46,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:43:46,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 36 conjunts are in the unsatisfiable core [2021-01-06 16:43:46,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:43:46,602 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:43:46,602 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:43:46,602 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-01-06 16:43:46,603 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504998241] [2021-01-06 16:43:46,603 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-06 16:43:46,603 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:43:46,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-06 16:43:46,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-01-06 16:43:46,604 INFO L87 Difference]: Start difference. First operand 54 states and 56 transitions. Second operand 16 states. [2021-01-06 16:43:46,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:43:46,869 INFO L93 Difference]: Finished difference Result 61 states and 63 transitions. [2021-01-06 16:43:46,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-01-06 16:43:46,869 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 30 [2021-01-06 16:43:46,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:43:46,870 INFO L225 Difference]: With dead ends: 61 [2021-01-06 16:43:46,870 INFO L226 Difference]: Without dead ends: 57 [2021-01-06 16:43:46,871 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 10 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-01-06 16:43:46,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-01-06 16:43:46,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 56. [2021-01-06 16:43:46,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2021-01-06 16:43:46,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 58 transitions. [2021-01-06 16:43:46,875 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 58 transitions. Word has length 30 [2021-01-06 16:43:46,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:43:46,875 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 58 transitions. [2021-01-06 16:43:46,875 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-01-06 16:43:46,875 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 58 transitions. [2021-01-06 16:43:46,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-01-06 16:43:46,876 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:43:46,876 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1] [2021-01-06 16:43:47,080 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:43:47,081 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:43:47,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:43:47,081 INFO L82 PathProgramCache]: Analyzing trace with hash 2037993365, now seen corresponding path program 11 times [2021-01-06 16:43:47,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:43:47,082 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856153538] [2021-01-06 16:43:47,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:43:47,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:43:47,297 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:43:47,298 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856153538] [2021-01-06 16:43:47,298 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1159143147] [2021-01-06 16:43:47,298 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 16:43:47,649 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-01-06 16:43:47,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:43:47,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 39 conjunts are in the unsatisfiable core [2021-01-06 16:43:47,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:43:47,869 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:43:47,870 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:43:47,870 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-01-06 16:43:47,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898659704] [2021-01-06 16:43:47,871 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-06 16:43:47,871 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:43:47,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-06 16:43:47,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-01-06 16:43:47,872 INFO L87 Difference]: Start difference. First operand 56 states and 58 transitions. Second operand 16 states. [2021-01-06 16:43:48,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:43:48,178 INFO L93 Difference]: Finished difference Result 63 states and 65 transitions. [2021-01-06 16:43:48,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-01-06 16:43:48,178 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 30 [2021-01-06 16:43:48,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:43:48,179 INFO L225 Difference]: With dead ends: 63 [2021-01-06 16:43:48,179 INFO L226 Difference]: Without dead ends: 59 [2021-01-06 16:43:48,180 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 13 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-01-06 16:43:48,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-01-06 16:43:48,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 58. [2021-01-06 16:43:48,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2021-01-06 16:43:48,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 60 transitions. [2021-01-06 16:43:48,185 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 60 transitions. Word has length 30 [2021-01-06 16:43:48,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:43:48,185 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 60 transitions. [2021-01-06 16:43:48,185 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-01-06 16:43:48,185 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 60 transitions. [2021-01-06 16:43:48,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-01-06 16:43:48,186 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:43:48,186 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1] [2021-01-06 16:43:48,390 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-01-06 16:43:48,390 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:43:48,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:43:48,391 INFO L82 PathProgramCache]: Analyzing trace with hash 138139090, now seen corresponding path program 13 times [2021-01-06 16:43:48,391 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:43:48,392 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606497940] [2021-01-06 16:43:48,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:43:48,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:43:48,648 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:43:48,648 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606497940] [2021-01-06 16:43:48,648 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1699867296] [2021-01-06 16:43:48,648 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 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 16:43:48,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:43:48,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 29 conjunts are in the unsatisfiable core [2021-01-06 16:43:48,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:43:48,767 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:43:48,767 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:43:48,767 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-01-06 16:43:48,767 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814932357] [2021-01-06 16:43:48,768 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 16:43:48,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:43:48,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 16:43:48,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-01-06 16:43:48,769 INFO L87 Difference]: Start difference. First operand 58 states and 60 transitions. Second operand 17 states. [2021-01-06 16:43:49,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:43:49,119 INFO L93 Difference]: Finished difference Result 65 states and 67 transitions. [2021-01-06 16:43:49,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-01-06 16:43:49,120 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 32 [2021-01-06 16:43:49,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:43:49,121 INFO L225 Difference]: With dead ends: 65 [2021-01-06 16:43:49,122 INFO L226 Difference]: Without dead ends: 61 [2021-01-06 16:43:49,122 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-01-06 16:43:49,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-01-06 16:43:49,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 60. [2021-01-06 16:43:49,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2021-01-06 16:43:49,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 62 transitions. [2021-01-06 16:43:49,127 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 62 transitions. Word has length 32 [2021-01-06 16:43:49,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:43:49,127 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 62 transitions. [2021-01-06 16:43:49,127 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 16:43:49,127 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 62 transitions. [2021-01-06 16:43:49,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-01-06 16:43:49,128 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:43:49,128 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1] [2021-01-06 16:43:49,331 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:43:49,332 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:43:49,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:43:49,332 INFO L82 PathProgramCache]: Analyzing trace with hash 56879544, now seen corresponding path program 12 times [2021-01-06 16:43:49,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:43:49,333 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939078496] [2021-01-06 16:43:49,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:43:49,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:43:49,564 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:43:49,564 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939078496] [2021-01-06 16:43:49,564 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [777379651] [2021-01-06 16:43:49,564 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 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 16:43:49,718 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2021-01-06 16:43:49,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:43:49,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 29 conjunts are in the unsatisfiable core [2021-01-06 16:43:49,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:43:49,792 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:43:49,792 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:43:49,792 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-01-06 16:43:49,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103816786] [2021-01-06 16:43:49,793 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 16:43:49,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:43:49,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 16:43:49,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-01-06 16:43:49,794 INFO L87 Difference]: Start difference. First operand 60 states and 62 transitions. Second operand 17 states. [2021-01-06 16:43:50,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:43:50,191 INFO L93 Difference]: Finished difference Result 67 states and 69 transitions. [2021-01-06 16:43:50,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-01-06 16:43:50,192 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 32 [2021-01-06 16:43:50,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:43:50,193 INFO L225 Difference]: With dead ends: 67 [2021-01-06 16:43:50,193 INFO L226 Difference]: Without dead ends: 63 [2021-01-06 16:43:50,194 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-01-06 16:43:50,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-01-06 16:43:50,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62. [2021-01-06 16:43:50,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2021-01-06 16:43:50,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 64 transitions. [2021-01-06 16:43:50,199 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 64 transitions. Word has length 32 [2021-01-06 16:43:50,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:43:50,199 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 64 transitions. [2021-01-06 16:43:50,199 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 16:43:50,200 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 64 transitions. [2021-01-06 16:43:50,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-01-06 16:43:50,200 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:43:50,200 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1] [2021-01-06 16:43:50,400 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-01-06 16:43:50,401 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:43:50,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:43:50,402 INFO L82 PathProgramCache]: Analyzing trace with hash -340130889, now seen corresponding path program 14 times [2021-01-06 16:43:50,402 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:43:50,403 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442653231] [2021-01-06 16:43:50,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:43:50,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:43:50,691 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:43:50,692 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442653231] [2021-01-06 16:43:50,692 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1453235435] [2021-01-06 16:43:50,692 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 16:43:50,731 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:43:50,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:43:50,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 31 conjunts are in the unsatisfiable core [2021-01-06 16:43:50,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:43:50,822 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:43:50,822 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:43:50,822 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-01-06 16:43:50,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183351506] [2021-01-06 16:43:50,823 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-06 16:43:50,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:43:50,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-06 16:43:50,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-01-06 16:43:50,824 INFO L87 Difference]: Start difference. First operand 62 states and 64 transitions. Second operand 18 states. [2021-01-06 16:43:51,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:43:51,131 INFO L93 Difference]: Finished difference Result 69 states and 71 transitions. [2021-01-06 16:43:51,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-01-06 16:43:51,132 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 34 [2021-01-06 16:43:51,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:43:51,133 INFO L225 Difference]: With dead ends: 69 [2021-01-06 16:43:51,133 INFO L226 Difference]: Without dead ends: 65 [2021-01-06 16:43:51,133 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-01-06 16:43:51,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-01-06 16:43:51,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 64. [2021-01-06 16:43:51,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2021-01-06 16:43:51,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 66 transitions. [2021-01-06 16:43:51,139 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 66 transitions. Word has length 34 [2021-01-06 16:43:51,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:43:51,139 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 66 transitions. [2021-01-06 16:43:51,139 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2021-01-06 16:43:51,139 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 66 transitions. [2021-01-06 16:43:51,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-01-06 16:43:51,140 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:43:51,140 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1] [2021-01-06 16:43:51,356 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:43:51,356 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:43:51,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:43:51,357 INFO L82 PathProgramCache]: Analyzing trace with hash -1122990309, now seen corresponding path program 13 times [2021-01-06 16:43:51,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:43:51,358 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482220517] [2021-01-06 16:43:51,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:43:51,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:43:51,648 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:43:51,649 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482220517] [2021-01-06 16:43:51,649 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1789050793] [2021-01-06 16:43:51,649 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 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 16:43:51,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:43:51,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 31 conjunts are in the unsatisfiable core [2021-01-06 16:43:51,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:43:51,770 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:43:51,771 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:43:51,771 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-01-06 16:43:51,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040397877] [2021-01-06 16:43:51,772 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-06 16:43:51,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:43:51,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-06 16:43:51,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-01-06 16:43:51,773 INFO L87 Difference]: Start difference. First operand 64 states and 66 transitions. Second operand 18 states. [2021-01-06 16:43:52,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:43:52,240 INFO L93 Difference]: Finished difference Result 71 states and 73 transitions. [2021-01-06 16:43:52,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-01-06 16:43:52,240 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 34 [2021-01-06 16:43:52,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:43:52,241 INFO L225 Difference]: With dead ends: 71 [2021-01-06 16:43:52,241 INFO L226 Difference]: Without dead ends: 67 [2021-01-06 16:43:52,242 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-01-06 16:43:52,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-01-06 16:43:52,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 66. [2021-01-06 16:43:52,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2021-01-06 16:43:52,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 68 transitions. [2021-01-06 16:43:52,249 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 68 transitions. Word has length 34 [2021-01-06 16:43:52,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:43:52,249 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 68 transitions. [2021-01-06 16:43:52,250 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2021-01-06 16:43:52,250 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 68 transitions. [2021-01-06 16:43:52,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-01-06 16:43:52,250 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:43:52,250 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1] [2021-01-06 16:43:52,465 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-01-06 16:43:52,466 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:43:52,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:43:52,467 INFO L82 PathProgramCache]: Analyzing trace with hash -396080036, now seen corresponding path program 15 times [2021-01-06 16:43:52,467 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:43:52,467 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320296491] [2021-01-06 16:43:52,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:43:52,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:43:52,816 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:43:52,816 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320296491] [2021-01-06 16:43:52,817 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1055909962] [2021-01-06 16:43:52,817 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 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 16:43:53,001 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-01-06 16:43:53,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:43:53,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 36 conjunts are in the unsatisfiable core [2021-01-06 16:43:53,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:43:53,179 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:43:53,180 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:43:53,180 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-01-06 16:43:53,180 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034768664] [2021-01-06 16:43:53,180 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-06 16:43:53,181 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:43:53,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-06 16:43:53,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-01-06 16:43:53,181 INFO L87 Difference]: Start difference. First operand 66 states and 68 transitions. Second operand 19 states. [2021-01-06 16:43:53,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:43:53,594 INFO L93 Difference]: Finished difference Result 73 states and 75 transitions. [2021-01-06 16:43:53,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-01-06 16:43:53,595 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 36 [2021-01-06 16:43:53,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:43:53,595 INFO L225 Difference]: With dead ends: 73 [2021-01-06 16:43:53,596 INFO L226 Difference]: Without dead ends: 69 [2021-01-06 16:43:53,596 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 33 SyntacticMatches, 4 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-01-06 16:43:53,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-01-06 16:43:53,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 68. [2021-01-06 16:43:53,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2021-01-06 16:43:53,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 70 transitions. [2021-01-06 16:43:53,604 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 70 transitions. Word has length 36 [2021-01-06 16:43:53,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:43:53,604 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 70 transitions. [2021-01-06 16:43:53,604 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-06 16:43:53,604 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 70 transitions. [2021-01-06 16:43:53,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-01-06 16:43:53,605 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:43:53,605 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1] [2021-01-06 16:43:53,809 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:43:53,810 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:43:53,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:43:53,810 INFO L82 PathProgramCache]: Analyzing trace with hash -1106552898, now seen corresponding path program 14 times [2021-01-06 16:43:53,811 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:43:53,811 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709915820] [2021-01-06 16:43:53,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:43:53,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:43:54,142 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:43:54,143 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709915820] [2021-01-06 16:43:54,143 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1934198161] [2021-01-06 16:43:54,143 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 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 16:43:54,188 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:43:54,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:43:54,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 33 conjunts are in the unsatisfiable core [2021-01-06 16:43:54,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:43:54,267 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:43:54,267 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:43:54,267 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-01-06 16:43:54,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790091153] [2021-01-06 16:43:54,268 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-06 16:43:54,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:43:54,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-06 16:43:54,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-01-06 16:43:54,269 INFO L87 Difference]: Start difference. First operand 68 states and 70 transitions. Second operand 19 states. [2021-01-06 16:43:54,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:43:54,783 INFO L93 Difference]: Finished difference Result 75 states and 77 transitions. [2021-01-06 16:43:54,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-01-06 16:43:54,784 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 36 [2021-01-06 16:43:54,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:43:54,785 INFO L225 Difference]: With dead ends: 75 [2021-01-06 16:43:54,785 INFO L226 Difference]: Without dead ends: 71 [2021-01-06 16:43:54,786 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-01-06 16:43:54,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-01-06 16:43:54,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 70. [2021-01-06 16:43:54,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2021-01-06 16:43:54,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 72 transitions. [2021-01-06 16:43:54,791 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 72 transitions. Word has length 36 [2021-01-06 16:43:54,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:43:54,791 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 72 transitions. [2021-01-06 16:43:54,791 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-06 16:43:54,791 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 72 transitions. [2021-01-06 16:43:54,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-01-06 16:43:54,792 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:43:54,792 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1] [2021-01-06 16:43:55,001 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-01-06 16:43:55,002 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:43:55,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:43:55,003 INFO L82 PathProgramCache]: Analyzing trace with hash 1671364545, now seen corresponding path program 16 times [2021-01-06 16:43:55,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:43:55,004 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574681063] [2021-01-06 16:43:55,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:43:55,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:43:55,350 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:43:55,350 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574681063] [2021-01-06 16:43:55,350 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [974904258] [2021-01-06 16:43:55,350 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 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 16:43:55,396 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 16:43:55,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:43:55,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 35 conjunts are in the unsatisfiable core [2021-01-06 16:43:55,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:43:55,500 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:43:55,501 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:43:55,501 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2021-01-06 16:43:55,501 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641582933] [2021-01-06 16:43:55,502 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-01-06 16:43:55,502 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:43:55,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-01-06 16:43:55,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2021-01-06 16:43:55,503 INFO L87 Difference]: Start difference. First operand 70 states and 72 transitions. Second operand 20 states. [2021-01-06 16:43:55,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:43:55,966 INFO L93 Difference]: Finished difference Result 77 states and 79 transitions. [2021-01-06 16:43:55,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-01-06 16:43:55,967 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 38 [2021-01-06 16:43:55,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:43:55,968 INFO L225 Difference]: With dead ends: 77 [2021-01-06 16:43:55,968 INFO L226 Difference]: Without dead ends: 73 [2021-01-06 16:43:55,969 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2021-01-06 16:43:55,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-01-06 16:43:55,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 72. [2021-01-06 16:43:55,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2021-01-06 16:43:55,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 74 transitions. [2021-01-06 16:43:55,974 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 74 transitions. Word has length 38 [2021-01-06 16:43:55,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:43:55,974 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 74 transitions. [2021-01-06 16:43:55,974 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2021-01-06 16:43:55,974 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 74 transitions. [2021-01-06 16:43:55,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-01-06 16:43:55,975 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:43:55,975 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1] [2021-01-06 16:43:56,189 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:43:56,190 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:43:56,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:43:56,191 INFO L82 PathProgramCache]: Analyzing trace with hash 1804897185, now seen corresponding path program 15 times [2021-01-06 16:43:56,192 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:43:56,192 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015929266] [2021-01-06 16:43:56,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:43:56,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:43:56,545 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:43:56,545 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015929266] [2021-01-06 16:43:56,545 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [105585915] [2021-01-06 16:43:56,545 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 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 16:43:56,729 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2021-01-06 16:43:56,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:43:56,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 36 conjunts are in the unsatisfiable core [2021-01-06 16:43:56,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:43:56,843 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:43:56,843 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:43:56,843 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2021-01-06 16:43:56,843 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689911249] [2021-01-06 16:43:56,844 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-01-06 16:43:56,844 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:43:56,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-01-06 16:43:56,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2021-01-06 16:43:56,845 INFO L87 Difference]: Start difference. First operand 72 states and 74 transitions. Second operand 20 states. [2021-01-06 16:43:57,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:43:57,388 INFO L93 Difference]: Finished difference Result 79 states and 81 transitions. [2021-01-06 16:43:57,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-01-06 16:43:57,388 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 38 [2021-01-06 16:43:57,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:43:57,389 INFO L225 Difference]: With dead ends: 79 [2021-01-06 16:43:57,389 INFO L226 Difference]: Without dead ends: 75 [2021-01-06 16:43:57,390 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2021-01-06 16:43:57,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-01-06 16:43:57,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 74. [2021-01-06 16:43:57,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2021-01-06 16:43:57,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 76 transitions. [2021-01-06 16:43:57,395 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 76 transitions. Word has length 38 [2021-01-06 16:43:57,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:43:57,395 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 76 transitions. [2021-01-06 16:43:57,395 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2021-01-06 16:43:57,395 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 76 transitions. [2021-01-06 16:43:57,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-01-06 16:43:57,396 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:43:57,396 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1] [2021-01-06 16:43:57,600 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-01-06 16:43:57,600 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:43:57,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:43:57,601 INFO L82 PathProgramCache]: Analyzing trace with hash -84251162, now seen corresponding path program 17 times [2021-01-06 16:43:57,602 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:43:57,602 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543582439] [2021-01-06 16:43:57,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:43:57,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:43:57,926 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:43:57,926 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543582439] [2021-01-06 16:43:57,926 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1787452258] [2021-01-06 16:43:57,926 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 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 16:43:58,439 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2021-01-06 16:43:58,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:43:58,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 51 conjunts are in the unsatisfiable core [2021-01-06 16:43:58,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:43:58,734 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:43:58,734 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:43:58,734 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2021-01-06 16:43:58,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505469465] [2021-01-06 16:43:58,735 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-06 16:43:58,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:43:58,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-06 16:43:58,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-01-06 16:43:58,736 INFO L87 Difference]: Start difference. First operand 74 states and 76 transitions. Second operand 21 states. [2021-01-06 16:43:59,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:43:59,265 INFO L93 Difference]: Finished difference Result 81 states and 83 transitions. [2021-01-06 16:43:59,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-01-06 16:43:59,266 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 40 [2021-01-06 16:43:59,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:43:59,267 INFO L225 Difference]: With dead ends: 81 [2021-01-06 16:43:59,267 INFO L226 Difference]: Without dead ends: 77 [2021-01-06 16:43:59,267 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 26 SyntacticMatches, 15 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-01-06 16:43:59,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-01-06 16:43:59,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 76. [2021-01-06 16:43:59,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2021-01-06 16:43:59,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 78 transitions. [2021-01-06 16:43:59,273 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 78 transitions. Word has length 40 [2021-01-06 16:43:59,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:43:59,273 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 78 transitions. [2021-01-06 16:43:59,273 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2021-01-06 16:43:59,273 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 78 transitions. [2021-01-06 16:43:59,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-01-06 16:43:59,274 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:43:59,274 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1] [2021-01-06 16:43:59,478 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-01-06 16:43:59,478 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:43:59,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:43:59,479 INFO L82 PathProgramCache]: Analyzing trace with hash -610250044, now seen corresponding path program 16 times [2021-01-06 16:43:59,480 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:43:59,480 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022256159] [2021-01-06 16:43:59,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:43:59,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:43:59,803 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:43:59,803 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022256159] [2021-01-06 16:43:59,803 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [897492810] [2021-01-06 16:43:59,803 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:43:59,848 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 16:43:59,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:43:59,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 37 conjunts are in the unsatisfiable core [2021-01-06 16:43:59,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:43:59,942 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:43:59,943 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:43:59,943 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2021-01-06 16:43:59,943 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059777623] [2021-01-06 16:43:59,943 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-06 16:43:59,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:43:59,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-06 16:43:59,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-01-06 16:43:59,944 INFO L87 Difference]: Start difference. First operand 76 states and 78 transitions. Second operand 21 states. [2021-01-06 16:44:00,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:44:00,560 INFO L93 Difference]: Finished difference Result 83 states and 85 transitions. [2021-01-06 16:44:00,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-01-06 16:44:00,561 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 40 [2021-01-06 16:44:00,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:44:00,562 INFO L225 Difference]: With dead ends: 83 [2021-01-06 16:44:00,562 INFO L226 Difference]: Without dead ends: 79 [2021-01-06 16:44:00,562 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-01-06 16:44:00,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-01-06 16:44:00,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 78. [2021-01-06 16:44:00,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2021-01-06 16:44:00,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 80 transitions. [2021-01-06 16:44:00,568 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 80 transitions. Word has length 40 [2021-01-06 16:44:00,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:44:00,569 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 80 transitions. [2021-01-06 16:44:00,569 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2021-01-06 16:44:00,569 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 80 transitions. [2021-01-06 16:44:00,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-01-06 16:44:00,569 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:44:00,569 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1] [2021-01-06 16:44:00,783 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-01-06 16:44:00,784 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:44:00,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:44:00,784 INFO L82 PathProgramCache]: Analyzing trace with hash 691201739, now seen corresponding path program 18 times [2021-01-06 16:44:00,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:44:00,785 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149177938] [2021-01-06 16:44:00,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:44:00,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:44:01,163 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:44:01,163 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149177938] [2021-01-06 16:44:01,163 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792436790] [2021-01-06 16:44:01,163 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 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 16:44:01,443 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2021-01-06 16:44:01,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:44:01,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 43 conjunts are in the unsatisfiable core [2021-01-06 16:44:01,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:44:01,644 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:44:01,644 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:44:01,644 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-01-06 16:44:01,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670299748] [2021-01-06 16:44:01,645 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-01-06 16:44:01,645 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:44:01,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-01-06 16:44:01,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2021-01-06 16:44:01,646 INFO L87 Difference]: Start difference. First operand 78 states and 80 transitions. Second operand 22 states. [2021-01-06 16:44:02,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:44:02,207 INFO L93 Difference]: Finished difference Result 85 states and 87 transitions. [2021-01-06 16:44:02,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-01-06 16:44:02,208 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 42 [2021-01-06 16:44:02,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:44:02,209 INFO L225 Difference]: With dead ends: 85 [2021-01-06 16:44:02,209 INFO L226 Difference]: Without dead ends: 81 [2021-01-06 16:44:02,210 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 38 SyntacticMatches, 5 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2021-01-06 16:44:02,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-01-06 16:44:02,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 80. [2021-01-06 16:44:02,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2021-01-06 16:44:02,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 82 transitions. [2021-01-06 16:44:02,215 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 82 transitions. Word has length 42 [2021-01-06 16:44:02,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:44:02,216 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 82 transitions. [2021-01-06 16:44:02,216 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2021-01-06 16:44:02,216 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 82 transitions. [2021-01-06 16:44:02,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-01-06 16:44:02,217 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:44:02,217 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1] [2021-01-06 16:44:02,420 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-01-06 16:44:02,421 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:44:02,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:44:02,422 INFO L82 PathProgramCache]: Analyzing trace with hash 2010570023, now seen corresponding path program 17 times [2021-01-06 16:44:02,422 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:44:02,422 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795356585] [2021-01-06 16:44:02,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:44:02,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:44:02,782 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:44:02,782 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795356585] [2021-01-06 16:44:02,783 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [894769523] [2021-01-06 16:44:02,783 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 16:44:04,062 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2021-01-06 16:44:04,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:44:04,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 54 conjunts are in the unsatisfiable core [2021-01-06 16:44:04,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:44:04,413 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:44:04,414 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:44:04,414 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-01-06 16:44:04,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515479371] [2021-01-06 16:44:04,414 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-01-06 16:44:04,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:44:04,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-01-06 16:44:04,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2021-01-06 16:44:04,415 INFO L87 Difference]: Start difference. First operand 80 states and 82 transitions. Second operand 22 states. [2021-01-06 16:44:05,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:44:05,140 INFO L93 Difference]: Finished difference Result 87 states and 89 transitions. [2021-01-06 16:44:05,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-01-06 16:44:05,141 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 42 [2021-01-06 16:44:05,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:44:05,142 INFO L225 Difference]: With dead ends: 87 [2021-01-06 16:44:05,142 INFO L226 Difference]: Without dead ends: 83 [2021-01-06 16:44:05,142 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 27 SyntacticMatches, 16 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2021-01-06 16:44:05,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-01-06 16:44:05,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 82. [2021-01-06 16:44:05,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2021-01-06 16:44:05,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 84 transitions. [2021-01-06 16:44:05,148 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 84 transitions. Word has length 42 [2021-01-06 16:44:05,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:44:05,148 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 84 transitions. [2021-01-06 16:44:05,148 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2021-01-06 16:44:05,148 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 84 transitions. [2021-01-06 16:44:05,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-01-06 16:44:05,149 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:44:05,149 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1] [2021-01-06 16:44:05,352 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-01-06 16:44:05,353 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:44:05,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:44:05,354 INFO L82 PathProgramCache]: Analyzing trace with hash -1422869904, now seen corresponding path program 19 times [2021-01-06 16:44:05,354 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:44:05,354 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762457972] [2021-01-06 16:44:05,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:44:05,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:44:05,810 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:44:05,811 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762457972] [2021-01-06 16:44:05,811 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1904123361] [2021-01-06 16:44:05,811 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 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 16:44:05,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:44:05,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 41 conjunts are in the unsatisfiable core [2021-01-06 16:44:05,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:44:05,951 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:44:05,951 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:44:05,951 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2021-01-06 16:44:05,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72754281] [2021-01-06 16:44:05,952 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-01-06 16:44:05,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:44:05,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-01-06 16:44:05,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2021-01-06 16:44:05,953 INFO L87 Difference]: Start difference. First operand 82 states and 84 transitions. Second operand 23 states. [2021-01-06 16:44:06,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:44:06,627 INFO L93 Difference]: Finished difference Result 89 states and 91 transitions. [2021-01-06 16:44:06,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-01-06 16:44:06,628 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 44 [2021-01-06 16:44:06,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:44:06,629 INFO L225 Difference]: With dead ends: 89 [2021-01-06 16:44:06,629 INFO L226 Difference]: Without dead ends: 85 [2021-01-06 16:44:06,629 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2021-01-06 16:44:06,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-01-06 16:44:06,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 84. [2021-01-06 16:44:06,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2021-01-06 16:44:06,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 86 transitions. [2021-01-06 16:44:06,634 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 86 transitions. Word has length 44 [2021-01-06 16:44:06,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:44:06,635 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 86 transitions. [2021-01-06 16:44:06,635 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2021-01-06 16:44:06,635 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 86 transitions. [2021-01-06 16:44:06,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-01-06 16:44:06,635 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:44:06,636 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1] [2021-01-06 16:44:06,838 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-01-06 16:44:06,839 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:44:06,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:44:06,839 INFO L82 PathProgramCache]: Analyzing trace with hash -527148342, now seen corresponding path program 18 times [2021-01-06 16:44:06,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:44:06,840 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78378337] [2021-01-06 16:44:06,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:44:06,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:44:07,276 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:44:07,276 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78378337] [2021-01-06 16:44:07,276 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [401357513] [2021-01-06 16:44:07,276 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 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 16:44:07,812 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 20 check-sat command(s) [2021-01-06 16:44:07,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:44:07,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 54 conjunts are in the unsatisfiable core [2021-01-06 16:44:07,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:44:08,227 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:44:08,227 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:44:08,227 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2021-01-06 16:44:08,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765558458] [2021-01-06 16:44:08,228 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-01-06 16:44:08,228 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:44:08,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-01-06 16:44:08,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2021-01-06 16:44:08,229 INFO L87 Difference]: Start difference. First operand 84 states and 86 transitions. Second operand 23 states. [2021-01-06 16:44:09,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:44:09,012 INFO L93 Difference]: Finished difference Result 91 states and 93 transitions. [2021-01-06 16:44:09,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-01-06 16:44:09,013 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 44 [2021-01-06 16:44:09,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:44:09,014 INFO L225 Difference]: With dead ends: 91 [2021-01-06 16:44:09,014 INFO L226 Difference]: Without dead ends: 87 [2021-01-06 16:44:09,015 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 31 SyntacticMatches, 14 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2021-01-06 16:44:09,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-01-06 16:44:09,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 86. [2021-01-06 16:44:09,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2021-01-06 16:44:09,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 88 transitions. [2021-01-06 16:44:09,019 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 88 transitions. Word has length 44 [2021-01-06 16:44:09,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:44:09,019 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 88 transitions. [2021-01-06 16:44:09,020 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2021-01-06 16:44:09,020 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 88 transitions. [2021-01-06 16:44:09,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-01-06 16:44:09,020 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:44:09,020 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1] [2021-01-06 16:44:09,221 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-01-06 16:44:09,221 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:44:09,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:44:09,222 INFO L82 PathProgramCache]: Analyzing trace with hash -1526187819, now seen corresponding path program 20 times [2021-01-06 16:44:09,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:44:09,223 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703254028] [2021-01-06 16:44:09,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:44:09,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:44:09,644 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:44:09,645 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703254028] [2021-01-06 16:44:09,645 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1146717560] [2021-01-06 16:44:09,645 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 16:44:09,699 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:44:09,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:44:09,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 43 conjunts are in the unsatisfiable core [2021-01-06 16:44:09,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:44:09,792 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:44:09,792 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:44:09,792 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2021-01-06 16:44:09,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664052861] [2021-01-06 16:44:09,793 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-01-06 16:44:09,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:44:09,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-01-06 16:44:09,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2021-01-06 16:44:09,794 INFO L87 Difference]: Start difference. First operand 86 states and 88 transitions. Second operand 24 states. [2021-01-06 16:44:10,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:44:10,468 INFO L93 Difference]: Finished difference Result 93 states and 95 transitions. [2021-01-06 16:44:10,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-01-06 16:44:10,469 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 46 [2021-01-06 16:44:10,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:44:10,470 INFO L225 Difference]: With dead ends: 93 [2021-01-06 16:44:10,471 INFO L226 Difference]: Without dead ends: 89 [2021-01-06 16:44:10,471 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2021-01-06 16:44:10,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-01-06 16:44:10,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 88. [2021-01-06 16:44:10,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2021-01-06 16:44:10,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 90 transitions. [2021-01-06 16:44:10,476 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 90 transitions. Word has length 46 [2021-01-06 16:44:10,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:44:10,476 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 90 transitions. [2021-01-06 16:44:10,476 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2021-01-06 16:44:10,476 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 90 transitions. [2021-01-06 16:44:10,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-01-06 16:44:10,477 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:44:10,477 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1] [2021-01-06 16:44:10,684 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:44:10,684 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:44:10,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:44:10,685 INFO L82 PathProgramCache]: Analyzing trace with hash 266927021, now seen corresponding path program 19 times [2021-01-06 16:44:10,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:44:10,686 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70387612] [2021-01-06 16:44:10,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:44:10,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:44:11,146 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:44:11,146 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70387612] [2021-01-06 16:44:11,147 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1690429217] [2021-01-06 16:44:11,147 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:44:11,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:44:11,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 43 conjunts are in the unsatisfiable core [2021-01-06 16:44:11,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:44:11,307 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:44:11,307 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:44:11,307 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2021-01-06 16:44:11,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358897167] [2021-01-06 16:44:11,308 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-01-06 16:44:11,308 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:44:11,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-01-06 16:44:11,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2021-01-06 16:44:11,309 INFO L87 Difference]: Start difference. First operand 88 states and 90 transitions. Second operand 24 states. [2021-01-06 16:44:12,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:44:12,162 INFO L93 Difference]: Finished difference Result 95 states and 97 transitions. [2021-01-06 16:44:12,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-01-06 16:44:12,163 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 46 [2021-01-06 16:44:12,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:44:12,164 INFO L225 Difference]: With dead ends: 95 [2021-01-06 16:44:12,164 INFO L226 Difference]: Without dead ends: 91 [2021-01-06 16:44:12,165 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2021-01-06 16:44:12,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-01-06 16:44:12,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 90. [2021-01-06 16:44:12,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2021-01-06 16:44:12,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 92 transitions. [2021-01-06 16:44:12,170 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 92 transitions. Word has length 46 [2021-01-06 16:44:12,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:44:12,170 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 92 transitions. [2021-01-06 16:44:12,170 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2021-01-06 16:44:12,170 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 92 transitions. [2021-01-06 16:44:12,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-01-06 16:44:12,171 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:44:12,171 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 1, 1, 1, 1, 1, 1] [2021-01-06 16:44:12,383 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:44:12,384 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:44:12,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:44:12,386 INFO L82 PathProgramCache]: Analyzing trace with hash -2030456326, now seen corresponding path program 21 times [2021-01-06 16:44:12,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:44:12,386 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586829651] [2021-01-06 16:44:12,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:44:12,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:44:12,885 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:44:12,886 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586829651] [2021-01-06 16:44:12,887 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [346935995] [2021-01-06 16:44:12,887 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 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 16:44:13,394 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2021-01-06 16:44:13,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:44:13,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 46 conjunts are in the unsatisfiable core [2021-01-06 16:44:13,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:44:13,525 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:44:13,525 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:44:13,525 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2021-01-06 16:44:13,526 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875813625] [2021-01-06 16:44:13,526 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-01-06 16:44:13,526 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:44:13,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-01-06 16:44:13,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2021-01-06 16:44:13,527 INFO L87 Difference]: Start difference. First operand 90 states and 92 transitions. Second operand 25 states. [2021-01-06 16:44:14,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:44:14,296 INFO L93 Difference]: Finished difference Result 97 states and 99 transitions. [2021-01-06 16:44:14,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-01-06 16:44:14,297 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 48 [2021-01-06 16:44:14,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:44:14,298 INFO L225 Difference]: With dead ends: 97 [2021-01-06 16:44:14,298 INFO L226 Difference]: Without dead ends: 93 [2021-01-06 16:44:14,299 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2021-01-06 16:44:14,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-01-06 16:44:14,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 92. [2021-01-06 16:44:14,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2021-01-06 16:44:14,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 94 transitions. [2021-01-06 16:44:14,311 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 94 transitions. Word has length 48 [2021-01-06 16:44:14,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:44:14,311 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 94 transitions. [2021-01-06 16:44:14,311 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2021-01-06 16:44:14,311 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 94 transitions. [2021-01-06 16:44:14,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-01-06 16:44:14,312 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:44:14,312 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 1, 1, 1, 1, 1, 1] [2021-01-06 16:44:14,516 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:44:14,517 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:44:14,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:44:14,517 INFO L82 PathProgramCache]: Analyzing trace with hash -1130827824, now seen corresponding path program 20 times [2021-01-06 16:44:14,518 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:44:14,518 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112834298] [2021-01-06 16:44:14,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:44:14,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:44:15,036 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:44:15,036 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112834298] [2021-01-06 16:44:15,037 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1335155782] [2021-01-06 16:44:15,037 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 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 16:44:15,092 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:44:15,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:44:15,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 45 conjunts are in the unsatisfiable core [2021-01-06 16:44:15,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:44:15,207 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:44:15,208 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:44:15,208 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2021-01-06 16:44:15,208 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712996653] [2021-01-06 16:44:15,208 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-01-06 16:44:15,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:44:15,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-01-06 16:44:15,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2021-01-06 16:44:15,209 INFO L87 Difference]: Start difference. First operand 92 states and 94 transitions. Second operand 25 states. [2021-01-06 16:44:16,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:44:16,114 INFO L93 Difference]: Finished difference Result 99 states and 101 transitions. [2021-01-06 16:44:16,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-01-06 16:44:16,115 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 48 [2021-01-06 16:44:16,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:44:16,115 INFO L225 Difference]: With dead ends: 99 [2021-01-06 16:44:16,116 INFO L226 Difference]: Without dead ends: 95 [2021-01-06 16:44:16,116 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2021-01-06 16:44:16,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-01-06 16:44:16,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 94. [2021-01-06 16:44:16,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2021-01-06 16:44:16,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 96 transitions. [2021-01-06 16:44:16,121 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 96 transitions. Word has length 48 [2021-01-06 16:44:16,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:44:16,121 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 96 transitions. [2021-01-06 16:44:16,122 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2021-01-06 16:44:16,122 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 96 transitions. [2021-01-06 16:44:16,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-01-06 16:44:16,122 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:44:16,122 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1] [2021-01-06 16:44:16,322 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-01-06 16:44:16,323 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:44:16,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:44:16,324 INFO L82 PathProgramCache]: Analyzing trace with hash -1301187105, now seen corresponding path program 22 times [2021-01-06 16:44:16,324 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:44:16,324 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076843100] [2021-01-06 16:44:16,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:44:16,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:44:16,820 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:44:16,820 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076843100] [2021-01-06 16:44:16,820 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [297556509] [2021-01-06 16:44:16,821 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 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 16:44:16,874 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 16:44:16,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:44:16,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 47 conjunts are in the unsatisfiable core [2021-01-06 16:44:16,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:44:16,974 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:44:16,975 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:44:16,975 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2021-01-06 16:44:16,975 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340147144] [2021-01-06 16:44:16,976 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-01-06 16:44:16,976 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:44:16,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-01-06 16:44:16,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=578, Unknown=0, NotChecked=0, Total=650 [2021-01-06 16:44:16,977 INFO L87 Difference]: Start difference. First operand 94 states and 96 transitions. Second operand 26 states. [2021-01-06 16:44:17,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:44:17,746 INFO L93 Difference]: Finished difference Result 101 states and 103 transitions. [2021-01-06 16:44:17,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-01-06 16:44:17,747 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 50 [2021-01-06 16:44:17,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:44:17,748 INFO L225 Difference]: With dead ends: 101 [2021-01-06 16:44:17,749 INFO L226 Difference]: Without dead ends: 97 [2021-01-06 16:44:17,750 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=72, Invalid=578, Unknown=0, NotChecked=0, Total=650 [2021-01-06 16:44:17,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-01-06 16:44:17,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 96. [2021-01-06 16:44:17,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2021-01-06 16:44:17,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 98 transitions. [2021-01-06 16:44:17,756 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 98 transitions. Word has length 50 [2021-01-06 16:44:17,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:44:17,756 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 98 transitions. [2021-01-06 16:44:17,756 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2021-01-06 16:44:17,756 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 98 transitions. [2021-01-06 16:44:17,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-01-06 16:44:17,757 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:44:17,757 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1] [2021-01-06 16:44:17,958 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:44:17,959 INFO L429 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:44:17,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:44:17,959 INFO L82 PathProgramCache]: Analyzing trace with hash -48470221, now seen corresponding path program 21 times [2021-01-06 16:44:17,960 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:44:17,960 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394990263] [2021-01-06 16:44:17,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:44:17,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:44:18,444 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:44:18,445 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394990263] [2021-01-06 16:44:18,445 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [417223972] [2021-01-06 16:44:18,445 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 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:44:18,921 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 23 check-sat command(s) [2021-01-06 16:44:18,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:44:18,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 59 conjunts are in the unsatisfiable core [2021-01-06 16:44:18,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:44:19,143 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:44:19,144 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:44:19,144 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2021-01-06 16:44:19,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123882818] [2021-01-06 16:44:19,144 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-01-06 16:44:19,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:44:19,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-01-06 16:44:19,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=578, Unknown=0, NotChecked=0, Total=650 [2021-01-06 16:44:19,146 INFO L87 Difference]: Start difference. First operand 96 states and 98 transitions. Second operand 26 states. [2021-01-06 16:44:20,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:44:20,118 INFO L93 Difference]: Finished difference Result 103 states and 105 transitions. [2021-01-06 16:44:20,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-01-06 16:44:20,121 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 50 [2021-01-06 16:44:20,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:44:20,121 INFO L225 Difference]: With dead ends: 103 [2021-01-06 16:44:20,121 INFO L226 Difference]: Without dead ends: 99 [2021-01-06 16:44:20,122 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 44 SyntacticMatches, 7 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=72, Invalid=578, Unknown=0, NotChecked=0, Total=650 [2021-01-06 16:44:20,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-01-06 16:44:20,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 98. [2021-01-06 16:44:20,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2021-01-06 16:44:20,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 100 transitions. [2021-01-06 16:44:20,126 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 100 transitions. Word has length 50 [2021-01-06 16:44:20,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:44:20,126 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 100 transitions. [2021-01-06 16:44:20,126 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2021-01-06 16:44:20,126 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 100 transitions. [2021-01-06 16:44:20,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-01-06 16:44:20,127 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:44:20,127 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 1, 1, 1, 1, 1, 1] [2021-01-06 16:44:20,330 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:44:20,331 INFO L429 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:44:20,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:44:20,331 INFO L82 PathProgramCache]: Analyzing trace with hash -553134972, now seen corresponding path program 23 times [2021-01-06 16:44:20,332 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:44:20,332 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587502670] [2021-01-06 16:44:20,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:44:20,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:44:20,879 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:44:20,880 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587502670] [2021-01-06 16:44:20,880 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1556519717] [2021-01-06 16:44:20,880 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 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:44:26,268 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2021-01-06 16:44:26,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:44:26,273 WARN L261 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 71 conjunts are in the unsatisfiable core [2021-01-06 16:44:26,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:44:26,933 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:44:26,933 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:44:26,934 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2021-01-06 16:44:26,934 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565032446] [2021-01-06 16:44:26,934 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-01-06 16:44:26,934 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:44:26,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-01-06 16:44:26,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2021-01-06 16:44:26,935 INFO L87 Difference]: Start difference. First operand 98 states and 100 transitions. Second operand 27 states. [2021-01-06 16:44:27,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:44:27,847 INFO L93 Difference]: Finished difference Result 105 states and 107 transitions. [2021-01-06 16:44:27,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-01-06 16:44:27,848 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 52 [2021-01-06 16:44:27,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:44:27,849 INFO L225 Difference]: With dead ends: 105 [2021-01-06 16:44:27,849 INFO L226 Difference]: Without dead ends: 101 [2021-01-06 16:44:27,850 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 30 SyntacticMatches, 23 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2021-01-06 16:44:27,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-01-06 16:44:27,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 100. [2021-01-06 16:44:27,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2021-01-06 16:44:27,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 102 transitions. [2021-01-06 16:44:27,854 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 102 transitions. Word has length 52 [2021-01-06 16:44:27,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:44:27,854 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 102 transitions. [2021-01-06 16:44:27,855 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2021-01-06 16:44:27,855 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 102 transitions. [2021-01-06 16:44:27,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-01-06 16:44:27,855 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:44:27,855 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 1, 1, 1, 1, 1, 1] [2021-01-06 16:44:28,055 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-01-06 16:44:28,056 INFO L429 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:44:28,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:44:28,057 INFO L82 PathProgramCache]: Analyzing trace with hash 715100630, now seen corresponding path program 22 times [2021-01-06 16:44:28,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:44:28,057 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936899927] [2021-01-06 16:44:28,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:44:28,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:44:28,589 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:44:28,590 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936899927] [2021-01-06 16:44:28,590 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [10318317] [2021-01-06 16:44:28,590 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 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:44:28,649 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 16:44:28,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:44:28,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 49 conjunts are in the unsatisfiable core [2021-01-06 16:44:28,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:44:28,756 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:44:28,756 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:44:28,756 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2021-01-06 16:44:28,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302542389] [2021-01-06 16:44:28,757 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-01-06 16:44:28,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:44:28,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-01-06 16:44:28,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2021-01-06 16:44:28,758 INFO L87 Difference]: Start difference. First operand 100 states and 102 transitions. Second operand 27 states. [2021-01-06 16:44:29,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:44:29,891 INFO L93 Difference]: Finished difference Result 107 states and 109 transitions. [2021-01-06 16:44:29,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-01-06 16:44:29,893 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 52 [2021-01-06 16:44:29,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:44:29,894 INFO L225 Difference]: With dead ends: 107 [2021-01-06 16:44:29,894 INFO L226 Difference]: Without dead ends: 103 [2021-01-06 16:44:29,895 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2021-01-06 16:44:29,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-01-06 16:44:29,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 102. [2021-01-06 16:44:29,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2021-01-06 16:44:29,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 104 transitions. [2021-01-06 16:44:29,900 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 104 transitions. Word has length 52 [2021-01-06 16:44:29,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:44:29,901 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 104 transitions. [2021-01-06 16:44:29,901 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2021-01-06 16:44:29,901 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 104 transitions. [2021-01-06 16:44:29,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-01-06 16:44:29,901 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:44:29,901 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 1, 1, 1, 1, 1, 1] [2021-01-06 16:44:30,102 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-01-06 16:44:30,102 INFO L429 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:44:30,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:44:30,103 INFO L82 PathProgramCache]: Analyzing trace with hash 1065426409, now seen corresponding path program 24 times [2021-01-06 16:44:30,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:44:30,103 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796977560] [2021-01-06 16:44:30,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:44:30,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:44:30,674 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:44:30,674 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796977560] [2021-01-06 16:44:30,674 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [885270953] [2021-01-06 16:44:30,675 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 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:44:31,766 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2021-01-06 16:44:31,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:44:31,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 52 conjunts are in the unsatisfiable core [2021-01-06 16:44:31,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:44:31,939 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:44:31,940 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:44:31,940 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2021-01-06 16:44:31,940 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433511338] [2021-01-06 16:44:31,940 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-01-06 16:44:31,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:44:31,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-01-06 16:44:31,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=678, Unknown=0, NotChecked=0, Total=756 [2021-01-06 16:44:31,941 INFO L87 Difference]: Start difference. First operand 102 states and 104 transitions. Second operand 28 states. [2021-01-06 16:44:32,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:44:32,951 INFO L93 Difference]: Finished difference Result 109 states and 111 transitions. [2021-01-06 16:44:32,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-01-06 16:44:32,952 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 54 [2021-01-06 16:44:32,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:44:32,953 INFO L225 Difference]: With dead ends: 109 [2021-01-06 16:44:32,953 INFO L226 Difference]: Without dead ends: 105 [2021-01-06 16:44:32,954 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 53 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=78, Invalid=678, Unknown=0, NotChecked=0, Total=756 [2021-01-06 16:44:32,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-01-06 16:44:32,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 104. [2021-01-06 16:44:32,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2021-01-06 16:44:32,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 106 transitions. [2021-01-06 16:44:32,960 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 106 transitions. Word has length 54 [2021-01-06 16:44:32,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:44:32,961 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 106 transitions. [2021-01-06 16:44:32,961 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2021-01-06 16:44:32,961 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 106 transitions. [2021-01-06 16:44:32,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-01-06 16:44:32,961 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:44:32,962 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 1, 1, 1, 1, 1, 1] [2021-01-06 16:44:33,166 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-01-06 16:44:33,166 INFO L429 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:44:33,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:44:33,167 INFO L82 PathProgramCache]: Analyzing trace with hash 67280825, now seen corresponding path program 23 times [2021-01-06 16:44:33,167 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:44:33,168 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405390096] [2021-01-06 16:44:33,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:44:33,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:44:33,727 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:44:33,728 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405390096] [2021-01-06 16:44:33,728 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [465823317] [2021-01-06 16:44:33,728 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 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:44:36,505 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2021-01-06 16:44:36,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:44:36,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 66 conjunts are in the unsatisfiable core [2021-01-06 16:44:36,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:44:37,004 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:44:37,005 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:44:37,005 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2021-01-06 16:44:37,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317607030] [2021-01-06 16:44:37,006 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-01-06 16:44:37,006 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:44:37,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-01-06 16:44:37,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=678, Unknown=0, NotChecked=0, Total=756 [2021-01-06 16:44:37,008 INFO L87 Difference]: Start difference. First operand 104 states and 106 transitions. Second operand 28 states. [2021-01-06 16:44:38,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:44:38,078 INFO L93 Difference]: Finished difference Result 111 states and 113 transitions. [2021-01-06 16:44:38,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-01-06 16:44:38,079 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 54 [2021-01-06 16:44:38,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:44:38,080 INFO L225 Difference]: With dead ends: 111 [2021-01-06 16:44:38,080 INFO L226 Difference]: Without dead ends: 107 [2021-01-06 16:44:38,080 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 39 SyntacticMatches, 16 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=78, Invalid=678, Unknown=0, NotChecked=0, Total=756 [2021-01-06 16:44:38,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-01-06 16:44:38,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 106. [2021-01-06 16:44:38,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2021-01-06 16:44:38,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 108 transitions. [2021-01-06 16:44:38,097 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 108 transitions. Word has length 54 [2021-01-06 16:44:38,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:44:38,098 INFO L481 AbstractCegarLoop]: Abstraction has 106 states and 108 transitions. [2021-01-06 16:44:38,098 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2021-01-06 16:44:38,098 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 108 transitions. [2021-01-06 16:44:38,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-01-06 16:44:38,099 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:44:38,099 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 1, 1, 1, 1, 1, 1] [2021-01-06 16:44:38,303 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:44:38,303 INFO L429 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:44:38,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:44:38,304 INFO L82 PathProgramCache]: Analyzing trace with hash 1724752398, now seen corresponding path program 25 times [2021-01-06 16:44:38,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:44:38,305 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065137436] [2021-01-06 16:44:38,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:44:38,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:44:38,901 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:44:38,902 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065137436] [2021-01-06 16:44:38,902 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1098011585] [2021-01-06 16:44:38,902 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 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:44:38,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:44:38,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 53 conjunts are in the unsatisfiable core [2021-01-06 16:44:38,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:44:39,071 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:44:39,072 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:44:39,072 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2021-01-06 16:44:39,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167170474] [2021-01-06 16:44:39,073 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-01-06 16:44:39,073 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:44:39,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-01-06 16:44:39,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=731, Unknown=0, NotChecked=0, Total=812 [2021-01-06 16:44:39,074 INFO L87 Difference]: Start difference. First operand 106 states and 108 transitions. Second operand 29 states. [2021-01-06 16:44:40,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:44:40,138 INFO L93 Difference]: Finished difference Result 113 states and 115 transitions. [2021-01-06 16:44:40,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-01-06 16:44:40,139 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 56 [2021-01-06 16:44:40,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:44:40,140 INFO L225 Difference]: With dead ends: 113 [2021-01-06 16:44:40,140 INFO L226 Difference]: Without dead ends: 109 [2021-01-06 16:44:40,141 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=81, Invalid=731, Unknown=0, NotChecked=0, Total=812 [2021-01-06 16:44:40,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-01-06 16:44:40,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 108. [2021-01-06 16:44:40,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2021-01-06 16:44:40,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 110 transitions. [2021-01-06 16:44:40,148 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 110 transitions. Word has length 56 [2021-01-06 16:44:40,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:44:40,148 INFO L481 AbstractCegarLoop]: Abstraction has 108 states and 110 transitions. [2021-01-06 16:44:40,148 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2021-01-06 16:44:40,148 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 110 transitions. [2021-01-06 16:44:40,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-01-06 16:44:40,149 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:44:40,149 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 1, 1, 1, 1, 1, 1] [2021-01-06 16:44:40,362 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:44:40,363 INFO L429 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:44:40,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:44:40,363 INFO L82 PathProgramCache]: Analyzing trace with hash 282706140, now seen corresponding path program 24 times [2021-01-06 16:44:40,364 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:44:40,364 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751331615] [2021-01-06 16:44:40,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:44:40,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:44:41,043 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:44:41,044 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751331615] [2021-01-06 16:44:41,044 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [229508443] [2021-01-06 16:44:41,044 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 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:44:42,687 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 26 check-sat command(s) [2021-01-06 16:44:42,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:44:42,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 63 conjunts are in the unsatisfiable core [2021-01-06 16:44:42,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:44:43,131 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:44:43,132 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:44:43,132 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2021-01-06 16:44:43,132 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558805579] [2021-01-06 16:44:43,133 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-01-06 16:44:43,133 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:44:43,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-01-06 16:44:43,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=731, Unknown=0, NotChecked=0, Total=812 [2021-01-06 16:44:43,134 INFO L87 Difference]: Start difference. First operand 108 states and 110 transitions. Second operand 29 states. [2021-01-06 16:44:44,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:44:44,446 INFO L93 Difference]: Finished difference Result 115 states and 117 transitions. [2021-01-06 16:44:44,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-01-06 16:44:44,447 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 56 [2021-01-06 16:44:44,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:44:44,448 INFO L225 Difference]: With dead ends: 115 [2021-01-06 16:44:44,448 INFO L226 Difference]: Without dead ends: 111 [2021-01-06 16:44:44,448 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 46 SyntacticMatches, 11 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=81, Invalid=731, Unknown=0, NotChecked=0, Total=812 [2021-01-06 16:44:44,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-01-06 16:44:44,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 110. [2021-01-06 16:44:44,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2021-01-06 16:44:44,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 112 transitions. [2021-01-06 16:44:44,455 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 112 transitions. Word has length 56 [2021-01-06 16:44:44,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:44:44,455 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 112 transitions. [2021-01-06 16:44:44,455 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2021-01-06 16:44:44,455 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 112 transitions. [2021-01-06 16:44:44,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-06 16:44:44,456 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:44:44,456 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 1, 1, 1, 1, 1, 1] [2021-01-06 16:44:44,660 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-01-06 16:44:44,661 INFO L429 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:44:44,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:44:44,661 INFO L82 PathProgramCache]: Analyzing trace with hash -318131981, now seen corresponding path program 26 times [2021-01-06 16:44:44,662 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:44:44,662 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462853302] [2021-01-06 16:44:44,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:44:44,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:44:45,393 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:44:45,394 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462853302] [2021-01-06 16:44:45,394 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1303356621] [2021-01-06 16:44:45,394 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 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:44:45,445 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:44:45,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:44:45,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 55 conjunts are in the unsatisfiable core [2021-01-06 16:44:45,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:44:45,581 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:44:45,581 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:44:45,581 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2021-01-06 16:44:45,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181163823] [2021-01-06 16:44:45,582 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-01-06 16:44:45,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:44:45,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-01-06 16:44:45,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=786, Unknown=0, NotChecked=0, Total=870 [2021-01-06 16:44:45,583 INFO L87 Difference]: Start difference. First operand 110 states and 112 transitions. Second operand 30 states. [2021-01-06 16:44:46,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:44:46,768 INFO L93 Difference]: Finished difference Result 117 states and 119 transitions. [2021-01-06 16:44:46,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-01-06 16:44:46,768 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 58 [2021-01-06 16:44:46,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:44:46,770 INFO L225 Difference]: With dead ends: 117 [2021-01-06 16:44:46,770 INFO L226 Difference]: Without dead ends: 113 [2021-01-06 16:44:46,770 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=84, Invalid=786, Unknown=0, NotChecked=0, Total=870 [2021-01-06 16:44:46,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-01-06 16:44:46,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 112. [2021-01-06 16:44:46,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2021-01-06 16:44:46,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 114 transitions. [2021-01-06 16:44:46,775 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 114 transitions. Word has length 58 [2021-01-06 16:44:46,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:44:46,776 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 114 transitions. [2021-01-06 16:44:46,776 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2021-01-06 16:44:46,776 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 114 transitions. [2021-01-06 16:44:46,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-06 16:44:46,776 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:44:46,777 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 1, 1, 1, 1, 1, 1] [2021-01-06 16:44:46,982 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:44:46,983 INFO L429 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:44:46,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:44:46,984 INFO L82 PathProgramCache]: Analyzing trace with hash 1148003647, now seen corresponding path program 25 times [2021-01-06 16:44:46,984 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:44:46,984 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120643712] [2021-01-06 16:44:46,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:44:47,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:44:47,660 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:44:47,660 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120643712] [2021-01-06 16:44:47,660 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [223720617] [2021-01-06 16:44:47,661 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 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:44:47,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:44:47,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 55 conjunts are in the unsatisfiable core [2021-01-06 16:44:47,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:44:47,853 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:44:47,854 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:44:47,854 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2021-01-06 16:44:47,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163951716] [2021-01-06 16:44:47,855 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-01-06 16:44:47,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:44:47,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-01-06 16:44:47,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=786, Unknown=0, NotChecked=0, Total=870 [2021-01-06 16:44:47,856 INFO L87 Difference]: Start difference. First operand 112 states and 114 transitions. Second operand 30 states. [2021-01-06 16:44:49,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:44:49,241 INFO L93 Difference]: Finished difference Result 119 states and 121 transitions. [2021-01-06 16:44:49,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-01-06 16:44:49,241 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 58 [2021-01-06 16:44:49,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:44:49,242 INFO L225 Difference]: With dead ends: 119 [2021-01-06 16:44:49,242 INFO L226 Difference]: Without dead ends: 115 [2021-01-06 16:44:49,243 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=84, Invalid=786, Unknown=0, NotChecked=0, Total=870 [2021-01-06 16:44:49,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-01-06 16:44:49,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 114. [2021-01-06 16:44:49,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2021-01-06 16:44:49,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 116 transitions. [2021-01-06 16:44:49,247 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 116 transitions. Word has length 58 [2021-01-06 16:44:49,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:44:49,247 INFO L481 AbstractCegarLoop]: Abstraction has 114 states and 116 transitions. [2021-01-06 16:44:49,247 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2021-01-06 16:44:49,247 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 116 transitions. [2021-01-06 16:44:49,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-01-06 16:44:49,247 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:44:49,248 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 1, 1, 1, 1, 1, 1] [2021-01-06 16:44:49,448 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-01-06 16:44:49,448 INFO L429 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:44:49,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:44:49,449 INFO L82 PathProgramCache]: Analyzing trace with hash -729965928, now seen corresponding path program 27 times [2021-01-06 16:44:49,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:44:49,450 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918995196] [2021-01-06 16:44:49,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:44:49,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:44:50,224 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:44:50,224 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918995196] [2021-01-06 16:44:50,225 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [733068670] [2021-01-06 16:44:50,225 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 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:44:50,864 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2021-01-06 16:44:50,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:44:50,868 WARN L261 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 76 conjunts are in the unsatisfiable core [2021-01-06 16:44:50,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:44:51,470 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:44:51,470 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:44:51,471 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2021-01-06 16:44:51,471 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052349388] [2021-01-06 16:44:51,472 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-01-06 16:44:51,472 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:44:51,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-01-06 16:44:51,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=843, Unknown=0, NotChecked=0, Total=930 [2021-01-06 16:44:51,473 INFO L87 Difference]: Start difference. First operand 114 states and 116 transitions. Second operand 31 states. [2021-01-06 16:44:52,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:44:52,538 INFO L93 Difference]: Finished difference Result 121 states and 123 transitions. [2021-01-06 16:44:52,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-01-06 16:44:52,538 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 60 [2021-01-06 16:44:52,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:44:52,539 INFO L225 Difference]: With dead ends: 121 [2021-01-06 16:44:52,540 INFO L226 Difference]: Without dead ends: 117 [2021-01-06 16:44:52,540 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 47 SyntacticMatches, 14 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=87, Invalid=843, Unknown=0, NotChecked=0, Total=930 [2021-01-06 16:44:52,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-01-06 16:44:52,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 116. [2021-01-06 16:44:52,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2021-01-06 16:44:52,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 118 transitions. [2021-01-06 16:44:52,547 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 118 transitions. Word has length 60 [2021-01-06 16:44:52,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:44:52,547 INFO L481 AbstractCegarLoop]: Abstraction has 116 states and 118 transitions. [2021-01-06 16:44:52,548 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2021-01-06 16:44:52,548 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 118 transitions. [2021-01-06 16:44:52,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-01-06 16:44:52,548 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:44:52,549 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 1, 1, 1, 1, 1, 1] [2021-01-06 16:44:52,753 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-01-06 16:44:52,754 INFO L429 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:44:52,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:44:52,755 INFO L82 PathProgramCache]: Analyzing trace with hash -524747550, now seen corresponding path program 26 times [2021-01-06 16:44:52,755 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:44:52,755 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808371987] [2021-01-06 16:44:52,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:44:52,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:44:53,563 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:44:53,564 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808371987] [2021-01-06 16:44:53,564 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [616869023] [2021-01-06 16:44:53,564 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 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:44:53,619 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:44:53,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:44:53,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 57 conjunts are in the unsatisfiable core [2021-01-06 16:44:53,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:44:53,751 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:44:53,751 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:44:53,751 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2021-01-06 16:44:53,752 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969089109] [2021-01-06 16:44:53,752 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-01-06 16:44:53,752 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:44:53,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-01-06 16:44:53,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=843, Unknown=0, NotChecked=0, Total=930 [2021-01-06 16:44:53,753 INFO L87 Difference]: Start difference. First operand 116 states and 118 transitions. Second operand 31 states. [2021-01-06 16:44:55,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:44:55,318 INFO L93 Difference]: Finished difference Result 123 states and 125 transitions. [2021-01-06 16:44:55,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-01-06 16:44:55,318 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 60 [2021-01-06 16:44:55,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:44:55,320 INFO L225 Difference]: With dead ends: 123 [2021-01-06 16:44:55,320 INFO L226 Difference]: Without dead ends: 119 [2021-01-06 16:44:55,321 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=87, Invalid=843, Unknown=0, NotChecked=0, Total=930 [2021-01-06 16:44:55,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-01-06 16:44:55,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 118. [2021-01-06 16:44:55,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2021-01-06 16:44:55,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 120 transitions. [2021-01-06 16:44:55,328 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 120 transitions. Word has length 60 [2021-01-06 16:44:55,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:44:55,328 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 120 transitions. [2021-01-06 16:44:55,328 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2021-01-06 16:44:55,328 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 120 transitions. [2021-01-06 16:44:55,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-01-06 16:44:55,329 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:44:55,329 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 1, 1, 1, 1, 1, 1] [2021-01-06 16:44:55,543 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-01-06 16:44:55,543 INFO L429 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:44:55,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:44:55,544 INFO L82 PathProgramCache]: Analyzing trace with hash -1365397763, now seen corresponding path program 28 times [2021-01-06 16:44:55,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:44:55,545 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501671875] [2021-01-06 16:44:55,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:44:55,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:44:56,301 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:44:56,301 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501671875] [2021-01-06 16:44:56,301 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1176050797] [2021-01-06 16:44:56,301 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 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:44:56,355 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 16:44:56,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:44:56,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 59 conjunts are in the unsatisfiable core [2021-01-06 16:44:56,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:44:56,484 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:44:56,484 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:44:56,484 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2021-01-06 16:44:56,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488686400] [2021-01-06 16:44:56,485 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-01-06 16:44:56,485 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:44:56,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-01-06 16:44:56,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=902, Unknown=0, NotChecked=0, Total=992 [2021-01-06 16:44:56,486 INFO L87 Difference]: Start difference. First operand 118 states and 120 transitions. Second operand 32 states. [2021-01-06 16:44:57,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:44:57,859 INFO L93 Difference]: Finished difference Result 125 states and 127 transitions. [2021-01-06 16:44:57,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-01-06 16:44:57,860 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 62 [2021-01-06 16:44:57,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:44:57,861 INFO L225 Difference]: With dead ends: 125 [2021-01-06 16:44:57,861 INFO L226 Difference]: Without dead ends: 121 [2021-01-06 16:44:57,861 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=90, Invalid=902, Unknown=0, NotChecked=0, Total=992 [2021-01-06 16:44:57,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-01-06 16:44:57,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 120. [2021-01-06 16:44:57,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2021-01-06 16:44:57,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 122 transitions. [2021-01-06 16:44:57,867 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 122 transitions. Word has length 62 [2021-01-06 16:44:57,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:44:57,868 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 122 transitions. [2021-01-06 16:44:57,868 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2021-01-06 16:44:57,868 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 122 transitions. [2021-01-06 16:44:57,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-01-06 16:44:57,868 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:44:57,869 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 1, 1, 1, 1, 1, 1] [2021-01-06 16:44:58,082 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-01-06 16:44:58,083 INFO L429 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:44:58,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:44:58,083 INFO L82 PathProgramCache]: Analyzing trace with hash -1720879163, now seen corresponding path program 27 times [2021-01-06 16:44:58,084 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:44:58,084 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921237738] [2021-01-06 16:44:58,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:44:58,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:44:58,953 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:44:58,954 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921237738] [2021-01-06 16:44:58,954 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1802150211] [2021-01-06 16:44:58,954 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 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:44:59,972 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 29 check-sat command(s) [2021-01-06 16:44:59,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:44:59,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 69 conjunts are in the unsatisfiable core [2021-01-06 16:44:59,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:45:00,584 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:45:00,585 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:45:00,585 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2021-01-06 16:45:00,585 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849466943] [2021-01-06 16:45:00,585 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-01-06 16:45:00,585 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:45:00,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-01-06 16:45:00,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=902, Unknown=0, NotChecked=0, Total=992 [2021-01-06 16:45:00,586 INFO L87 Difference]: Start difference. First operand 120 states and 122 transitions. Second operand 32 states. [2021-01-06 16:45:02,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:45:02,279 INFO L93 Difference]: Finished difference Result 127 states and 129 transitions. [2021-01-06 16:45:02,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-01-06 16:45:02,280 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 62 [2021-01-06 16:45:02,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:45:02,282 INFO L225 Difference]: With dead ends: 127 [2021-01-06 16:45:02,282 INFO L226 Difference]: Without dead ends: 123 [2021-01-06 16:45:02,282 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 52 SyntacticMatches, 11 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=90, Invalid=902, Unknown=0, NotChecked=0, Total=992 [2021-01-06 16:45:02,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-01-06 16:45:02,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 122. [2021-01-06 16:45:02,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2021-01-06 16:45:02,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 124 transitions. [2021-01-06 16:45:02,288 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 124 transitions. Word has length 62 [2021-01-06 16:45:02,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:45:02,288 INFO L481 AbstractCegarLoop]: Abstraction has 122 states and 124 transitions. [2021-01-06 16:45:02,288 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2021-01-06 16:45:02,288 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 124 transitions. [2021-01-06 16:45:02,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-01-06 16:45:02,288 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:45:02,289 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 1, 1, 1, 1, 1, 1] [2021-01-06 16:45:02,489 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:45:02,490 INFO L429 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:45:02,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:45:02,490 INFO L82 PathProgramCache]: Analyzing trace with hash -2130035166, now seen corresponding path program 29 times [2021-01-06 16:45:02,491 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:45:02,491 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279939800] [2021-01-06 16:45:02,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:45:02,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:45:03,372 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:45:03,372 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279939800] [2021-01-06 16:45:03,372 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1921410564] [2021-01-06 16:45:03,373 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 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:45:13,353 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2021-01-06 16:45:13,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:45:13,360 WARN L261 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 88 conjunts are in the unsatisfiable core [2021-01-06 16:45:13,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:45:14,325 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:45:14,326 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:45:14,326 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2021-01-06 16:45:14,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769237058] [2021-01-06 16:45:14,327 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-01-06 16:45:14,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:45:14,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-01-06 16:45:14,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=963, Unknown=0, NotChecked=0, Total=1056 [2021-01-06 16:45:14,327 INFO L87 Difference]: Start difference. First operand 122 states and 124 transitions. Second operand 33 states. [2021-01-06 16:45:15,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:45:15,842 INFO L93 Difference]: Finished difference Result 129 states and 131 transitions. [2021-01-06 16:45:15,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-01-06 16:45:15,842 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 64 [2021-01-06 16:45:15,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:45:15,844 INFO L225 Difference]: With dead ends: 129 [2021-01-06 16:45:15,844 INFO L226 Difference]: Without dead ends: 125 [2021-01-06 16:45:15,844 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 37 SyntacticMatches, 28 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=93, Invalid=963, Unknown=0, NotChecked=0, Total=1056 [2021-01-06 16:45:15,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-01-06 16:45:15,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 124. [2021-01-06 16:45:15,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2021-01-06 16:45:15,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 126 transitions. [2021-01-06 16:45:15,850 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 126 transitions. Word has length 64 [2021-01-06 16:45:15,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:45:15,851 INFO L481 AbstractCegarLoop]: Abstraction has 124 states and 126 transitions. [2021-01-06 16:45:15,851 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2021-01-06 16:45:15,851 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 126 transitions. [2021-01-06 16:45:15,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-01-06 16:45:15,851 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:45:15,851 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 1, 1, 1, 1, 1, 1] [2021-01-06 16:45:16,052 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-01-06 16:45:16,052 INFO L429 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:45:16,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:45:16,053 INFO L82 PathProgramCache]: Analyzing trace with hash -152123928, now seen corresponding path program 28 times [2021-01-06 16:45:16,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:45:16,053 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062115722] [2021-01-06 16:45:16,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:45:16,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:45:16,959 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:45:16,959 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062115722] [2021-01-06 16:45:16,959 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291841415] [2021-01-06 16:45:16,959 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 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:45:17,019 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 16:45:17,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:45:17,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 61 conjunts are in the unsatisfiable core [2021-01-06 16:45:17,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:45:17,166 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:45:17,167 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:45:17,167 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2021-01-06 16:45:17,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293077107] [2021-01-06 16:45:17,167 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-01-06 16:45:17,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:45:17,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-01-06 16:45:17,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=963, Unknown=0, NotChecked=0, Total=1056 [2021-01-06 16:45:17,168 INFO L87 Difference]: Start difference. First operand 124 states and 126 transitions. Second operand 33 states. [2021-01-06 16:45:18,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:45:18,908 INFO L93 Difference]: Finished difference Result 131 states and 133 transitions. [2021-01-06 16:45:18,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-01-06 16:45:18,909 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 64 [2021-01-06 16:45:18,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:45:18,910 INFO L225 Difference]: With dead ends: 131 [2021-01-06 16:45:18,910 INFO L226 Difference]: Without dead ends: 127 [2021-01-06 16:45:18,910 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=93, Invalid=963, Unknown=0, NotChecked=0, Total=1056 [2021-01-06 16:45:18,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-01-06 16:45:18,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 126. [2021-01-06 16:45:18,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2021-01-06 16:45:18,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 128 transitions. [2021-01-06 16:45:18,918 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 128 transitions. Word has length 64 [2021-01-06 16:45:18,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:45:18,918 INFO L481 AbstractCegarLoop]: Abstraction has 126 states and 128 transitions. [2021-01-06 16:45:18,918 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2021-01-06 16:45:18,918 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 128 transitions. [2021-01-06 16:45:18,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-01-06 16:45:18,919 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:45:18,919 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 1, 1, 1, 1, 1, 1] [2021-01-06 16:45:19,132 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:45:19,133 INFO L429 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:45:19,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:45:19,133 INFO L82 PathProgramCache]: Analyzing trace with hash 1787795463, now seen corresponding path program 30 times [2021-01-06 16:45:19,134 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:45:19,134 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135441962] [2021-01-06 16:45:19,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:45:19,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:45:19,978 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:45:19,979 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135441962] [2021-01-06 16:45:19,980 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [98609754] [2021-01-06 16:45:19,980 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 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:45:23,195 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2021-01-06 16:45:23,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:45:23,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 75 conjunts are in the unsatisfiable core [2021-01-06 16:45:23,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:45:23,833 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:45:23,833 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:45:23,834 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2021-01-06 16:45:23,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323526140] [2021-01-06 16:45:23,834 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-01-06 16:45:23,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:45:23,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-01-06 16:45:23,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=1026, Unknown=0, NotChecked=0, Total=1122 [2021-01-06 16:45:23,835 INFO L87 Difference]: Start difference. First operand 126 states and 128 transitions. Second operand 34 states. [2021-01-06 16:45:25,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:45:25,427 INFO L93 Difference]: Finished difference Result 133 states and 135 transitions. [2021-01-06 16:45:25,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-01-06 16:45:25,428 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 66 [2021-01-06 16:45:25,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:45:25,429 INFO L225 Difference]: With dead ends: 133 [2021-01-06 16:45:25,430 INFO L226 Difference]: Without dead ends: 129 [2021-01-06 16:45:25,430 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 54 SyntacticMatches, 13 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=96, Invalid=1026, Unknown=0, NotChecked=0, Total=1122 [2021-01-06 16:45:25,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-01-06 16:45:25,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 128. [2021-01-06 16:45:25,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2021-01-06 16:45:25,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 130 transitions. [2021-01-06 16:45:25,436 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 130 transitions. Word has length 66 [2021-01-06 16:45:25,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:45:25,436 INFO L481 AbstractCegarLoop]: Abstraction has 128 states and 130 transitions. [2021-01-06 16:45:25,436 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2021-01-06 16:45:25,436 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 130 transitions. [2021-01-06 16:45:25,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-01-06 16:45:25,437 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:45:25,437 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 1, 1, 1, 1, 1, 1] [2021-01-06 16:45:25,637 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2021-01-06 16:45:25,638 INFO L429 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:45:25,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:45:25,639 INFO L82 PathProgramCache]: Analyzing trace with hash -111863989, now seen corresponding path program 29 times [2021-01-06 16:45:25,639 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:45:25,639 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224341049] [2021-01-06 16:45:25,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:45:25,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:45:26,640 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:45:26,640 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224341049] [2021-01-06 16:45:26,640 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1311601906] [2021-01-06 16:45:26,641 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 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:45:33,360 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) [2021-01-06 16:45:33,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:45:33,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 92 conjunts are in the unsatisfiable core [2021-01-06 16:45:33,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:45:34,320 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:45:34,321 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:45:34,321 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2021-01-06 16:45:34,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679844349] [2021-01-06 16:45:34,321 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-01-06 16:45:34,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:45:34,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-01-06 16:45:34,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=1026, Unknown=0, NotChecked=0, Total=1122 [2021-01-06 16:45:34,322 INFO L87 Difference]: Start difference. First operand 128 states and 130 transitions. Second operand 34 states. [2021-01-06 16:45:36,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:45:36,155 INFO L93 Difference]: Finished difference Result 135 states and 137 transitions. [2021-01-06 16:45:36,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-01-06 16:45:36,156 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 66 [2021-01-06 16:45:36,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:45:36,157 INFO L225 Difference]: With dead ends: 135 [2021-01-06 16:45:36,157 INFO L226 Difference]: Without dead ends: 131 [2021-01-06 16:45:36,157 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 37 SyntacticMatches, 30 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=96, Invalid=1026, Unknown=0, NotChecked=0, Total=1122 [2021-01-06 16:45:36,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-01-06 16:45:36,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 130. [2021-01-06 16:45:36,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2021-01-06 16:45:36,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 132 transitions. [2021-01-06 16:45:36,164 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 132 transitions. Word has length 66 [2021-01-06 16:45:36,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:45:36,165 INFO L481 AbstractCegarLoop]: Abstraction has 130 states and 132 transitions. [2021-01-06 16:45:36,165 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2021-01-06 16:45:36,165 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 132 transitions. [2021-01-06 16:45:36,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-01-06 16:45:36,165 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:45:36,166 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 1, 1, 1, 1, 1, 1] [2021-01-06 16:45:36,370 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:45:36,370 INFO L429 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:45:36,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:45:36,371 INFO L82 PathProgramCache]: Analyzing trace with hash 136711340, now seen corresponding path program 31 times [2021-01-06 16:45:36,371 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:45:36,372 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077166752] [2021-01-06 16:45:36,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:45:36,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:45:37,249 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:45:37,249 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077166752] [2021-01-06 16:45:37,250 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [916432406] [2021-01-06 16:45:37,250 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 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:45:37,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:45:37,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 65 conjunts are in the unsatisfiable core [2021-01-06 16:45:37,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:45:37,467 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:45:37,467 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:45:37,467 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2021-01-06 16:45:37,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217743538] [2021-01-06 16:45:37,468 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-01-06 16:45:37,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:45:37,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-01-06 16:45:37,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=1091, Unknown=0, NotChecked=0, Total=1190 [2021-01-06 16:45:37,469 INFO L87 Difference]: Start difference. First operand 130 states and 132 transitions. Second operand 35 states. [2021-01-06 16:45:39,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:45:39,139 INFO L93 Difference]: Finished difference Result 137 states and 139 transitions. [2021-01-06 16:45:39,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-01-06 16:45:39,140 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 68 [2021-01-06 16:45:39,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:45:39,141 INFO L225 Difference]: With dead ends: 137 [2021-01-06 16:45:39,141 INFO L226 Difference]: Without dead ends: 133 [2021-01-06 16:45:39,142 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=99, Invalid=1091, Unknown=0, NotChecked=0, Total=1190 [2021-01-06 16:45:39,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-01-06 16:45:39,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 132. [2021-01-06 16:45:39,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2021-01-06 16:45:39,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 134 transitions. [2021-01-06 16:45:39,148 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 134 transitions. Word has length 68 [2021-01-06 16:45:39,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:45:39,148 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 134 transitions. [2021-01-06 16:45:39,148 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2021-01-06 16:45:39,148 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 134 transitions. [2021-01-06 16:45:39,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-01-06 16:45:39,149 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:45:39,149 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 1, 1, 1, 1, 1, 1] [2021-01-06 16:45:39,359 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2021-01-06 16:45:39,360 INFO L429 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:45:39,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:45:39,361 INFO L82 PathProgramCache]: Analyzing trace with hash -76768274, now seen corresponding path program 30 times [2021-01-06 16:45:39,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:45:39,361 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105500500] [2021-01-06 16:45:39,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:45:39,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:45:40,339 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:45:40,339 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105500500] [2021-01-06 16:45:40,339 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [809123686] [2021-01-06 16:45:40,340 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 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:45:45,864 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 32 check-sat command(s) [2021-01-06 16:45:45,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:45:45,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 88 conjunts are in the unsatisfiable core [2021-01-06 16:45:45,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:45:46,889 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:45:46,890 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:45:46,890 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2021-01-06 16:45:46,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092109382] [2021-01-06 16:45:46,890 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-01-06 16:45:46,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:45:46,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-01-06 16:45:46,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=1091, Unknown=0, NotChecked=0, Total=1190 [2021-01-06 16:45:46,891 INFO L87 Difference]: Start difference. First operand 132 states and 134 transitions. Second operand 35 states. [2021-01-06 16:45:48,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:45:48,870 INFO L93 Difference]: Finished difference Result 139 states and 141 transitions. [2021-01-06 16:45:48,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-01-06 16:45:48,870 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 68 [2021-01-06 16:45:48,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:45:48,871 INFO L225 Difference]: With dead ends: 139 [2021-01-06 16:45:48,872 INFO L226 Difference]: Without dead ends: 135 [2021-01-06 16:45:48,872 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 45 SyntacticMatches, 24 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=99, Invalid=1091, Unknown=0, NotChecked=0, Total=1190 [2021-01-06 16:45:48,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-01-06 16:45:48,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 134. [2021-01-06 16:45:48,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2021-01-06 16:45:48,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 136 transitions. [2021-01-06 16:45:48,878 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 136 transitions. Word has length 68 [2021-01-06 16:45:48,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:45:48,878 INFO L481 AbstractCegarLoop]: Abstraction has 134 states and 136 transitions. [2021-01-06 16:45:48,878 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2021-01-06 16:45:48,878 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 136 transitions. [2021-01-06 16:45:48,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-01-06 16:45:48,879 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:45:48,879 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 1, 1, 1, 1, 1, 1] [2021-01-06 16:45:49,079 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:45:49,080 INFO L429 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:45:49,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:45:49,080 INFO L82 PathProgramCache]: Analyzing trace with hash -1712198639, now seen corresponding path program 32 times [2021-01-06 16:45:49,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:45:49,081 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985478708] [2021-01-06 16:45:49,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:45:49,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:45:50,209 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:45:50,210 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985478708] [2021-01-06 16:45:50,210 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [958499750] [2021-01-06 16:45:50,210 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 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:45:50,268 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:45:50,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:45:50,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 67 conjunts are in the unsatisfiable core [2021-01-06 16:45:50,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:45:50,446 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:45:50,446 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:45:50,446 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2021-01-06 16:45:50,447 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294628157] [2021-01-06 16:45:50,447 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-01-06 16:45:50,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:45:50,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-01-06 16:45:50,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=1158, Unknown=0, NotChecked=0, Total=1260 [2021-01-06 16:45:50,448 INFO L87 Difference]: Start difference. First operand 134 states and 136 transitions. Second operand 36 states. [2021-01-06 16:45:52,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:45:52,248 INFO L93 Difference]: Finished difference Result 141 states and 143 transitions. [2021-01-06 16:45:52,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-01-06 16:45:52,249 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 70 [2021-01-06 16:45:52,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:45:52,250 INFO L225 Difference]: With dead ends: 141 [2021-01-06 16:45:52,250 INFO L226 Difference]: Without dead ends: 137 [2021-01-06 16:45:52,250 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=102, Invalid=1158, Unknown=0, NotChecked=0, Total=1260 [2021-01-06 16:45:52,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-01-06 16:45:52,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 136. [2021-01-06 16:45:52,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2021-01-06 16:45:52,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 138 transitions. [2021-01-06 16:45:52,255 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 138 transitions. Word has length 70 [2021-01-06 16:45:52,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:45:52,255 INFO L481 AbstractCegarLoop]: Abstraction has 136 states and 138 transitions. [2021-01-06 16:45:52,255 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2021-01-06 16:45:52,255 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 138 transitions. [2021-01-06 16:45:52,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-01-06 16:45:52,255 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:45:52,256 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 1, 1, 1, 1, 1, 1] [2021-01-06 16:45:52,456 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-01-06 16:45:52,457 INFO L429 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:45:52,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:45:52,457 INFO L82 PathProgramCache]: Analyzing trace with hash -709524527, now seen corresponding path program 31 times [2021-01-06 16:45:52,458 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:45:52,458 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563879055] [2021-01-06 16:45:52,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:45:52,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:45:53,553 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:45:53,554 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563879055] [2021-01-06 16:45:53,554 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1697981738] [2021-01-06 16:45:53,554 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 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:45:53,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:45:53,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 67 conjunts are in the unsatisfiable core [2021-01-06 16:45:53,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:45:53,788 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:45:53,789 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:45:53,789 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2021-01-06 16:45:53,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660741493] [2021-01-06 16:45:53,789 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-01-06 16:45:53,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:45:53,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-01-06 16:45:53,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=1158, Unknown=0, NotChecked=0, Total=1260 [2021-01-06 16:45:53,790 INFO L87 Difference]: Start difference. First operand 136 states and 138 transitions. Second operand 36 states. [2021-01-06 16:45:55,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:45:55,985 INFO L93 Difference]: Finished difference Result 143 states and 145 transitions. [2021-01-06 16:45:55,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-01-06 16:45:55,986 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 70 [2021-01-06 16:45:55,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:45:55,987 INFO L225 Difference]: With dead ends: 143 [2021-01-06 16:45:55,987 INFO L226 Difference]: Without dead ends: 139 [2021-01-06 16:45:55,988 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=102, Invalid=1158, Unknown=0, NotChecked=0, Total=1260 [2021-01-06 16:45:55,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-01-06 16:45:55,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 138. [2021-01-06 16:45:55,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2021-01-06 16:45:55,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 140 transitions. [2021-01-06 16:45:55,994 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 140 transitions. Word has length 70 [2021-01-06 16:45:55,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:45:55,995 INFO L481 AbstractCegarLoop]: Abstraction has 138 states and 140 transitions. [2021-01-06 16:45:55,995 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2021-01-06 16:45:55,995 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 140 transitions. [2021-01-06 16:45:55,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-01-06 16:45:55,995 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:45:55,995 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 1, 1, 1, 1, 1, 1] [2021-01-06 16:45:56,197 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:45:56,198 INFO L429 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:45:56,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:45:56,198 INFO L82 PathProgramCache]: Analyzing trace with hash -398227914, now seen corresponding path program 33 times [2021-01-06 16:45:56,199 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:45:56,199 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086380221] [2021-01-06 16:45:56,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:45:56,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:45:57,378 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:45:57,378 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086380221] [2021-01-06 16:45:57,378 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1759235999] [2021-01-06 16:45:57,378 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 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:45:58,203 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 34 check-sat command(s) [2021-01-06 16:45:58,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:45:58,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 77 conjunts are in the unsatisfiable core [2021-01-06 16:45:58,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:45:58,789 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:45:58,790 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:45:58,790 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2021-01-06 16:45:58,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57696383] [2021-01-06 16:45:58,790 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-01-06 16:45:58,791 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:45:58,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-01-06 16:45:58,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1227, Unknown=0, NotChecked=0, Total=1332 [2021-01-06 16:45:58,791 INFO L87 Difference]: Start difference. First operand 138 states and 140 transitions. Second operand 37 states. [2021-01-06 16:46:00,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:46:00,567 INFO L93 Difference]: Finished difference Result 145 states and 147 transitions. [2021-01-06 16:46:00,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-01-06 16:46:00,567 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 72 [2021-01-06 16:46:00,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:46:00,568 INFO L225 Difference]: With dead ends: 145 [2021-01-06 16:46:00,568 INFO L226 Difference]: Without dead ends: 141 [2021-01-06 16:46:00,569 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 64 SyntacticMatches, 9 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=105, Invalid=1227, Unknown=0, NotChecked=0, Total=1332 [2021-01-06 16:46:00,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-01-06 16:46:00,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 140. [2021-01-06 16:46:00,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2021-01-06 16:46:00,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 142 transitions. [2021-01-06 16:46:00,573 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 142 transitions. Word has length 72 [2021-01-06 16:46:00,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:46:00,573 INFO L481 AbstractCegarLoop]: Abstraction has 140 states and 142 transitions. [2021-01-06 16:46:00,573 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2021-01-06 16:46:00,573 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 142 transitions. [2021-01-06 16:46:00,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-01-06 16:46:00,574 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:46:00,574 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 1, 1, 1, 1, 1, 1] [2021-01-06 16:46:00,774 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-01-06 16:46:00,775 INFO L429 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:46:00,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:46:00,775 INFO L82 PathProgramCache]: Analyzing trace with hash 1097072372, now seen corresponding path program 32 times [2021-01-06 16:46:00,776 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:46:00,776 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285764457] [2021-01-06 16:46:00,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:46:00,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:46:01,952 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:46:01,952 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285764457] [2021-01-06 16:46:01,952 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227241588] [2021-01-06 16:46:01,953 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 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:46:02,020 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:46:02,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:46:02,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 69 conjunts are in the unsatisfiable core [2021-01-06 16:46:02,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:46:02,199 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:46:02,199 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:46:02,199 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2021-01-06 16:46:02,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167735854] [2021-01-06 16:46:02,200 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-01-06 16:46:02,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:46:02,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-01-06 16:46:02,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1227, Unknown=0, NotChecked=0, Total=1332 [2021-01-06 16:46:02,200 INFO L87 Difference]: Start difference. First operand 140 states and 142 transitions. Second operand 37 states. [2021-01-06 16:46:04,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:46:04,469 INFO L93 Difference]: Finished difference Result 147 states and 149 transitions. [2021-01-06 16:46:04,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-01-06 16:46:04,470 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 72 [2021-01-06 16:46:04,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:46:04,471 INFO L225 Difference]: With dead ends: 147 [2021-01-06 16:46:04,471 INFO L226 Difference]: Without dead ends: 143 [2021-01-06 16:46:04,472 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 72 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=105, Invalid=1227, Unknown=0, NotChecked=0, Total=1332 [2021-01-06 16:46:04,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-01-06 16:46:04,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 142. [2021-01-06 16:46:04,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2021-01-06 16:46:04,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 144 transitions. [2021-01-06 16:46:04,476 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 144 transitions. Word has length 72 [2021-01-06 16:46:04,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:46:04,476 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 144 transitions. [2021-01-06 16:46:04,476 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2021-01-06 16:46:04,476 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 144 transitions. [2021-01-06 16:46:04,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-01-06 16:46:04,477 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:46:04,477 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 1, 1, 1, 1, 1, 1] [2021-01-06 16:46:04,677 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-01-06 16:46:04,678 INFO L429 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:46:04,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:46:04,679 INFO L82 PathProgramCache]: Analyzing trace with hash -392746213, now seen corresponding path program 34 times [2021-01-06 16:46:04,679 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:46:04,679 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78087528] [2021-01-06 16:46:04,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:46:04,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:46:05,822 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:46:05,822 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78087528] [2021-01-06 16:46:05,822 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [821051267] [2021-01-06 16:46:05,822 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 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:46:05,877 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 16:46:05,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:46:05,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 71 conjunts are in the unsatisfiable core [2021-01-06 16:46:05,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:46:06,033 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:46:06,033 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:46:06,033 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2021-01-06 16:46:06,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168043743] [2021-01-06 16:46:06,034 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-01-06 16:46:06,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:46:06,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-01-06 16:46:06,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1298, Unknown=0, NotChecked=0, Total=1406 [2021-01-06 16:46:06,035 INFO L87 Difference]: Start difference. First operand 142 states and 144 transitions. Second operand 38 states. [2021-01-06 16:46:07,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:46:07,941 INFO L93 Difference]: Finished difference Result 149 states and 151 transitions. [2021-01-06 16:46:07,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-01-06 16:46:07,942 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 74 [2021-01-06 16:46:07,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:46:07,946 INFO L225 Difference]: With dead ends: 149 [2021-01-06 16:46:07,946 INFO L226 Difference]: Without dead ends: 145 [2021-01-06 16:46:07,949 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 74 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=108, Invalid=1298, Unknown=0, NotChecked=0, Total=1406 [2021-01-06 16:46:07,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-01-06 16:46:07,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 144. [2021-01-06 16:46:07,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2021-01-06 16:46:07,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 146 transitions. [2021-01-06 16:46:07,956 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 146 transitions. Word has length 74 [2021-01-06 16:46:07,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:46:07,956 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 146 transitions. [2021-01-06 16:46:07,956 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2021-01-06 16:46:07,956 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 146 transitions. [2021-01-06 16:46:07,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-01-06 16:46:07,957 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:46:07,957 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 1, 1, 1, 1, 1, 1] [2021-01-06 16:46:08,161 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-01-06 16:46:08,162 INFO L429 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:46:08,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:46:08,162 INFO L82 PathProgramCache]: Analyzing trace with hash 2069904727, now seen corresponding path program 33 times [2021-01-06 16:46:08,163 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:46:08,163 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440192007] [2021-01-06 16:46:08,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:46:08,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:46:09,288 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:46:09,288 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440192007] [2021-01-06 16:46:09,288 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [486479683] [2021-01-06 16:46:09,288 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 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:46:11,300 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 35 check-sat command(s) [2021-01-06 16:46:11,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:46:11,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 82 conjunts are in the unsatisfiable core [2021-01-06 16:46:11,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:46:12,074 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:46:12,075 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:46:12,075 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2021-01-06 16:46:12,075 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968432660] [2021-01-06 16:46:12,076 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-01-06 16:46:12,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:46:12,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-01-06 16:46:12,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1298, Unknown=0, NotChecked=0, Total=1406 [2021-01-06 16:46:12,077 INFO L87 Difference]: Start difference. First operand 144 states and 146 transitions. Second operand 38 states. [2021-01-06 16:46:14,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:46:14,366 INFO L93 Difference]: Finished difference Result 151 states and 153 transitions. [2021-01-06 16:46:14,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-01-06 16:46:14,367 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 74 [2021-01-06 16:46:14,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:46:14,370 INFO L225 Difference]: With dead ends: 151 [2021-01-06 16:46:14,370 INFO L226 Difference]: Without dead ends: 147 [2021-01-06 16:46:14,370 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 63 SyntacticMatches, 12 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=108, Invalid=1298, Unknown=0, NotChecked=0, Total=1406 [2021-01-06 16:46:14,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-01-06 16:46:14,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 146. [2021-01-06 16:46:14,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2021-01-06 16:46:14,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 148 transitions. [2021-01-06 16:46:14,377 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 148 transitions. Word has length 74 [2021-01-06 16:46:14,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:46:14,377 INFO L481 AbstractCegarLoop]: Abstraction has 146 states and 148 transitions. [2021-01-06 16:46:14,377 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2021-01-06 16:46:14,377 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 148 transitions. [2021-01-06 16:46:14,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-01-06 16:46:14,378 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:46:14,378 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 1, 1, 1, 1, 1, 1] [2021-01-06 16:46:14,582 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:46:14,583 INFO L429 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:46:14,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:46:14,584 INFO L82 PathProgramCache]: Analyzing trace with hash 580201152, now seen corresponding path program 35 times [2021-01-06 16:46:14,584 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:46:14,584 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172866180] [2021-01-06 16:46:14,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:46:14,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:46:15,820 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:46:15,821 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172866180] [2021-01-06 16:46:15,821 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1489126381] [2021-01-06 16:46:15,821 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 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:46:47,561 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 36 check-sat command(s) [2021-01-06 16:46:47,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:46:47,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 76 conjunts are in the unsatisfiable core [2021-01-06 16:46:47,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:46:47,827 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:46:47,828 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:46:47,828 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 39 [2021-01-06 16:46:47,828 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912317203] [2021-01-06 16:46:47,828 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-01-06 16:46:47,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:46:47,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-01-06 16:46:47,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1371, Unknown=0, NotChecked=0, Total=1482 [2021-01-06 16:46:47,829 INFO L87 Difference]: Start difference. First operand 146 states and 148 transitions. Second operand 39 states. [2021-01-06 16:46:49,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:46:49,881 INFO L93 Difference]: Finished difference Result 153 states and 155 transitions. [2021-01-06 16:46:49,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-01-06 16:46:49,882 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 76 [2021-01-06 16:46:49,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:46:49,883 INFO L225 Difference]: With dead ends: 153 [2021-01-06 16:46:49,883 INFO L226 Difference]: Without dead ends: 149 [2021-01-06 16:46:49,883 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 73 SyntacticMatches, 4 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=111, Invalid=1371, Unknown=0, NotChecked=0, Total=1482 [2021-01-06 16:46:49,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-01-06 16:46:49,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 148. [2021-01-06 16:46:49,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2021-01-06 16:46:49,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 150 transitions. [2021-01-06 16:46:49,893 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 150 transitions. Word has length 76 [2021-01-06 16:46:49,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:46:49,893 INFO L481 AbstractCegarLoop]: Abstraction has 148 states and 150 transitions. [2021-01-06 16:46:49,894 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2021-01-06 16:46:49,894 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 150 transitions. [2021-01-06 16:46:49,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-01-06 16:46:49,894 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:46:49,894 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 1, 1, 1, 1, 1, 1] [2021-01-06 16:46:50,100 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:46:50,100 INFO L429 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:46:50,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:46:50,101 INFO L82 PathProgramCache]: Analyzing trace with hash 658927354, now seen corresponding path program 34 times [2021-01-06 16:46:50,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:46:50,101 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8059588] [2021-01-06 16:46:50,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:46:50,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:46:51,231 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:46:51,231 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8059588] [2021-01-06 16:46:51,231 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1552673640] [2021-01-06 16:46:51,231 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 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:46:51,293 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 16:46:51,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:46:51,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 73 conjunts are in the unsatisfiable core [2021-01-06 16:46:51,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:46:51,457 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:46:51,457 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:46:51,458 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 39 [2021-01-06 16:46:51,458 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408703488] [2021-01-06 16:46:51,458 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-01-06 16:46:51,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:46:51,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-01-06 16:46:51,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1371, Unknown=0, NotChecked=0, Total=1482 [2021-01-06 16:46:51,459 INFO L87 Difference]: Start difference. First operand 148 states and 150 transitions. Second operand 39 states. [2021-01-06 16:46:53,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:46:53,817 INFO L93 Difference]: Finished difference Result 155 states and 157 transitions. [2021-01-06 16:46:53,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-01-06 16:46:53,818 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 76 [2021-01-06 16:46:53,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:46:53,820 INFO L225 Difference]: With dead ends: 155 [2021-01-06 16:46:53,820 INFO L226 Difference]: Without dead ends: 151 [2021-01-06 16:46:53,820 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 76 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=111, Invalid=1371, Unknown=0, NotChecked=0, Total=1482 [2021-01-06 16:46:53,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-01-06 16:46:53,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 150. [2021-01-06 16:46:53,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2021-01-06 16:46:53,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 152 transitions. [2021-01-06 16:46:53,828 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 152 transitions. Word has length 76 [2021-01-06 16:46:53,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:46:53,828 INFO L481 AbstractCegarLoop]: Abstraction has 150 states and 152 transitions. [2021-01-06 16:46:53,828 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2021-01-06 16:46:53,828 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 152 transitions. [2021-01-06 16:46:53,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-01-06 16:46:53,829 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:46:53,829 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 1, 1, 1, 1, 1, 1] [2021-01-06 16:46:54,042 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:46:54,043 INFO L429 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:46:54,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:46:54,043 INFO L82 PathProgramCache]: Analyzing trace with hash -720251611, now seen corresponding path program 36 times [2021-01-06 16:46:54,044 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:46:54,044 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042502715] [2021-01-06 16:46:54,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:46:54,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:46:55,319 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:46:55,319 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042502715] [2021-01-06 16:46:55,320 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1156395462] [2021-01-06 16:46:55,320 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 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:46:58,099 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2021-01-06 16:46:58,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:46:58,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 76 conjunts are in the unsatisfiable core [2021-01-06 16:46:58,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:46:58,345 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:46:58,345 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:46:58,345 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 40 [2021-01-06 16:46:58,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634202926] [2021-01-06 16:46:58,346 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-01-06 16:46:58,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:46:58,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-01-06 16:46:58,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=1446, Unknown=0, NotChecked=0, Total=1560 [2021-01-06 16:46:58,346 INFO L87 Difference]: Start difference. First operand 150 states and 152 transitions. Second operand 40 states. [2021-01-06 16:47:00,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:47:00,440 INFO L93 Difference]: Finished difference Result 157 states and 159 transitions. [2021-01-06 16:47:00,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-01-06 16:47:00,441 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 78 [2021-01-06 16:47:00,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:47:00,450 INFO L225 Difference]: With dead ends: 157 [2021-01-06 16:47:00,450 INFO L226 Difference]: Without dead ends: 153 [2021-01-06 16:47:00,450 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 77 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=114, Invalid=1446, Unknown=0, NotChecked=0, Total=1560 [2021-01-06 16:47:00,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-01-06 16:47:00,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 152. [2021-01-06 16:47:00,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2021-01-06 16:47:00,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 154 transitions. [2021-01-06 16:47:00,457 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 154 transitions. Word has length 78 [2021-01-06 16:47:00,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:47:00,457 INFO L481 AbstractCegarLoop]: Abstraction has 152 states and 154 transitions. [2021-01-06 16:47:00,457 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2021-01-06 16:47:00,457 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 154 transitions. [2021-01-06 16:47:00,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-01-06 16:47:00,458 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:47:00,458 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 1, 1, 1, 1, 1, 1] [2021-01-06 16:47:00,662 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable73 [2021-01-06 16:47:00,663 INFO L429 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:47:00,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:47:00,663 INFO L82 PathProgramCache]: Analyzing trace with hash 1919337437, now seen corresponding path program 35 times [2021-01-06 16:47:00,664 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:47:00,664 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023993232] [2021-01-06 16:47:00,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:47:00,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:47:01,974 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:47:01,974 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023993232] [2021-01-06 16:47:01,975 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1426469505] [2021-01-06 16:47:01,975 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 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:47:22,687 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 37 check-sat command(s) [2021-01-06 16:47:22,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:47:22,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 106 conjunts are in the unsatisfiable core [2021-01-06 16:47:22,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:47:24,055 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:47:24,055 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:47:24,055 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 40 [2021-01-06 16:47:24,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488640822] [2021-01-06 16:47:24,055 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-01-06 16:47:24,056 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:47:24,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-01-06 16:47:24,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=1446, Unknown=0, NotChecked=0, Total=1560 [2021-01-06 16:47:24,056 INFO L87 Difference]: Start difference. First operand 152 states and 154 transitions. Second operand 40 states. [2021-01-06 16:47:26,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:47:26,807 INFO L93 Difference]: Finished difference Result 159 states and 161 transitions. [2021-01-06 16:47:26,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-01-06 16:47:26,808 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 78 [2021-01-06 16:47:26,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:47:26,809 INFO L225 Difference]: With dead ends: 159 [2021-01-06 16:47:26,809 INFO L226 Difference]: Without dead ends: 155 [2021-01-06 16:47:26,809 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 47 SyntacticMatches, 32 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=114, Invalid=1446, Unknown=0, NotChecked=0, Total=1560 [2021-01-06 16:47:26,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-01-06 16:47:26,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 154. [2021-01-06 16:47:26,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2021-01-06 16:47:26,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 156 transitions. [2021-01-06 16:47:26,817 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 156 transitions. Word has length 78 [2021-01-06 16:47:26,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:47:26,817 INFO L481 AbstractCegarLoop]: Abstraction has 154 states and 156 transitions. [2021-01-06 16:47:26,817 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2021-01-06 16:47:26,817 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 156 transitions. [2021-01-06 16:47:26,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-01-06 16:47:26,818 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:47:26,818 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 1, 1, 1, 1, 1, 1] [2021-01-06 16:47:27,025 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:47:27,025 INFO L429 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:47:27,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:47:27,026 INFO L82 PathProgramCache]: Analyzing trace with hash -619873718, now seen corresponding path program 37 times [2021-01-06 16:47:27,027 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:47:27,027 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027494663] [2021-01-06 16:47:27,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:47:27,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:47:28,408 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:47:28,408 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027494663] [2021-01-06 16:47:28,408 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1613270431] [2021-01-06 16:47:28,409 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 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:47:28,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:47:28,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 77 conjunts are in the unsatisfiable core [2021-01-06 16:47:28,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:47:28,670 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:47:28,670 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:47:28,670 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 41 [2021-01-06 16:47:28,670 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605770157] [2021-01-06 16:47:28,671 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-01-06 16:47:28,671 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:47:28,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-01-06 16:47:28,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1523, Unknown=0, NotChecked=0, Total=1640 [2021-01-06 16:47:28,672 INFO L87 Difference]: Start difference. First operand 154 states and 156 transitions. Second operand 41 states. [2021-01-06 16:47:30,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:47:30,895 INFO L93 Difference]: Finished difference Result 161 states and 163 transitions. [2021-01-06 16:47:30,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-01-06 16:47:30,896 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 80 [2021-01-06 16:47:30,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:47:30,897 INFO L225 Difference]: With dead ends: 161 [2021-01-06 16:47:30,897 INFO L226 Difference]: Without dead ends: 157 [2021-01-06 16:47:30,898 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=117, Invalid=1523, Unknown=0, NotChecked=0, Total=1640 [2021-01-06 16:47:30,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-01-06 16:47:30,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 156. [2021-01-06 16:47:30,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2021-01-06 16:47:30,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 158 transitions. [2021-01-06 16:47:30,903 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 158 transitions. Word has length 80 [2021-01-06 16:47:30,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:47:30,904 INFO L481 AbstractCegarLoop]: Abstraction has 156 states and 158 transitions. [2021-01-06 16:47:30,904 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2021-01-06 16:47:30,904 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 158 transitions. [2021-01-06 16:47:30,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-01-06 16:47:30,904 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:47:30,904 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 1, 1, 1, 1, 1, 1] [2021-01-06 16:47:31,105 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:47:31,105 INFO L429 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:47:31,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:47:31,106 INFO L82 PathProgramCache]: Analyzing trace with hash 1992649728, now seen corresponding path program 36 times [2021-01-06 16:47:31,106 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:47:31,106 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357067276] [2021-01-06 16:47:31,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:47:31,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:47:32,382 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:47:32,382 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357067276] [2021-01-06 16:47:32,382 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306912099] [2021-01-06 16:47:32,383 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 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:47:35,862 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 38 check-sat command(s) [2021-01-06 16:47:35,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:47:35,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 88 conjunts are in the unsatisfiable core [2021-01-06 16:47:35,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:47:36,598 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:47:36,598 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:47:36,598 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 41 [2021-01-06 16:47:36,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993200854] [2021-01-06 16:47:36,598 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-01-06 16:47:36,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:47:36,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-01-06 16:47:36,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1523, Unknown=0, NotChecked=0, Total=1640 [2021-01-06 16:47:36,599 INFO L87 Difference]: Start difference. First operand 156 states and 158 transitions. Second operand 41 states. [2021-01-06 16:47:39,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:47:39,501 INFO L93 Difference]: Finished difference Result 163 states and 165 transitions. [2021-01-06 16:47:39,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-01-06 16:47:39,502 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 80 [2021-01-06 16:47:39,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:47:39,503 INFO L225 Difference]: With dead ends: 163 [2021-01-06 16:47:39,503 INFO L226 Difference]: Without dead ends: 159 [2021-01-06 16:47:39,504 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 69 SyntacticMatches, 12 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=117, Invalid=1523, Unknown=0, NotChecked=0, Total=1640 [2021-01-06 16:47:39,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2021-01-06 16:47:39,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 158. [2021-01-06 16:47:39,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2021-01-06 16:47:39,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 160 transitions. [2021-01-06 16:47:39,510 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 160 transitions. Word has length 80 [2021-01-06 16:47:39,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:47:39,511 INFO L481 AbstractCegarLoop]: Abstraction has 158 states and 160 transitions. [2021-01-06 16:47:39,511 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2021-01-06 16:47:39,511 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 160 transitions. [2021-01-06 16:47:39,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-01-06 16:47:39,511 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:47:39,512 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 1, 1, 1, 1, 1, 1] [2021-01-06 16:47:39,716 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:47:39,716 INFO L429 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:47:39,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:47:39,717 INFO L82 PathProgramCache]: Analyzing trace with hash 1354000943, now seen corresponding path program 38 times [2021-01-06 16:47:39,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:47:39,717 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666915113] [2021-01-06 16:47:39,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:47:39,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:47:41,216 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:47:41,216 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666915113] [2021-01-06 16:47:41,216 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1689008360] [2021-01-06 16:47:41,216 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 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:47:41,275 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:47:41,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:47:41,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 79 conjunts are in the unsatisfiable core [2021-01-06 16:47:41,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:47:41,471 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:47:41,471 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:47:41,471 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 42 [2021-01-06 16:47:41,472 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484867892] [2021-01-06 16:47:41,472 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-01-06 16:47:41,472 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:47:41,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-01-06 16:47:41,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1602, Unknown=0, NotChecked=0, Total=1722 [2021-01-06 16:47:41,472 INFO L87 Difference]: Start difference. First operand 158 states and 160 transitions. Second operand 42 states.