/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/loop-acceleration/simple_1-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-06 16:46:07,526 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 16:46:07,531 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 16:46:07,594 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-06 16:46:07,594 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-06 16:46:07,597 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-06 16:46:07,602 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-06 16:46:07,608 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-06 16:46:07,612 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-06 16:46:07,619 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-06 16:46:07,623 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-06 16:46:07,625 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-06 16:46:07,626 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-06 16:46:07,630 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-06 16:46:07,633 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-06 16:46:07,635 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-06 16:46:07,637 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-06 16:46:07,640 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-06 16:46:07,648 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-06 16:46:07,657 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-06 16:46:07,659 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-06 16:46:07,662 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-06 16:46:07,663 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-06 16:46:07,674 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-06 16:46:07,683 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-01-06 16:46:07,689 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-01-06 16:46:07,690 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-01-06 16:46:07,692 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-01-06 16:46:07,693 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-01-06 16:46:07,694 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-01-06 16:46:07,694 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-01-06 16:46:07,695 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-01-06 16:46:07,702 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-01-06 16:46:07,702 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 16:46:07,703 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 16:46:07,704 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 16:46:07,705 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-01-06 16:46:07,755 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 16:46:07,755 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 16:46:07,760 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 16:46:07,760 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 16:46:07,760 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 16:46:07,761 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 16:46:07,761 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 16:46:07,761 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 16:46:07,761 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 16:46:07,762 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 16:46:07,763 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 16:46:07,763 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 16:46:07,763 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 16:46:07,764 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 16:46:07,764 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 16:46:07,764 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 16:46:07,764 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 16:46:07,765 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 16:46:07,765 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 16:46:07,765 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 16:46:07,765 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 16:46:07,765 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 16:46:07,766 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 16:46:07,766 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 16:46:07,766 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 16:46:07,766 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 16:46:08,225 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 16:46:08,257 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 16:46:08,261 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 16:46:08,262 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 16:46:08,263 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 16:46:08,264 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-acceleration/simple_1-1.c [2021-01-06 16:46:08,362 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/c17b610c9/179f4366ae8945b9be8d47520eba60e3/FLAG222786b50 [2021-01-06 16:46:09,129 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 16:46:09,130 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/loop-acceleration/simple_1-1.c [2021-01-06 16:46:09,140 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/c17b610c9/179f4366ae8945b9be8d47520eba60e3/FLAG222786b50 [2021-01-06 16:46:09,476 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/c17b610c9/179f4366ae8945b9be8d47520eba60e3 [2021-01-06 16:46:09,480 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 16:46:09,482 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 16:46:09,484 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 16:46:09,484 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 16:46:09,491 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 16:46:09,492 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 04:46:09" (1/1) ... [2021-01-06 16:46:09,494 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@352a54e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:46:09, skipping insertion in model container [2021-01-06 16:46:09,495 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 04:46:09" (1/1) ... [2021-01-06 16:46:09,504 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 16:46:09,521 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-01-06 16:46:09,675 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/loop-acceleration/simple_1-1.c[322,335] [2021-01-06 16:46:09,686 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 16:46:09,697 INFO L203 MainTranslator]: Completed pre-run [2021-01-06 16:46:09,711 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/loop-acceleration/simple_1-1.c[322,335] [2021-01-06 16:46:09,714 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 16:46:09,731 INFO L208 MainTranslator]: Completed translation [2021-01-06 16:46:09,731 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:46:09 WrapperNode [2021-01-06 16:46:09,732 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 16:46:09,733 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 16:46:09,733 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 16:46:09,733 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 16:46:09,743 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:46:09" (1/1) ... [2021-01-06 16:46:09,752 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:46:09" (1/1) ... [2021-01-06 16:46:09,773 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 16:46:09,774 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 16:46:09,774 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 16:46:09,774 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 16:46:09,784 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:46:09" (1/1) ... [2021-01-06 16:46:09,784 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:46:09" (1/1) ... [2021-01-06 16:46:09,786 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:46:09" (1/1) ... [2021-01-06 16:46:09,786 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:46:09" (1/1) ... [2021-01-06 16:46:09,789 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:46:09" (1/1) ... [2021-01-06 16:46:09,794 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:46:09" (1/1) ... [2021-01-06 16:46:09,795 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:46:09" (1/1) ... [2021-01-06 16:46:09,797 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 16:46:09,798 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 16:46:09,798 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 16:46:09,798 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 16:46:09,799 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:46:09" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 16:46:09,897 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 16:46:09,898 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 16:46:09,898 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 16:46:09,899 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 16:46:10,166 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 16:46:10,167 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-01-06 16:46:10,169 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 04:46:10 BoogieIcfgContainer [2021-01-06 16:46:10,170 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 16:46:10,172 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 16:46:10,173 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 16:46:10,178 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 16:46:10,182 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 04:46:09" (1/3) ... [2021-01-06 16:46:10,184 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1683eb1f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 04:46:10, skipping insertion in model container [2021-01-06 16:46:10,184 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:46:09" (2/3) ... [2021-01-06 16:46:10,185 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1683eb1f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 04:46:10, skipping insertion in model container [2021-01-06 16:46:10,186 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 04:46:10" (3/3) ... [2021-01-06 16:46:10,188 INFO L111 eAbstractionObserver]: Analyzing ICFG simple_1-1.c [2021-01-06 16:46:10,198 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 16:46:10,203 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-01-06 16:46:10,229 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-01-06 16:46:10,279 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 16:46:10,280 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 16:46:10,280 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 16:46:10,280 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 16:46:10,280 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 16:46:10,280 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 16:46:10,280 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 16:46:10,281 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 16:46:10,303 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states. [2021-01-06 16:46:10,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-01-06 16:46:10,310 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:46:10,311 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-01-06 16:46:10,311 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:46:10,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:46:10,320 INFO L82 PathProgramCache]: Analyzing trace with hash 889633835, now seen corresponding path program 1 times [2021-01-06 16:46:10,334 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:46:10,334 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859061291] [2021-01-06 16:46:10,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:46:10,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:46:10,689 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:46:10,690 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859061291] [2021-01-06 16:46:10,691 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 16:46:10,691 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 16:46:10,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604598233] [2021-01-06 16:46:10,708 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 16:46:10,709 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:46:10,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 16:46:10,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 16:46:10,750 INFO L87 Difference]: Start difference. First operand 10 states. Second operand 3 states. [2021-01-06 16:46:10,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:46:10,792 INFO L93 Difference]: Finished difference Result 18 states and 22 transitions. [2021-01-06 16:46:10,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 16:46:10,795 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 6 [2021-01-06 16:46:10,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:46:10,806 INFO L225 Difference]: With dead ends: 18 [2021-01-06 16:46:10,806 INFO L226 Difference]: Without dead ends: 8 [2021-01-06 16:46:10,810 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 16:46:10,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2021-01-06 16:46:10,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2021-01-06 16:46:10,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-01-06 16:46:10,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2021-01-06 16:46:10,850 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 6 [2021-01-06 16:46:10,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:46:10,851 INFO L481 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2021-01-06 16:46:10,851 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 16:46:10,851 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2021-01-06 16:46:10,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-01-06 16:46:10,852 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:46:10,852 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:46:10,852 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-06 16:46:10,853 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:46:10,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:46:10,854 INFO L82 PathProgramCache]: Analyzing trace with hash 1810510480, now seen corresponding path program 1 times [2021-01-06 16:46:10,854 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:46:10,854 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612549958] [2021-01-06 16:46:10,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:46:10,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:46:11,083 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:46:11,084 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612549958] [2021-01-06 16:46:11,086 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1457523840] [2021-01-06 16:46:11,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:46:11,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:46:11,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 5 conjunts are in the unsatisfiable core [2021-01-06 16:46:11,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:46:11,205 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:46:11,206 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:46:11,206 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-01-06 16:46:11,207 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865232187] [2021-01-06 16:46:11,208 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 16:46:11,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:46:11,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 16:46:11,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-01-06 16:46:11,210 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand 5 states. [2021-01-06 16:46:11,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:46:11,228 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2021-01-06 16:46:11,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-06 16:46:11,229 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 7 [2021-01-06 16:46:11,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:46:11,230 INFO L225 Difference]: With dead ends: 13 [2021-01-06 16:46:11,230 INFO L226 Difference]: Without dead ends: 9 [2021-01-06 16:46:11,231 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 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 16:46:11,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2021-01-06 16:46:11,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2021-01-06 16:46:11,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-01-06 16:46:11,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2021-01-06 16:46:11,234 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2021-01-06 16:46:11,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:46:11,235 INFO L481 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2021-01-06 16:46:11,235 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 16:46:11,235 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2021-01-06 16:46:11,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-01-06 16:46:11,236 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:46:11,236 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2021-01-06 16:46:11,449 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-01-06 16:46:11,450 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:46:11,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:46:11,452 INFO L82 PathProgramCache]: Analyzing trace with hash 292915403, now seen corresponding path program 2 times [2021-01-06 16:46:11,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:46:11,453 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119336609] [2021-01-06 16:46:11,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:46:11,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:46:11,574 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:46:11,574 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119336609] [2021-01-06 16:46:11,575 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [643257850] [2021-01-06 16:46:11,575 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:46:11,620 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:46:11,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:46:11,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 7 conjunts are in the unsatisfiable core [2021-01-06 16:46:11,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:46:11,684 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:46:11,684 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:46:11,685 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-01-06 16:46:11,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095263712] [2021-01-06 16:46:11,685 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-06 16:46:11,686 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:46:11,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-06 16:46:11,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-01-06 16:46:11,687 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 6 states. [2021-01-06 16:46:11,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:46:11,710 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2021-01-06 16:46:11,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 16:46:11,711 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 8 [2021-01-06 16:46:11,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:46:11,711 INFO L225 Difference]: With dead ends: 14 [2021-01-06 16:46:11,712 INFO L226 Difference]: Without dead ends: 10 [2021-01-06 16:46:11,712 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 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 16:46:11,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2021-01-06 16:46:11,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2021-01-06 16:46:11,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-01-06 16:46:11,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2021-01-06 16:46:11,716 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 8 [2021-01-06 16:46:11,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:46:11,716 INFO L481 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2021-01-06 16:46:11,716 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-06 16:46:11,716 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2021-01-06 16:46:11,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-01-06 16:46:11,717 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:46:11,717 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1] [2021-01-06 16:46:11,930 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:46:11,931 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:46:11,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:46:11,933 INFO L82 PathProgramCache]: Analyzing trace with hash 492108272, now seen corresponding path program 3 times [2021-01-06 16:46:11,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:46:11,934 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395841389] [2021-01-06 16:46:11,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:46:11,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:46:12,073 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:46:12,074 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395841389] [2021-01-06 16:46:12,074 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [578600075] [2021-01-06 16:46:12,074 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:46:12,134 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-01-06 16:46:12,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:46:12,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 16:46:12,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:46:12,216 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:46:12,217 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:46:12,217 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-01-06 16:46:12,218 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531694778] [2021-01-06 16:46:12,218 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-06 16:46:12,218 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:46:12,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-06 16:46:12,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-01-06 16:46:12,220 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand 7 states. [2021-01-06 16:46:12,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:46:12,251 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2021-01-06 16:46:12,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 16:46:12,252 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 9 [2021-01-06 16:46:12,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:46:12,252 INFO L225 Difference]: With dead ends: 15 [2021-01-06 16:46:12,252 INFO L226 Difference]: Without dead ends: 11 [2021-01-06 16:46:12,253 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 9 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 16:46:12,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2021-01-06 16:46:12,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2021-01-06 16:46:12,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2021-01-06 16:46:12,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2021-01-06 16:46:12,257 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 9 [2021-01-06 16:46:12,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:46:12,257 INFO L481 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2021-01-06 16:46:12,257 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-06 16:46:12,257 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2021-01-06 16:46:12,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-01-06 16:46:12,258 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:46:12,258 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2021-01-06 16:46:12,471 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:46:12,472 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:46:12,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:46:12,473 INFO L82 PathProgramCache]: Analyzing trace with hash -1922847381, now seen corresponding path program 4 times [2021-01-06 16:46:12,474 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:46:12,474 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246984679] [2021-01-06 16:46:12,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:46:12,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:46:12,633 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:46:12,636 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246984679] [2021-01-06 16:46:12,636 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2008681357] [2021-01-06 16:46:12,637 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:46:12,681 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 16:46:12,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:46:12,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 16:46:12,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:46:12,746 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:46:12,747 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:46:12,747 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-01-06 16:46:12,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034469405] [2021-01-06 16:46:12,748 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-06 16:46:12,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:46:12,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-06 16:46:12,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-01-06 16:46:12,749 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 8 states. [2021-01-06 16:46:12,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:46:12,788 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2021-01-06 16:46:12,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-01-06 16:46:12,789 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 10 [2021-01-06 16:46:12,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:46:12,789 INFO L225 Difference]: With dead ends: 16 [2021-01-06 16:46:12,790 INFO L226 Difference]: Without dead ends: 12 [2021-01-06 16:46:12,790 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-01-06 16:46:12,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2021-01-06 16:46:12,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2021-01-06 16:46:12,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2021-01-06 16:46:12,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2021-01-06 16:46:12,794 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2021-01-06 16:46:12,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:46:12,795 INFO L481 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2021-01-06 16:46:12,795 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-01-06 16:46:12,795 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2021-01-06 16:46:12,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-01-06 16:46:12,796 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:46:12,796 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1] [2021-01-06 16:46:13,010 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:46:13,011 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:46:13,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:46:13,013 INFO L82 PathProgramCache]: Analyzing trace with hash 522938704, now seen corresponding path program 5 times [2021-01-06 16:46:13,014 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:46:13,014 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433019125] [2021-01-06 16:46:13,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:46:13,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:46:13,149 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:46:13,150 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433019125] [2021-01-06 16:46:13,150 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [771256587] [2021-01-06 16:46:13,150 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:46:13,199 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-01-06 16:46:13,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:46:13,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 16:46:13,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:46:13,276 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:46:13,277 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:46:13,277 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-01-06 16:46:13,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246228277] [2021-01-06 16:46:13,278 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-01-06 16:46:13,278 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:46:13,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-01-06 16:46:13,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-01-06 16:46:13,280 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 9 states. [2021-01-06 16:46:13,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:46:13,344 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2021-01-06 16:46:13,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-06 16:46:13,345 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 11 [2021-01-06 16:46:13,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:46:13,347 INFO L225 Difference]: With dead ends: 17 [2021-01-06 16:46:13,347 INFO L226 Difference]: Without dead ends: 13 [2021-01-06 16:46:13,351 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 11 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 16:46:13,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2021-01-06 16:46:13,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2021-01-06 16:46:13,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2021-01-06 16:46:13,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2021-01-06 16:46:13,358 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2021-01-06 16:46:13,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:46:13,358 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2021-01-06 16:46:13,358 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-01-06 16:46:13,360 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2021-01-06 16:46:13,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-01-06 16:46:13,362 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:46:13,362 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1] [2021-01-06 16:46:13,575 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-01-06 16:46:13,576 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:46:13,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:46:13,577 INFO L82 PathProgramCache]: Analyzing trace with hash -967103989, now seen corresponding path program 6 times [2021-01-06 16:46:13,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:46:13,578 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41078842] [2021-01-06 16:46:13,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:46:13,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:46:13,736 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:46:13,737 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41078842] [2021-01-06 16:46:13,737 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [523446551] [2021-01-06 16:46:13,737 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:46:13,800 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-01-06 16:46:13,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:46:13,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 17 conjunts are in the unsatisfiable core [2021-01-06 16:46:13,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:46:13,894 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:46:13,895 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:46:13,895 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-01-06 16:46:13,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272254399] [2021-01-06 16:46:13,896 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-01-06 16:46:13,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:46:13,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-01-06 16:46:13,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-01-06 16:46:13,898 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 10 states. [2021-01-06 16:46:13,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:46:14,000 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2021-01-06 16:46:14,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 16:46:14,000 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 12 [2021-01-06 16:46:14,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:46:14,001 INFO L225 Difference]: With dead ends: 18 [2021-01-06 16:46:14,001 INFO L226 Difference]: Without dead ends: 14 [2021-01-06 16:46:14,002 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 10 SyntacticMatches, 3 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-01-06 16:46:14,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2021-01-06 16:46:14,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2021-01-06 16:46:14,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2021-01-06 16:46:14,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2021-01-06 16:46:14,005 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2021-01-06 16:46:14,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:46:14,006 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2021-01-06 16:46:14,006 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-01-06 16:46:14,006 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2021-01-06 16:46:14,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-01-06 16:46:14,006 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:46:14,006 INFO L422 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1] [2021-01-06 16:46:14,216 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:46:14,217 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:46:14,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:46:14,218 INFO L82 PathProgramCache]: Analyzing trace with hash 86212784, now seen corresponding path program 7 times [2021-01-06 16:46:14,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:46:14,219 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866327158] [2021-01-06 16:46:14,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:46:14,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:46:14,356 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:46:14,357 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866327158] [2021-01-06 16:46:14,357 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1459246905] [2021-01-06 16:46:14,357 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:46:14,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:46:14,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 17 conjunts are in the unsatisfiable core [2021-01-06 16:46:14,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:46:14,469 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:46:14,470 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:46:14,470 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-01-06 16:46:14,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203188807] [2021-01-06 16:46:14,471 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-06 16:46:14,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:46:14,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-06 16:46:14,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-01-06 16:46:14,472 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 11 states. [2021-01-06 16:46:14,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:46:14,561 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2021-01-06 16:46:14,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 16:46:14,562 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 13 [2021-01-06 16:46:14,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:46:14,562 INFO L225 Difference]: With dead ends: 19 [2021-01-06 16:46:14,563 INFO L226 Difference]: Without dead ends: 15 [2021-01-06 16:46:14,563 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 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 16:46:14,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-01-06 16:46:14,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2021-01-06 16:46:14,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2021-01-06 16:46:14,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2021-01-06 16:46:14,567 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2021-01-06 16:46:14,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:46:14,567 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2021-01-06 16:46:14,568 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-01-06 16:46:14,568 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2021-01-06 16:46:14,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 16:46:14,568 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:46:14,568 INFO L422 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1] [2021-01-06 16:46:14,781 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:46:14,782 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:46:14,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:46:14,783 INFO L82 PathProgramCache]: Analyzing trace with hash -1620705621, now seen corresponding path program 8 times [2021-01-06 16:46:14,784 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:46:14,784 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81915455] [2021-01-06 16:46:14,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:46:14,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:46:14,969 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:46:14,970 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81915455] [2021-01-06 16:46:14,970 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2068608082] [2021-01-06 16:46:14,970 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:46:15,005 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:46:15,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:46:15,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2021-01-06 16:46:15,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:46:15,079 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:46:15,080 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:46:15,080 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-01-06 16:46:15,080 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918011936] [2021-01-06 16:46:15,081 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-01-06 16:46:15,081 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:46:15,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-01-06 16:46:15,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-01-06 16:46:15,082 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 12 states. [2021-01-06 16:46:15,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:46:15,165 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2021-01-06 16:46:15,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 16:46:15,165 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 14 [2021-01-06 16:46:15,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:46:15,166 INFO L225 Difference]: With dead ends: 20 [2021-01-06 16:46:15,166 INFO L226 Difference]: Without dead ends: 16 [2021-01-06 16:46:15,167 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 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 16:46:15,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-01-06 16:46:15,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2021-01-06 16:46:15,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2021-01-06 16:46:15,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2021-01-06 16:46:15,171 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 14 [2021-01-06 16:46:15,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:46:15,171 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2021-01-06 16:46:15,171 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-01-06 16:46:15,171 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2021-01-06 16:46:15,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-01-06 16:46:15,172 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:46:15,172 INFO L422 BasicCegarLoop]: trace histogram [9, 1, 1, 1, 1, 1, 1] [2021-01-06 16:46:15,385 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-01-06 16:46:15,386 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:46:15,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:46:15,387 INFO L82 PathProgramCache]: Analyzing trace with hash 1299398672, now seen corresponding path program 9 times [2021-01-06 16:46:15,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:46:15,388 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890477041] [2021-01-06 16:46:15,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:46:15,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:46:15,577 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:46:15,577 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890477041] [2021-01-06 16:46:15,577 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [49611313] [2021-01-06 16:46:15,578 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:46:15,668 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-01-06 16:46:15,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:46:15,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 21 conjunts are in the unsatisfiable core [2021-01-06 16:46:15,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:46:15,723 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:46:15,724 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:46:15,724 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-01-06 16:46:15,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889139061] [2021-01-06 16:46:15,725 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-06 16:46:15,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:46:15,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-06 16:46:15,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-01-06 16:46:15,726 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 13 states. [2021-01-06 16:46:15,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:46:15,812 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2021-01-06 16:46:15,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 16:46:15,812 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 15 [2021-01-06 16:46:15,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:46:15,813 INFO L225 Difference]: With dead ends: 21 [2021-01-06 16:46:15,813 INFO L226 Difference]: Without dead ends: 17 [2021-01-06 16:46:15,814 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 15 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 16:46:15,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-01-06 16:46:15,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-01-06 16:46:15,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2021-01-06 16:46:15,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2021-01-06 16:46:15,817 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 15 [2021-01-06 16:46:15,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:46:15,818 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2021-01-06 16:46:15,818 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-01-06 16:46:15,818 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2021-01-06 16:46:15,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-01-06 16:46:15,818 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:46:15,819 INFO L422 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1] [2021-01-06 16:46:16,027 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:46:16,028 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:46:16,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:46:16,029 INFO L82 PathProgramCache]: Analyzing trace with hash 1628318539, now seen corresponding path program 10 times [2021-01-06 16:46:16,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:46:16,030 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265652840] [2021-01-06 16:46:16,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:46:16,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:46:16,249 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:46:16,250 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265652840] [2021-01-06 16:46:16,250 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [493305311] [2021-01-06 16:46:16,250 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:46:16,297 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 16:46:16,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:46:16,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 23 conjunts are in the unsatisfiable core [2021-01-06 16:46:16,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:46:16,351 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:46:16,351 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:46:16,351 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-01-06 16:46:16,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596206453] [2021-01-06 16:46:16,352 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-06 16:46:16,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:46:16,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-06 16:46:16,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-01-06 16:46:16,353 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 14 states. [2021-01-06 16:46:16,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:46:16,470 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2021-01-06 16:46:16,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-01-06 16:46:16,471 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 16 [2021-01-06 16:46:16,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:46:16,472 INFO L225 Difference]: With dead ends: 22 [2021-01-06 16:46:16,472 INFO L226 Difference]: Without dead ends: 18 [2021-01-06 16:46:16,472 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 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 16:46:16,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-01-06 16:46:16,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-01-06 16:46:16,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2021-01-06 16:46:16,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2021-01-06 16:46:16,476 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 16 [2021-01-06 16:46:16,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:46:16,477 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2021-01-06 16:46:16,477 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2021-01-06 16:46:16,477 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2021-01-06 16:46:16,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-01-06 16:46:16,477 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:46:16,477 INFO L422 BasicCegarLoop]: trace histogram [11, 1, 1, 1, 1, 1, 1] [2021-01-06 16:46:16,686 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:46:16,687 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:46:16,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:46:16,688 INFO L82 PathProgramCache]: Analyzing trace with hash -1060067472, now seen corresponding path program 11 times [2021-01-06 16:46:16,688 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:46:16,689 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930287797] [2021-01-06 16:46:16,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:46:16,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:46:16,884 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:46:16,885 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930287797] [2021-01-06 16:46:16,885 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [318725023] [2021-01-06 16:46:16,885 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:46:17,132 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-01-06 16:46:17,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:46:17,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 30 conjunts are in the unsatisfiable core [2021-01-06 16:46:17,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:46:17,270 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:46:17,270 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:46:17,270 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-01-06 16:46:17,271 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325246933] [2021-01-06 16:46:17,272 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-01-06 16:46:17,273 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:46:17,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-01-06 16:46:17,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-01-06 16:46:17,274 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 15 states. [2021-01-06 16:46:17,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:46:17,396 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2021-01-06 16:46:17,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-01-06 16:46:17,396 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 17 [2021-01-06 16:46:17,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:46:17,397 INFO L225 Difference]: With dead ends: 23 [2021-01-06 16:46:17,397 INFO L226 Difference]: Without dead ends: 19 [2021-01-06 16:46:17,398 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 6 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-01-06 16:46:17,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-01-06 16:46:17,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-01-06 16:46:17,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2021-01-06 16:46:17,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2021-01-06 16:46:17,401 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 17 [2021-01-06 16:46:17,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:46:17,403 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2021-01-06 16:46:17,403 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2021-01-06 16:46:17,403 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2021-01-06 16:46:17,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-01-06 16:46:17,404 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:46:17,404 INFO L422 BasicCegarLoop]: trace histogram [12, 1, 1, 1, 1, 1, 1] [2021-01-06 16:46:17,609 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-01-06 16:46:17,609 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:46:17,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:46:17,610 INFO L82 PathProgramCache]: Analyzing trace with hash 1499312107, now seen corresponding path program 12 times [2021-01-06 16:46:17,610 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:46:17,611 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161276958] [2021-01-06 16:46:17,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:46:17,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:46:17,860 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:46:17,861 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161276958] [2021-01-06 16:46:17,861 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2025187464] [2021-01-06 16:46:17,861 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:46:17,950 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-01-06 16:46:17,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:46:17,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 30 conjunts are in the unsatisfiable core [2021-01-06 16:46:17,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:46:18,082 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:46:18,083 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:46:18,083 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-01-06 16:46:18,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889124963] [2021-01-06 16:46:18,087 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-06 16:46:18,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:46:18,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-06 16:46:18,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-01-06 16:46:18,088 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 16 states. [2021-01-06 16:46:18,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:46:18,237 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2021-01-06 16:46:18,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-01-06 16:46:18,237 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 18 [2021-01-06 16:46:18,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:46:18,238 INFO L225 Difference]: With dead ends: 24 [2021-01-06 16:46:18,238 INFO L226 Difference]: Without dead ends: 20 [2021-01-06 16:46:18,238 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-01-06 16:46:18,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-01-06 16:46:18,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-01-06 16:46:18,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2021-01-06 16:46:18,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2021-01-06 16:46:18,242 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 18 [2021-01-06 16:46:18,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:46:18,243 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2021-01-06 16:46:18,243 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-01-06 16:46:18,243 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2021-01-06 16:46:18,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-01-06 16:46:18,244 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:46:18,244 INFO L422 BasicCegarLoop]: trace histogram [13, 1, 1, 1, 1, 1, 1] [2021-01-06 16:46:18,450 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-01-06 16:46:18,450 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:46:18,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:46:18,451 INFO L82 PathProgramCache]: Analyzing trace with hash -764299568, now seen corresponding path program 13 times [2021-01-06 16:46:18,451 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:46:18,452 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654166820] [2021-01-06 16:46:18,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:46:18,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:46:18,741 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:46:18,741 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654166820] [2021-01-06 16:46:18,741 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1939520201] [2021-01-06 16:46:18,741 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:46:18,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:46:18,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 29 conjunts are in the unsatisfiable core [2021-01-06 16:46:18,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:46:18,869 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:46:18,870 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:46:18,870 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-01-06 16:46:18,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529950217] [2021-01-06 16:46:18,871 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 16:46:18,872 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:46:18,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 16:46:18,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-01-06 16:46:18,873 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 17 states. [2021-01-06 16:46:19,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:46:19,044 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2021-01-06 16:46:19,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-01-06 16:46:19,045 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 19 [2021-01-06 16:46:19,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:46:19,046 INFO L225 Difference]: With dead ends: 25 [2021-01-06 16:46:19,046 INFO L226 Difference]: Without dead ends: 21 [2021-01-06 16:46:19,048 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 19 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 16:46:19,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-01-06 16:46:19,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2021-01-06 16:46:19,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2021-01-06 16:46:19,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2021-01-06 16:46:19,057 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 19 [2021-01-06 16:46:19,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:46:19,057 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2021-01-06 16:46:19,057 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 16:46:19,058 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2021-01-06 16:46:19,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-01-06 16:46:19,058 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:46:19,058 INFO L422 BasicCegarLoop]: trace histogram [14, 1, 1, 1, 1, 1, 1] [2021-01-06 16:46:19,271 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-01-06 16:46:19,271 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:46:19,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:46:19,272 INFO L82 PathProgramCache]: Analyzing trace with hash 2078182539, now seen corresponding path program 14 times [2021-01-06 16:46:19,272 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:46:19,272 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926813502] [2021-01-06 16:46:19,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:46:19,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:46:19,567 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:46:19,567 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926813502] [2021-01-06 16:46:19,567 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028591086] [2021-01-06 16:46:19,568 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:46:19,623 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:46:19,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:46:19,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 31 conjunts are in the unsatisfiable core [2021-01-06 16:46:19,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:46:19,715 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:46:19,715 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:46:19,715 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-01-06 16:46:19,716 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138542226] [2021-01-06 16:46:19,716 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-06 16:46:19,716 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:46:19,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-06 16:46:19,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-01-06 16:46:19,717 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 18 states. [2021-01-06 16:46:19,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:46:19,881 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2021-01-06 16:46:19,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-01-06 16:46:19,882 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 20 [2021-01-06 16:46:19,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:46:19,882 INFO L225 Difference]: With dead ends: 26 [2021-01-06 16:46:19,882 INFO L226 Difference]: Without dead ends: 22 [2021-01-06 16:46:19,883 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 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 16:46:19,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-01-06 16:46:19,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2021-01-06 16:46:19,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2021-01-06 16:46:19,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2021-01-06 16:46:19,887 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 20 [2021-01-06 16:46:19,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:46:19,887 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2021-01-06 16:46:19,887 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2021-01-06 16:46:19,887 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2021-01-06 16:46:19,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-01-06 16:46:19,888 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:46:19,888 INFO L422 BasicCegarLoop]: trace histogram [15, 1, 1, 1, 1, 1, 1] [2021-01-06 16:46:20,101 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:46:20,102 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:46:20,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:46:20,103 INFO L82 PathProgramCache]: Analyzing trace with hash 814640, now seen corresponding path program 15 times [2021-01-06 16:46:20,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:46:20,103 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625365522] [2021-01-06 16:46:20,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:46:20,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:46:20,386 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:46:20,387 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625365522] [2021-01-06 16:46:20,387 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1230355609] [2021-01-06 16:46:20,387 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:46:20,549 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-01-06 16:46:20,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:46:20,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 35 conjunts are in the unsatisfiable core [2021-01-06 16:46:20,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:46:20,657 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:46:20,657 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:46:20,657 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-01-06 16:46:20,658 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601805807] [2021-01-06 16:46:20,658 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-06 16:46:20,658 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:46:20,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-06 16:46:20,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-01-06 16:46:20,659 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 19 states. [2021-01-06 16:46:20,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:46:20,867 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2021-01-06 16:46:20,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-01-06 16:46:20,867 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 21 [2021-01-06 16:46:20,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:46:20,868 INFO L225 Difference]: With dead ends: 27 [2021-01-06 16:46:20,868 INFO L226 Difference]: Without dead ends: 23 [2021-01-06 16:46:20,869 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-01-06 16:46:20,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-01-06 16:46:20,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2021-01-06 16:46:20,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2021-01-06 16:46:20,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2021-01-06 16:46:20,873 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 21 [2021-01-06 16:46:20,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:46:20,873 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2021-01-06 16:46:20,873 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-06 16:46:20,873 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2021-01-06 16:46:20,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-01-06 16:46:20,874 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:46:20,874 INFO L422 BasicCegarLoop]: trace histogram [16, 1, 1, 1, 1, 1, 1] [2021-01-06 16:46:21,077 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-01-06 16:46:21,078 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:46:21,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:46:21,079 INFO L82 PathProgramCache]: Analyzing trace with hash 26919211, now seen corresponding path program 16 times [2021-01-06 16:46:21,079 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:46:21,079 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647577991] [2021-01-06 16:46:21,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:46:21,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:46:21,413 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:46:21,413 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647577991] [2021-01-06 16:46:21,413 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2069914424] [2021-01-06 16:46:21,413 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:46:21,468 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 16:46:21,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:46:21,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 35 conjunts are in the unsatisfiable core [2021-01-06 16:46:21,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:46:21,539 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:46:21,540 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:46:21,540 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2021-01-06 16:46:21,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111251218] [2021-01-06 16:46:21,542 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-01-06 16:46:21,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:46:21,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-01-06 16:46:21,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2021-01-06 16:46:21,543 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 20 states. [2021-01-06 16:46:21,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:46:21,749 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2021-01-06 16:46:21,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-01-06 16:46:21,750 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 22 [2021-01-06 16:46:21,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:46:21,750 INFO L225 Difference]: With dead ends: 28 [2021-01-06 16:46:21,751 INFO L226 Difference]: Without dead ends: 24 [2021-01-06 16:46:21,751 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2021-01-06 16:46:21,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-01-06 16:46:21,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-01-06 16:46:21,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2021-01-06 16:46:21,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2021-01-06 16:46:21,755 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 22 [2021-01-06 16:46:21,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:46:21,755 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2021-01-06 16:46:21,755 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2021-01-06 16:46:21,756 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2021-01-06 16:46:21,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-01-06 16:46:21,756 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:46:21,756 INFO L422 BasicCegarLoop]: trace histogram [17, 1, 1, 1, 1, 1, 1] [2021-01-06 16:46:21,970 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-01-06 16:46:21,971 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:46:21,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:46:21,971 INFO L82 PathProgramCache]: Analyzing trace with hash 836160912, now seen corresponding path program 17 times [2021-01-06 16:46:21,972 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:46:21,972 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166679087] [2021-01-06 16:46:21,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:46:21,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:46:22,319 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:46:22,320 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166679087] [2021-01-06 16:46:22,320 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1962176567] [2021-01-06 16:46:22,320 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:46:22,922 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-01-06 16:46:22,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:46:22,924 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 52 conjunts are in the unsatisfiable core [2021-01-06 16:46:22,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:46:23,290 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:46:23,290 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:46:23,291 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2021-01-06 16:46:23,291 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068116345] [2021-01-06 16:46:23,291 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-06 16:46:23,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:46:23,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-06 16:46:23,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-01-06 16:46:23,292 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 21 states. [2021-01-06 16:46:23,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:46:23,553 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2021-01-06 16:46:23,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-01-06 16:46:23,554 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 23 [2021-01-06 16:46:23,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:46:23,554 INFO L225 Difference]: With dead ends: 29 [2021-01-06 16:46:23,554 INFO L226 Difference]: Without dead ends: 25 [2021-01-06 16:46:23,555 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 8 SyntacticMatches, 16 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-01-06 16:46:23,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-01-06 16:46:23,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2021-01-06 16:46:23,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2021-01-06 16:46:23,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2021-01-06 16:46:23,558 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 23 [2021-01-06 16:46:23,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:46:23,559 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2021-01-06 16:46:23,559 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2021-01-06 16:46:23,559 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2021-01-06 16:46:23,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-01-06 16:46:23,559 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:46:23,560 INFO L422 BasicCegarLoop]: trace histogram [18, 1, 1, 1, 1, 1, 1] [2021-01-06 16:46:23,762 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-01-06 16:46:23,763 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:46:23,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:46:23,764 INFO L82 PathProgramCache]: Analyzing trace with hash 152849867, now seen corresponding path program 18 times [2021-01-06 16:46:23,764 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:46:23,764 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566279018] [2021-01-06 16:46:23,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:46:23,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:46:24,129 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:46:24,129 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566279018] [2021-01-06 16:46:24,129 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [204465190] [2021-01-06 16:46:24,129 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:46:24,307 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-01-06 16:46:24,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:46:24,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 45 conjunts are in the unsatisfiable core [2021-01-06 16:46:24,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:46:24,536 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:46:24,536 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:46:24,537 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-01-06 16:46:24,537 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215395321] [2021-01-06 16:46:24,539 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-01-06 16:46:24,540 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:46:24,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-01-06 16:46:24,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2021-01-06 16:46:24,541 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 22 states. [2021-01-06 16:46:24,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:46:24,821 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2021-01-06 16:46:24,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-01-06 16:46:24,821 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 24 [2021-01-06 16:46:24,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:46:24,822 INFO L225 Difference]: With dead ends: 30 [2021-01-06 16:46:24,822 INFO L226 Difference]: Without dead ends: 26 [2021-01-06 16:46:24,823 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 19 SyntacticMatches, 6 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2021-01-06 16:46:24,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-01-06 16:46:24,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2021-01-06 16:46:24,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2021-01-06 16:46:24,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2021-01-06 16:46:24,826 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 24 [2021-01-06 16:46:24,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:46:24,826 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2021-01-06 16:46:24,827 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2021-01-06 16:46:24,827 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2021-01-06 16:46:24,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-01-06 16:46:24,827 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:46:24,827 INFO L422 BasicCegarLoop]: trace histogram [19, 1, 1, 1, 1, 1, 1] [2021-01-06 16:46:25,027 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:46:25,028 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:46:25,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:46:25,029 INFO L82 PathProgramCache]: Analyzing trace with hash 445043952, now seen corresponding path program 19 times [2021-01-06 16:46:25,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:46:25,030 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298033099] [2021-01-06 16:46:25,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:46:25,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:46:25,490 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:46:25,490 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298033099] [2021-01-06 16:46:25,490 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1381594423] [2021-01-06 16:46:25,491 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:46:25,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:46:25,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 41 conjunts are in the unsatisfiable core [2021-01-06 16:46:25,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:46:25,607 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:46:25,607 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:46:25,607 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2021-01-06 16:46:25,608 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927994495] [2021-01-06 16:46:25,608 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-01-06 16:46:25,608 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:46:25,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-01-06 16:46:25,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2021-01-06 16:46:25,609 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 23 states. [2021-01-06 16:46:25,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:46:25,894 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2021-01-06 16:46:25,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-01-06 16:46:25,895 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 25 [2021-01-06 16:46:25,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:46:25,896 INFO L225 Difference]: With dead ends: 31 [2021-01-06 16:46:25,896 INFO L226 Difference]: Without dead ends: 27 [2021-01-06 16:46:25,897 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 25 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 16:46:25,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-01-06 16:46:25,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-01-06 16:46:25,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2021-01-06 16:46:25,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2021-01-06 16:46:25,901 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 25 [2021-01-06 16:46:25,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:46:25,901 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2021-01-06 16:46:25,901 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2021-01-06 16:46:25,901 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2021-01-06 16:46:25,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-01-06 16:46:25,902 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:46:25,902 INFO L422 BasicCegarLoop]: trace histogram [20, 1, 1, 1, 1, 1, 1] [2021-01-06 16:46:26,103 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:46:26,104 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:46:26,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:46:26,105 INFO L82 PathProgramCache]: Analyzing trace with hash 913125995, now seen corresponding path program 20 times [2021-01-06 16:46:26,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:46:26,105 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158327414] [2021-01-06 16:46:26,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:46:26,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:46:26,555 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:46:26,555 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158327414] [2021-01-06 16:46:26,556 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1959871266] [2021-01-06 16:46:26,556 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:46:26,604 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:46:26,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:46:26,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 43 conjunts are in the unsatisfiable core [2021-01-06 16:46:26,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:46:26,692 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:46:26,693 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:46:26,693 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2021-01-06 16:46:26,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128768803] [2021-01-06 16:46:26,695 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-01-06 16:46:26,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:46:26,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-01-06 16:46:26,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2021-01-06 16:46:26,696 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 24 states. [2021-01-06 16:46:27,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:46:27,011 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2021-01-06 16:46:27,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-01-06 16:46:27,011 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 26 [2021-01-06 16:46:27,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:46:27,012 INFO L225 Difference]: With dead ends: 32 [2021-01-06 16:46:27,012 INFO L226 Difference]: Without dead ends: 28 [2021-01-06 16:46:27,013 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 26 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 16:46:27,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-01-06 16:46:27,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-01-06 16:46:27,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2021-01-06 16:46:27,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2021-01-06 16:46:27,017 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 26 [2021-01-06 16:46:27,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:46:27,017 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2021-01-06 16:46:27,017 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2021-01-06 16:46:27,017 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2021-01-06 16:46:27,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-01-06 16:46:27,018 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:46:27,018 INFO L422 BasicCegarLoop]: trace histogram [21, 1, 1, 1, 1, 1, 1] [2021-01-06 16:46:27,231 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-01-06 16:46:27,231 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:46:27,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:46:27,232 INFO L82 PathProgramCache]: Analyzing trace with hash -1756199856, now seen corresponding path program 21 times [2021-01-06 16:46:27,232 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:46:27,233 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733891064] [2021-01-06 16:46:27,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:46:27,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:46:27,736 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:46:27,736 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733891064] [2021-01-06 16:46:27,736 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1387373762] [2021-01-06 16:46:27,737 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:46:27,987 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-01-06 16:46:27,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:46:27,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 51 conjunts are in the unsatisfiable core [2021-01-06 16:46:27,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:46:28,275 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:46:28,275 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:46:28,275 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2021-01-06 16:46:28,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314527090] [2021-01-06 16:46:28,288 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-01-06 16:46:28,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:46:28,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-01-06 16:46:28,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2021-01-06 16:46:28,288 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 25 states. [2021-01-06 16:46:28,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:46:28,653 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2021-01-06 16:46:28,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-01-06 16:46:28,656 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 27 [2021-01-06 16:46:28,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:46:28,657 INFO L225 Difference]: With dead ends: 33 [2021-01-06 16:46:28,657 INFO L226 Difference]: Without dead ends: 29 [2021-01-06 16:46:28,657 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 22 SyntacticMatches, 6 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2021-01-06 16:46:28,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-01-06 16:46:28,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-01-06 16:46:28,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2021-01-06 16:46:28,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2021-01-06 16:46:28,661 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 27 [2021-01-06 16:46:28,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:46:28,661 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2021-01-06 16:46:28,661 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2021-01-06 16:46:28,661 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2021-01-06 16:46:28,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-01-06 16:46:28,662 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:46:28,662 INFO L422 BasicCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1] [2021-01-06 16:46:28,867 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-01-06 16:46:28,867 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:46:28,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:46:28,868 INFO L82 PathProgramCache]: Analyzing trace with hash 1394044683, now seen corresponding path program 22 times [2021-01-06 16:46:28,868 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:46:28,868 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085367796] [2021-01-06 16:46:28,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:46:28,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:46:29,334 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:46:29,334 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085367796] [2021-01-06 16:46:29,334 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1848691989] [2021-01-06 16:46:29,334 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:46:29,383 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 16:46:29,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:46:29,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 47 conjunts are in the unsatisfiable core [2021-01-06 16:46:29,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:46:29,467 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:46:29,467 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:46:29,468 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2021-01-06 16:46:29,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867267631] [2021-01-06 16:46:29,469 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-01-06 16:46:29,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:46:29,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-01-06 16:46:29,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=578, Unknown=0, NotChecked=0, Total=650 [2021-01-06 16:46:29,471 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 26 states. [2021-01-06 16:46:29,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:46:29,830 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2021-01-06 16:46:29,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-01-06 16:46:29,830 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 28 [2021-01-06 16:46:29,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:46:29,831 INFO L225 Difference]: With dead ends: 34 [2021-01-06 16:46:29,831 INFO L226 Difference]: Without dead ends: 30 [2021-01-06 16:46:29,832 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 28 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 16:46:29,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-01-06 16:46:29,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2021-01-06 16:46:29,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2021-01-06 16:46:29,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2021-01-06 16:46:29,837 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 28 [2021-01-06 16:46:29,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:46:29,837 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2021-01-06 16:46:29,837 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2021-01-06 16:46:29,837 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2021-01-06 16:46:29,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-01-06 16:46:29,838 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:46:29,838 INFO L422 BasicCegarLoop]: trace histogram [23, 1, 1, 1, 1, 1, 1] [2021-01-06 16:46:30,053 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:46:30,054 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:46:30,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:46:30,054 INFO L82 PathProgramCache]: Analyzing trace with hash 267377584, now seen corresponding path program 23 times [2021-01-06 16:46:30,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:46:30,055 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960153294] [2021-01-06 16:46:30,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:46:30,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:46:30,652 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:46:30,652 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960153294] [2021-01-06 16:46:30,652 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [505618808] [2021-01-06 16:46:30,653 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:46:33,126 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-01-06 16:46:33,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:46:33,130 WARN L261 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 71 conjunts are in the unsatisfiable core [2021-01-06 16:46:33,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:46:33,741 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:46:33,741 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:46:33,741 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2021-01-06 16:46:33,741 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80236584] [2021-01-06 16:46:33,742 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-01-06 16:46:33,742 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:46:33,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-01-06 16:46:33,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2021-01-06 16:46:33,743 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 27 states. [2021-01-06 16:46:34,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:46:34,157 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2021-01-06 16:46:34,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-01-06 16:46:34,157 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 29 [2021-01-06 16:46:34,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:46:34,158 INFO L225 Difference]: With dead ends: 35 [2021-01-06 16:46:34,158 INFO L226 Difference]: Without dead ends: 31 [2021-01-06 16:46:34,159 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 8 SyntacticMatches, 22 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2021-01-06 16:46:34,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-01-06 16:46:34,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2021-01-06 16:46:34,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2021-01-06 16:46:34,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2021-01-06 16:46:34,162 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 29 [2021-01-06 16:46:34,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:46:34,162 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2021-01-06 16:46:34,162 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2021-01-06 16:46:34,162 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2021-01-06 16:46:34,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-01-06 16:46:34,163 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:46:34,163 INFO L422 BasicCegarLoop]: trace histogram [24, 1, 1, 1, 1, 1, 1] [2021-01-06 16:46:34,364 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-01-06 16:46:34,364 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:46:34,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:46:34,365 INFO L82 PathProgramCache]: Analyzing trace with hash -299564117, now seen corresponding path program 24 times [2021-01-06 16:46:34,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:46:34,366 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138036597] [2021-01-06 16:46:34,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:46:34,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:46:34,946 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:46:34,946 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138036597] [2021-01-06 16:46:34,946 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1206346456] [2021-01-06 16:46:34,947 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:46:35,433 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-01-06 16:46:35,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:46:35,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 51 conjunts are in the unsatisfiable core [2021-01-06 16:46:35,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:46:35,532 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:46:35,532 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:46:35,533 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2021-01-06 16:46:35,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984271774] [2021-01-06 16:46:35,533 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-01-06 16:46:35,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:46:35,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-01-06 16:46:35,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=678, Unknown=0, NotChecked=0, Total=756 [2021-01-06 16:46:35,534 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 28 states. [2021-01-06 16:46:35,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:46:35,912 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2021-01-06 16:46:35,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-01-06 16:46:35,912 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 30 [2021-01-06 16:46:35,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:46:35,913 INFO L225 Difference]: With dead ends: 36 [2021-01-06 16:46:35,913 INFO L226 Difference]: Without dead ends: 32 [2021-01-06 16:46:35,914 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=78, Invalid=678, Unknown=0, NotChecked=0, Total=756 [2021-01-06 16:46:35,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-01-06 16:46:35,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-01-06 16:46:35,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2021-01-06 16:46:35,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2021-01-06 16:46:35,917 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 30 [2021-01-06 16:46:35,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:46:35,917 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2021-01-06 16:46:35,918 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2021-01-06 16:46:35,918 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2021-01-06 16:46:35,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-01-06 16:46:35,918 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:46:35,918 INFO L422 BasicCegarLoop]: trace histogram [25, 1, 1, 1, 1, 1, 1] [2021-01-06 16:46:36,121 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:46:36,122 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:46:36,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:46:36,123 INFO L82 PathProgramCache]: Analyzing trace with hash -694887664, now seen corresponding path program 25 times [2021-01-06 16:46:36,123 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:46:36,124 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894052916] [2021-01-06 16:46:36,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:46:36,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:46:36,770 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:46:36,770 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894052916] [2021-01-06 16:46:36,770 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2089604337] [2021-01-06 16:46:36,770 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:46:36,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:46:36,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 53 conjunts are in the unsatisfiable core [2021-01-06 16:46:36,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:46:36,900 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:46:36,900 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:46:36,900 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2021-01-06 16:46:36,901 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524382507] [2021-01-06 16:46:36,901 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-01-06 16:46:36,901 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:46:36,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-01-06 16:46:36,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=731, Unknown=0, NotChecked=0, Total=812 [2021-01-06 16:46:36,902 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 29 states. [2021-01-06 16:46:37,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:46:37,435 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2021-01-06 16:46:37,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-01-06 16:46:37,437 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 31 [2021-01-06 16:46:37,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:46:37,437 INFO L225 Difference]: With dead ends: 37 [2021-01-06 16:46:37,437 INFO L226 Difference]: Without dead ends: 33 [2021-01-06 16:46:37,437 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=81, Invalid=731, Unknown=0, NotChecked=0, Total=812 [2021-01-06 16:46:37,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-01-06 16:46:37,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-01-06 16:46:37,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2021-01-06 16:46:37,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2021-01-06 16:46:37,441 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 31 [2021-01-06 16:46:37,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:46:37,442 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2021-01-06 16:46:37,442 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2021-01-06 16:46:37,442 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2021-01-06 16:46:37,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-01-06 16:46:37,442 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:46:37,442 INFO L422 BasicCegarLoop]: trace histogram [26, 1, 1, 1, 1, 1, 1] [2021-01-06 16:46:37,647 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-01-06 16:46:37,648 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:46:37,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:46:37,648 INFO L82 PathProgramCache]: Analyzing trace with hash -65015733, now seen corresponding path program 26 times [2021-01-06 16:46:37,648 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:46:37,649 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204276496] [2021-01-06 16:46:37,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:46:37,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:46:38,381 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:46:38,381 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204276496] [2021-01-06 16:46:38,382 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [157338627] [2021-01-06 16:46:38,382 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:46:38,435 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:46:38,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:46:38,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 55 conjunts are in the unsatisfiable core [2021-01-06 16:46:38,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:46:38,532 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:46:38,532 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:46:38,532 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2021-01-06 16:46:38,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819656776] [2021-01-06 16:46:38,533 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-01-06 16:46:38,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:46:38,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-01-06 16:46:38,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=786, Unknown=0, NotChecked=0, Total=870 [2021-01-06 16:46:38,534 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 30 states. [2021-01-06 16:46:39,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:46:39,105 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2021-01-06 16:46:39,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-01-06 16:46:39,106 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 32 [2021-01-06 16:46:39,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:46:39,106 INFO L225 Difference]: With dead ends: 38 [2021-01-06 16:46:39,106 INFO L226 Difference]: Without dead ends: 34 [2021-01-06 16:46:39,107 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 32 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 16:46:39,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-01-06 16:46:39,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2021-01-06 16:46:39,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2021-01-06 16:46:39,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2021-01-06 16:46:39,111 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 32 [2021-01-06 16:46:39,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:46:39,111 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2021-01-06 16:46:39,112 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2021-01-06 16:46:39,112 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2021-01-06 16:46:39,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-01-06 16:46:39,112 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:46:39,112 INFO L422 BasicCegarLoop]: trace histogram [27, 1, 1, 1, 1, 1, 1] [2021-01-06 16:46:39,315 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-01-06 16:46:39,316 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:46:39,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:46:39,317 INFO L82 PathProgramCache]: Analyzing trace with hash -2013822352, now seen corresponding path program 27 times [2021-01-06 16:46:39,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:46:39,318 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300430993] [2021-01-06 16:46:39,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:46:39,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:46:40,069 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:46:40,069 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300430993] [2021-01-06 16:46:40,069 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [839617034] [2021-01-06 16:46:40,070 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:46:41,041 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-01-06 16:46:41,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:46:41,045 WARN L261 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 78 conjunts are in the unsatisfiable core [2021-01-06 16:46:41,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:46:41,714 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:46:41,715 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:46:41,715 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2021-01-06 16:46:41,715 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523089210] [2021-01-06 16:46:41,716 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-01-06 16:46:41,716 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:46:41,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-01-06 16:46:41,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=843, Unknown=0, NotChecked=0, Total=930 [2021-01-06 16:46:41,717 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand 31 states. [2021-01-06 16:46:42,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:46:42,324 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2021-01-06 16:46:42,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-01-06 16:46:42,325 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 33 [2021-01-06 16:46:42,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:46:42,326 INFO L225 Difference]: With dead ends: 39 [2021-01-06 16:46:42,326 INFO L226 Difference]: Without dead ends: 35 [2021-01-06 16:46:42,326 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 18 SyntacticMatches, 16 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=87, Invalid=843, Unknown=0, NotChecked=0, Total=930 [2021-01-06 16:46:42,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-01-06 16:46:42,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-01-06 16:46:42,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2021-01-06 16:46:42,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2021-01-06 16:46:42,330 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 33 [2021-01-06 16:46:42,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:46:42,330 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2021-01-06 16:46:42,330 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2021-01-06 16:46:42,330 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2021-01-06 16:46:42,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-01-06 16:46:42,331 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:46:42,331 INFO L422 BasicCegarLoop]: trace histogram [28, 1, 1, 1, 1, 1, 1] [2021-01-06 16:46:42,531 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-01-06 16:46:42,532 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:46:42,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:46:42,532 INFO L82 PathProgramCache]: Analyzing trace with hash 1997681899, now seen corresponding path program 28 times [2021-01-06 16:46:42,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:46:42,533 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572509328] [2021-01-06 16:46:42,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:46:42,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:46:43,295 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:46:43,295 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572509328] [2021-01-06 16:46:43,295 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2023147584] [2021-01-06 16:46:43,295 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:46:43,341 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 16:46:43,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:46:43,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 59 conjunts are in the unsatisfiable core [2021-01-06 16:46:43,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:46:43,436 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:46:43,436 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:46:43,436 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2021-01-06 16:46:43,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862130265] [2021-01-06 16:46:43,437 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-01-06 16:46:43,437 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:46:43,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-01-06 16:46:43,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=902, Unknown=0, NotChecked=0, Total=992 [2021-01-06 16:46:43,438 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 32 states. [2021-01-06 16:46:44,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:46:44,041 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2021-01-06 16:46:44,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-01-06 16:46:44,042 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 34 [2021-01-06 16:46:44,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:46:44,042 INFO L225 Difference]: With dead ends: 40 [2021-01-06 16:46:44,042 INFO L226 Difference]: Without dead ends: 36 [2021-01-06 16:46:44,043 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 34 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 16:46:44,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-01-06 16:46:44,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2021-01-06 16:46:44,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2021-01-06 16:46:44,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2021-01-06 16:46:44,048 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 34 [2021-01-06 16:46:44,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:46:44,048 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2021-01-06 16:46:44,048 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2021-01-06 16:46:44,048 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2021-01-06 16:46:44,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-01-06 16:46:44,049 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:46:44,049 INFO L422 BasicCegarLoop]: trace histogram [29, 1, 1, 1, 1, 1, 1] [2021-01-06 16:46:44,251 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-01-06 16:46:44,254 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:46:44,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:46:44,255 INFO L82 PathProgramCache]: Analyzing trace with hash 1800262096, now seen corresponding path program 29 times [2021-01-06 16:46:44,255 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:46:44,255 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697105618] [2021-01-06 16:46:44,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:46:44,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:46:45,112 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:46:45,112 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697105618] [2021-01-06 16:46:45,112 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [308088530] [2021-01-06 16:46:45,112 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:46:54,077 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2021-01-06 16:46:54,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:46:54,086 WARN L261 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 90 conjunts are in the unsatisfiable core [2021-01-06 16:46:54,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:46:55,100 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:46:55,101 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:46:55,101 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2021-01-06 16:46:55,101 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698922193] [2021-01-06 16:46:55,101 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-01-06 16:46:55,101 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:46:55,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-01-06 16:46:55,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=963, Unknown=0, NotChecked=0, Total=1056 [2021-01-06 16:46:55,102 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand 33 states. [2021-01-06 16:46:55,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:46:55,787 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2021-01-06 16:46:55,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-01-06 16:46:55,788 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 35 [2021-01-06 16:46:55,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:46:55,789 INFO L225 Difference]: With dead ends: 41 [2021-01-06 16:46:55,789 INFO L226 Difference]: Without dead ends: 37 [2021-01-06 16:46:55,790 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 8 SyntacticMatches, 28 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=93, Invalid=963, Unknown=0, NotChecked=0, Total=1056 [2021-01-06 16:46:55,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-01-06 16:46:55,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2021-01-06 16:46:55,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2021-01-06 16:46:55,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2021-01-06 16:46:55,794 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 35 [2021-01-06 16:46:55,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:46:55,794 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2021-01-06 16:46:55,794 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2021-01-06 16:46:55,794 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2021-01-06 16:46:55,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-01-06 16:46:55,795 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:46:55,795 INFO L422 BasicCegarLoop]: trace histogram [30, 1, 1, 1, 1, 1, 1] [2021-01-06 16:46:55,999 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:46:56,000 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:46:56,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:46:56,001 INFO L82 PathProgramCache]: Analyzing trace with hash -24784501, now seen corresponding path program 30 times [2021-01-06 16:46:56,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:46:56,001 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456010906] [2021-01-06 16:46:56,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:46:56,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:46:56,908 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:46:56,908 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456010906] [2021-01-06 16:46:56,908 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1775693932] [2021-01-06 16:46:56,909 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:46:58,906 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2021-01-06 16:46:58,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:46:58,910 WARN L261 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 77 conjunts are in the unsatisfiable core [2021-01-06 16:46:58,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:46:59,599 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:46:59,599 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:46:59,599 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2021-01-06 16:46:59,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123335891] [2021-01-06 16:46:59,599 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-01-06 16:46:59,600 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:46:59,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-01-06 16:46:59,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=1026, Unknown=0, NotChecked=0, Total=1122 [2021-01-06 16:46:59,601 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 34 states. [2021-01-06 16:47:00,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:47:00,320 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2021-01-06 16:47:00,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-01-06 16:47:00,321 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 36 [2021-01-06 16:47:00,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:47:00,321 INFO L225 Difference]: With dead ends: 42 [2021-01-06 16:47:00,321 INFO L226 Difference]: Without dead ends: 38 [2021-01-06 16:47:00,322 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 23 SyntacticMatches, 14 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=96, Invalid=1026, Unknown=0, NotChecked=0, Total=1122 [2021-01-06 16:47:00,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-01-06 16:47:00,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-01-06 16:47:00,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2021-01-06 16:47:00,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2021-01-06 16:47:00,326 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 36 [2021-01-06 16:47:00,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:47:00,327 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2021-01-06 16:47:00,327 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2021-01-06 16:47:00,327 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2021-01-06 16:47:00,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-01-06 16:47:00,327 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:47:00,327 INFO L422 BasicCegarLoop]: trace histogram [31, 1, 1, 1, 1, 1, 1] [2021-01-06 16:47:00,531 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:47:00,531 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:47:00,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:47:00,532 INFO L82 PathProgramCache]: Analyzing trace with hash -766654160, now seen corresponding path program 31 times [2021-01-06 16:47:00,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:47:00,532 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545005202] [2021-01-06 16:47:00,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:47:00,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:47:01,443 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:47:01,443 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545005202] [2021-01-06 16:47:01,443 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1115873914] [2021-01-06 16:47:01,443 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:47:01,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:47:01,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 65 conjunts are in the unsatisfiable core [2021-01-06 16:47:01,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:47:01,586 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:47:01,587 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:47:01,587 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2021-01-06 16:47:01,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820774196] [2021-01-06 16:47:01,587 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-01-06 16:47:01,587 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:47:01,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-01-06 16:47:01,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=1091, Unknown=0, NotChecked=0, Total=1190 [2021-01-06 16:47:01,588 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 35 states. [2021-01-06 16:47:02,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:47:02,373 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2021-01-06 16:47:02,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-01-06 16:47:02,374 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 37 [2021-01-06 16:47:02,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:47:02,375 INFO L225 Difference]: With dead ends: 43 [2021-01-06 16:47:02,375 INFO L226 Difference]: Without dead ends: 39 [2021-01-06 16:47:02,375 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 37 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 16:47:02,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-01-06 16:47:02,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2021-01-06 16:47:02,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2021-01-06 16:47:02,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2021-01-06 16:47:02,380 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 37 [2021-01-06 16:47:02,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:47:02,380 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2021-01-06 16:47:02,380 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2021-01-06 16:47:02,380 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2021-01-06 16:47:02,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-01-06 16:47:02,381 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:47:02,381 INFO L422 BasicCegarLoop]: trace histogram [32, 1, 1, 1, 1, 1, 1] [2021-01-06 16:47:02,594 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:47:02,595 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:47:02,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:47:02,595 INFO L82 PathProgramCache]: Analyzing trace with hash 2005190187, now seen corresponding path program 32 times [2021-01-06 16:47:02,596 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:47:02,596 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789432699] [2021-01-06 16:47:02,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:47:02,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:47:03,549 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:47:03,549 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789432699] [2021-01-06 16:47:03,549 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [527337314] [2021-01-06 16:47:03,550 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:47:03,598 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:47:03,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:47:03,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 67 conjunts are in the unsatisfiable core [2021-01-06 16:47:03,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:47:03,701 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:47:03,702 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:47:03,702 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2021-01-06 16:47:03,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428431382] [2021-01-06 16:47:03,702 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-01-06 16:47:03,702 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:47:03,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-01-06 16:47:03,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=1158, Unknown=0, NotChecked=0, Total=1260 [2021-01-06 16:47:03,703 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 36 states. [2021-01-06 16:47:04,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:47:04,512 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2021-01-06 16:47:04,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-01-06 16:47:04,512 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 38 [2021-01-06 16:47:04,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:47:04,513 INFO L225 Difference]: With dead ends: 44 [2021-01-06 16:47:04,513 INFO L226 Difference]: Without dead ends: 40 [2021-01-06 16:47:04,514 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=102, Invalid=1158, Unknown=0, NotChecked=0, Total=1260 [2021-01-06 16:47:04,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-01-06 16:47:04,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2021-01-06 16:47:04,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2021-01-06 16:47:04,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2021-01-06 16:47:04,519 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 38 [2021-01-06 16:47:04,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:47:04,519 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2021-01-06 16:47:04,520 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2021-01-06 16:47:04,520 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2021-01-06 16:47:04,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-01-06 16:47:04,520 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:47:04,520 INFO L422 BasicCegarLoop]: trace histogram [33, 1, 1, 1, 1, 1, 1] [2021-01-06 16:47:04,726 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-01-06 16:47:04,728 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:47:04,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:47:04,728 INFO L82 PathProgramCache]: Analyzing trace with hash 2033019024, now seen corresponding path program 33 times [2021-01-06 16:47:04,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:47:04,729 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097203837] [2021-01-06 16:47:04,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:47:04,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:47:05,689 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:47:05,689 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097203837] [2021-01-06 16:47:05,689 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1008366072] [2021-01-06 16:47:05,689 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:47:06,510 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2021-01-06 16:47:06,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:47:06,513 WARN L261 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 70 conjunts are in the unsatisfiable core [2021-01-06 16:47:06,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:47:06,679 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:47:06,680 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:47:06,680 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2021-01-06 16:47:06,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263580210] [2021-01-06 16:47:06,680 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-01-06 16:47:06,680 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:47:06,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-01-06 16:47:06,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1227, Unknown=0, NotChecked=0, Total=1332 [2021-01-06 16:47:06,681 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand 37 states. [2021-01-06 16:47:07,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:47:07,596 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2021-01-06 16:47:07,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-01-06 16:47:07,596 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 39 [2021-01-06 16:47:07,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:47:07,597 INFO L225 Difference]: With dead ends: 45 [2021-01-06 16:47:07,597 INFO L226 Difference]: Without dead ends: 41 [2021-01-06 16:47:07,598 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=105, Invalid=1227, Unknown=0, NotChecked=0, Total=1332 [2021-01-06 16:47:07,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-01-06 16:47:07,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2021-01-06 16:47:07,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2021-01-06 16:47:07,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2021-01-06 16:47:07,601 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 39 [2021-01-06 16:47:07,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:47:07,601 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2021-01-06 16:47:07,602 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2021-01-06 16:47:07,602 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2021-01-06 16:47:07,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-01-06 16:47:07,602 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:47:07,602 INFO L422 BasicCegarLoop]: trace histogram [34, 1, 1, 1, 1, 1, 1] [2021-01-06 16:47:07,805 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:47:07,806 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:47:07,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:47:07,806 INFO L82 PathProgramCache]: Analyzing trace with hash -1399254325, now seen corresponding path program 34 times [2021-01-06 16:47:07,807 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:47:07,807 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356200331] [2021-01-06 16:47:07,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:47:07,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:47:08,957 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:47:08,958 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356200331] [2021-01-06 16:47:08,958 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1916172353] [2021-01-06 16:47:08,958 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:47:09,007 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 16:47:09,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:47:09,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 71 conjunts are in the unsatisfiable core [2021-01-06 16:47:09,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:47:09,124 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:47:09,124 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:47:09,124 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2021-01-06 16:47:09,124 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917154691] [2021-01-06 16:47:09,125 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-01-06 16:47:09,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:47:09,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-01-06 16:47:09,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1298, Unknown=0, NotChecked=0, Total=1406 [2021-01-06 16:47:09,126 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 38 states. [2021-01-06 16:47:10,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:47:10,094 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2021-01-06 16:47:10,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-01-06 16:47:10,094 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 40 [2021-01-06 16:47:10,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:47:10,095 INFO L225 Difference]: With dead ends: 46 [2021-01-06 16:47:10,095 INFO L226 Difference]: Without dead ends: 42 [2021-01-06 16:47:10,096 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 40 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 16:47:10,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-01-06 16:47:10,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2021-01-06 16:47:10,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2021-01-06 16:47:10,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2021-01-06 16:47:10,099 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 40 [2021-01-06 16:47:10,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:47:10,100 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2021-01-06 16:47:10,100 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2021-01-06 16:47:10,100 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2021-01-06 16:47:10,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-01-06 16:47:10,100 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:47:10,100 INFO L422 BasicCegarLoop]: trace histogram [35, 1, 1, 1, 1, 1, 1] [2021-01-06 16:47:10,300 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-01-06 16:47:10,301 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:47:10,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:47:10,302 INFO L82 PathProgramCache]: Analyzing trace with hash -425545744, now seen corresponding path program 35 times [2021-01-06 16:47:10,302 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:47:10,302 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727772545] [2021-01-06 16:47:10,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:47:10,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:47:11,383 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:47:11,383 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727772545] [2021-01-06 16:47:11,383 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2089995039] [2021-01-06 16:47:11,383 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 16:47:24,998 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2021-01-06 16:47:24,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:47:25,004 WARN L261 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 108 conjunts are in the unsatisfiable core [2021-01-06 16:47:25,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:47:26,317 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:47:26,317 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:47:26,317 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 39 [2021-01-06 16:47:26,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501660680] [2021-01-06 16:47:26,318 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-01-06 16:47:26,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:47:26,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-01-06 16:47:26,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1371, Unknown=0, NotChecked=0, Total=1482 [2021-01-06 16:47:26,319 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand 39 states. [2021-01-06 16:47:27,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:47:27,255 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2021-01-06 16:47:27,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-01-06 16:47:27,255 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 41 [2021-01-06 16:47:27,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:47:27,256 INFO L225 Difference]: With dead ends: 47 [2021-01-06 16:47:27,256 INFO L226 Difference]: Without dead ends: 43 [2021-01-06 16:47:27,257 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 8 SyntacticMatches, 34 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=111, Invalid=1371, Unknown=0, NotChecked=0, Total=1482 [2021-01-06 16:47:27,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-01-06 16:47:27,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2021-01-06 16:47:27,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2021-01-06 16:47:27,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2021-01-06 16:47:27,260 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 41 [2021-01-06 16:47:27,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:47:27,260 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2021-01-06 16:47:27,260 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2021-01-06 16:47:27,260 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2021-01-06 16:47:27,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-01-06 16:47:27,261 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:47:27,261 INFO L422 BasicCegarLoop]: trace histogram [36, 1, 1, 1, 1, 1, 1] [2021-01-06 16:47:27,461 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:47:27,462 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:47:27,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:47:27,462 INFO L82 PathProgramCache]: Analyzing trace with hash -305350805, now seen corresponding path program 36 times [2021-01-06 16:47:27,463 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:47:27,463 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691307016] [2021-01-06 16:47:27,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:47:27,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:47:28,584 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:47:28,584 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691307016] [2021-01-06 16:47:28,584 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [423580394] [2021-01-06 16:47:28,584 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:47:32,553 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2021-01-06 16:47:32,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:47:32,561 WARN L261 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 83 conjunts are in the unsatisfiable core [2021-01-06 16:47:32,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:47:33,072 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:47:33,073 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:47:33,073 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 40 [2021-01-06 16:47:33,073 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98513757] [2021-01-06 16:47:33,074 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-01-06 16:47:33,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:47:33,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-01-06 16:47:33,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=1446, Unknown=0, NotChecked=0, Total=1560 [2021-01-06 16:47:33,075 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 40 states. [2021-01-06 16:47:34,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:47:34,127 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2021-01-06 16:47:34,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-01-06 16:47:34,128 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 42 [2021-01-06 16:47:34,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:47:34,129 INFO L225 Difference]: With dead ends: 48 [2021-01-06 16:47:34,129 INFO L226 Difference]: Without dead ends: 44 [2021-01-06 16:47:34,130 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 35 SyntacticMatches, 8 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=114, Invalid=1446, Unknown=0, NotChecked=0, Total=1560 [2021-01-06 16:47:34,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-01-06 16:47:34,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2021-01-06 16:47:34,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2021-01-06 16:47:34,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2021-01-06 16:47:34,133 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 42 [2021-01-06 16:47:34,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:47:34,133 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2021-01-06 16:47:34,133 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2021-01-06 16:47:34,133 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2021-01-06 16:47:34,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-01-06 16:47:34,133 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:47:34,133 INFO L422 BasicCegarLoop]: trace histogram [37, 1, 1, 1, 1, 1, 1] [2021-01-06 16:47:34,334 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-01-06 16:47:34,334 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:47:34,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:47:34,335 INFO L82 PathProgramCache]: Analyzing trace with hash -874274992, now seen corresponding path program 37 times [2021-01-06 16:47:34,335 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:47:34,336 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084434007] [2021-01-06 16:47:34,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:47:34,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:47:35,600 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:47:35,601 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084434007] [2021-01-06 16:47:35,601 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [54053978] [2021-01-06 16:47:35,601 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:47:35,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:47:35,656 WARN L261 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 77 conjunts are in the unsatisfiable core [2021-01-06 16:47:35,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:47:35,770 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:47:35,770 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:47:35,770 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 41 [2021-01-06 16:47:35,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508004268] [2021-01-06 16:47:35,771 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-01-06 16:47:35,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:47:35,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-01-06 16:47:35,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1523, Unknown=0, NotChecked=0, Total=1640 [2021-01-06 16:47:35,772 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand 41 states. [2021-01-06 16:47:36,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:47:36,876 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2021-01-06 16:47:36,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-01-06 16:47:36,877 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 43 [2021-01-06 16:47:36,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:47:36,877 INFO L225 Difference]: With dead ends: 49 [2021-01-06 16:47:36,877 INFO L226 Difference]: Without dead ends: 45 [2021-01-06 16:47:36,878 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=117, Invalid=1523, Unknown=0, NotChecked=0, Total=1640 [2021-01-06 16:47:36,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-01-06 16:47:36,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2021-01-06 16:47:36,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2021-01-06 16:47:36,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2021-01-06 16:47:36,881 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 43 [2021-01-06 16:47:36,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:47:36,881 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2021-01-06 16:47:36,881 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2021-01-06 16:47:36,881 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2021-01-06 16:47:36,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-01-06 16:47:36,881 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:47:36,882 INFO L422 BasicCegarLoop]: trace histogram [38, 1, 1, 1, 1, 1, 1] [2021-01-06 16:47:37,082 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-01-06 16:47:37,082 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:47:37,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:47:37,083 INFO L82 PathProgramCache]: Analyzing trace with hash -1331055605, now seen corresponding path program 38 times [2021-01-06 16:47:37,083 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:47:37,083 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551108965] [2021-01-06 16:47:37,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:47:37,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:47:38,283 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:47:38,284 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551108965] [2021-01-06 16:47:38,284 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1725804181] [2021-01-06 16:47:38,284 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 16:47:38,343 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:47:38,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:47:38,345 WARN L261 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 79 conjunts are in the unsatisfiable core [2021-01-06 16:47:38,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:47:38,455 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:47:38,455 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:47:38,456 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 42 [2021-01-06 16:47:38,456 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178198530] [2021-01-06 16:47:38,456 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-01-06 16:47:38,456 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:47:38,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-01-06 16:47:38,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1602, Unknown=0, NotChecked=0, Total=1722 [2021-01-06 16:47:38,457 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand 42 states. [2021-01-06 16:47:39,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:47:39,561 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2021-01-06 16:47:39,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-01-06 16:47:39,561 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 44 [2021-01-06 16:47:39,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:47:39,562 INFO L225 Difference]: With dead ends: 50 [2021-01-06 16:47:39,562 INFO L226 Difference]: Without dead ends: 46 [2021-01-06 16:47:39,563 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=120, Invalid=1602, Unknown=0, NotChecked=0, Total=1722 [2021-01-06 16:47:39,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-01-06 16:47:39,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2021-01-06 16:47:39,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2021-01-06 16:47:39,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions. [2021-01-06 16:47:39,565 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 44 [2021-01-06 16:47:39,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:47:39,565 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions. [2021-01-06 16:47:39,565 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2021-01-06 16:47:39,565 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions. [2021-01-06 16:47:39,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-01-06 16:47:39,565 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:47:39,565 INFO L422 BasicCegarLoop]: trace histogram [39, 1, 1, 1, 1, 1, 1] [2021-01-06 16:47:39,767 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-01-06 16:47:39,768 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:47:39,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:47:39,768 INFO L82 PathProgramCache]: Analyzing trace with hash 1688614576, now seen corresponding path program 39 times [2021-01-06 16:47:39,768 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:47:39,769 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93495077] [2021-01-06 16:47:39,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:47:39,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:47:41,239 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:47:41,239 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93495077] [2021-01-06 16:47:41,239 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [211702335] [2021-01-06 16:47:41,240 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:47:42,106 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2021-01-06 16:47:42,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:47:42,110 WARN L261 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 95 conjunts are in the unsatisfiable core [2021-01-06 16:47:42,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:47:42,706 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:47:42,706 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:47:42,706 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 43 [2021-01-06 16:47:42,706 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914986715] [2021-01-06 16:47:42,707 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-01-06 16:47:42,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:47:42,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-01-06 16:47:42,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=1683, Unknown=0, NotChecked=0, Total=1806 [2021-01-06 16:47:42,708 INFO L87 Difference]: Start difference. First operand 46 states and 46 transitions. Second operand 43 states. [2021-01-06 16:47:43,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:47:43,966 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2021-01-06 16:47:43,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-01-06 16:47:43,967 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 45 [2021-01-06 16:47:43,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:47:43,968 INFO L225 Difference]: With dead ends: 51 [2021-01-06 16:47:43,968 INFO L226 Difference]: Without dead ends: 47 [2021-01-06 16:47:43,969 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 37 SyntacticMatches, 9 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=123, Invalid=1683, Unknown=0, NotChecked=0, Total=1806 [2021-01-06 16:47:43,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-01-06 16:47:43,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2021-01-06 16:47:43,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2021-01-06 16:47:43,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2021-01-06 16:47:43,971 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 45 [2021-01-06 16:47:43,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:47:43,971 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2021-01-06 16:47:43,971 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2021-01-06 16:47:43,972 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2021-01-06 16:47:43,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-01-06 16:47:43,972 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:47:43,972 INFO L422 BasicCegarLoop]: trace histogram [40, 1, 1, 1, 1, 1, 1] [2021-01-06 16:47:44,175 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-01-06 16:47:44,176 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:47:44,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:47:44,177 INFO L82 PathProgramCache]: Analyzing trace with hash 809109675, now seen corresponding path program 40 times [2021-01-06 16:47:44,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:47:44,177 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791759372] [2021-01-06 16:47:44,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:47:44,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:47:45,670 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:47:45,671 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791759372] [2021-01-06 16:47:45,671 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1424787855] [2021-01-06 16:47:45,671 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:47:45,726 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 16:47:45,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:47:45,728 WARN L261 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 83 conjunts are in the unsatisfiable core [2021-01-06 16:47:45,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:47:45,864 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:47:45,865 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:47:45,865 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 44 [2021-01-06 16:47:45,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955729947] [2021-01-06 16:47:45,865 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2021-01-06 16:47:45,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:47:45,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-01-06 16:47:45,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=1766, Unknown=0, NotChecked=0, Total=1892 [2021-01-06 16:47:45,866 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 44 states. [2021-01-06 16:47:47,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:47:47,084 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2021-01-06 16:47:47,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-01-06 16:47:47,085 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 46 [2021-01-06 16:47:47,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:47:47,087 INFO L225 Difference]: With dead ends: 52 [2021-01-06 16:47:47,087 INFO L226 Difference]: Without dead ends: 48 [2021-01-06 16:47:47,088 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=126, Invalid=1766, Unknown=0, NotChecked=0, Total=1892 [2021-01-06 16:47:47,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-01-06 16:47:47,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2021-01-06 16:47:47,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2021-01-06 16:47:47,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2021-01-06 16:47:47,091 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 46 [2021-01-06 16:47:47,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:47:47,091 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2021-01-06 16:47:47,091 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2021-01-06 16:47:47,091 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2021-01-06 16:47:47,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-01-06 16:47:47,091 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:47:47,091 INFO L422 BasicCegarLoop]: trace histogram [41, 1, 1, 1, 1, 1, 1] [2021-01-06 16:47:47,292 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:47:47,292 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:47:47,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:47:47,293 INFO L82 PathProgramCache]: Analyzing trace with hash -685738480, now seen corresponding path program 41 times [2021-01-06 16:47:47,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:47:47,293 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320748185] [2021-01-06 16:47:47,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:47:47,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:47:48,885 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:47:48,885 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320748185] [2021-01-06 16:47:48,885 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [349787989] [2021-01-06 16:47:48,885 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true