/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-invgen/half_2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 06:54:51,885 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 06:54:51,888 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 06:54:51,923 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-23 06:54:51,924 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-23 06:54:51,925 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-23 06:54:51,927 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-23 06:54:51,930 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-23 06:54:51,932 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-23 06:54:51,933 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-23 06:54:51,934 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-23 06:54:51,936 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-23 06:54:51,936 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 06:54:51,938 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 06:54:51,939 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 06:54:51,940 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 06:54:51,954 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 06:54:51,956 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 06:54:51,964 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 06:54:51,970 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 06:54:51,975 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 06:54:51,976 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 06:54:51,978 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 06:54:51,979 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 06:54:51,986 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-23 06:54:51,998 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-23 06:54:51,999 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-23 06:54:52,000 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-23 06:54:52,002 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-23 06:54:52,003 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-23 06:54:52,004 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-23 06:54:52,004 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-23 06:54:52,005 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-23 06:54:52,005 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 06:54:52,006 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 06:54:52,014 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 06:54:52,015 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-23 06:54:52,063 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 06:54:52,064 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 06:54:52,068 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 06:54:52,069 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 06:54:52,069 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 06:54:52,069 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 06:54:52,069 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 06:54:52,069 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 06:54:52,070 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-23 06:54:52,070 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 06:54:52,071 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-23 06:54:52,071 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-23 06:54:52,071 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 06:54:52,072 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-23 06:54:52,072 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 06:54:52,072 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 06:54:52,073 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 06:54:52,073 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 06:54:52,073 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 06:54:52,073 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 06:54:52,074 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-23 06:54:52,074 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 06:54:52,074 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 06:54:52,074 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-23 06:54:52,074 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 06:54:52,075 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 06:54:52,490 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 06:54:52,517 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 06:54:52,520 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 06:54:52,521 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 06:54:52,523 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 06:54:52,524 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-invgen/half_2.i [2020-12-23 06:54:52,601 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/cd469c5e4/0e8ced6fc9754c618e734b5ba20329b3/FLAGfc05b0d94 [2020-12-23 06:54:53,286 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 06:54:53,287 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/loop-invgen/half_2.i [2020-12-23 06:54:53,297 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/cd469c5e4/0e8ced6fc9754c618e734b5ba20329b3/FLAGfc05b0d94 [2020-12-23 06:54:53,632 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/cd469c5e4/0e8ced6fc9754c618e734b5ba20329b3 [2020-12-23 06:54:53,635 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 06:54:53,637 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 06:54:53,639 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 06:54:53,639 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 06:54:53,643 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 06:54:53,644 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 06:54:53" (1/1) ... [2020-12-23 06:54:53,645 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@179703b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:54:53, skipping insertion in model container [2020-12-23 06:54:53,645 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 06:54:53" (1/1) ... [2020-12-23 06:54:53,654 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 06:54:53,670 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-23 06:54:53,834 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-invgen/half_2.i[893,906] left hand side expression in assignment: lhs: VariableLHS[~n~0,] left hand side expression in assignment: lhs: VariableLHS[~k~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] [2020-12-23 06:54:53,855 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 06:54:53,866 INFO L203 MainTranslator]: Completed pre-run [2020-12-23 06:54:53,881 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-invgen/half_2.i[893,906] left hand side expression in assignment: lhs: VariableLHS[~n~0,] left hand side expression in assignment: lhs: VariableLHS[~k~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] [2020-12-23 06:54:53,886 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 06:54:53,903 INFO L208 MainTranslator]: Completed translation [2020-12-23 06:54:53,903 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:54:53 WrapperNode [2020-12-23 06:54:53,903 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 06:54:53,905 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 06:54:53,905 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 06:54:53,905 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 06:54:53,914 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:54:53" (1/1) ... [2020-12-23 06:54:53,922 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:54:53" (1/1) ... [2020-12-23 06:54:53,942 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 06:54:53,943 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 06:54:53,943 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 06:54:53,944 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 06:54:53,953 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:54:53" (1/1) ... [2020-12-23 06:54:53,953 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:54:53" (1/1) ... [2020-12-23 06:54:53,955 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:54:53" (1/1) ... [2020-12-23 06:54:53,955 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:54:53" (1/1) ... [2020-12-23 06:54:53,959 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:54:53" (1/1) ... [2020-12-23 06:54:53,963 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:54:53" (1/1) ... [2020-12-23 06:54:53,965 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:54:53" (1/1) ... [2020-12-23 06:54:53,966 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 06:54:53,968 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 06:54:53,968 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 06:54:53,968 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 06:54:53,969 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:54:53" (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 [2020-12-23 06:54:54,068 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-23 06:54:54,069 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 06:54:54,069 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 06:54:54,069 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 06:54:54,338 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 06:54:54,338 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2020-12-23 06:54:54,340 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 06:54:54 BoogieIcfgContainer [2020-12-23 06:54:54,376 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 06:54:54,383 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 06:54:54,383 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 06:54:54,391 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 06:54:54,392 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 06:54:53" (1/3) ... [2020-12-23 06:54:54,393 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@480f2f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 06:54:54, skipping insertion in model container [2020-12-23 06:54:54,393 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:54:53" (2/3) ... [2020-12-23 06:54:54,394 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@480f2f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 06:54:54, skipping insertion in model container [2020-12-23 06:54:54,397 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 06:54:54" (3/3) ... [2020-12-23 06:54:54,402 INFO L111 eAbstractionObserver]: Analyzing ICFG half_2.i [2020-12-23 06:54:54,418 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 06:54:54,430 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-23 06:54:54,478 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-23 06:54:54,521 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 06:54:54,521 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-23 06:54:54,522 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 06:54:54,522 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 06:54:54,522 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 06:54:54,522 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 06:54:54,522 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 06:54:54,522 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 06:54:54,538 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states. [2020-12-23 06:54:54,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-23 06:54:54,544 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:54:54,545 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:54:54,546 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:54:54,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:54:54,552 INFO L82 PathProgramCache]: Analyzing trace with hash 185205049, now seen corresponding path program 1 times [2020-12-23 06:54:54,563 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:54:54,564 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343611145] [2020-12-23 06:54:54,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:54:54,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:54:54,716 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:54:54,717 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343611145] [2020-12-23 06:54:54,718 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 06:54:54,718 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-23 06:54:54,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849546194] [2020-12-23 06:54:54,724 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-23 06:54:54,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:54:54,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-23 06:54:54,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-23 06:54:54,743 INFO L87 Difference]: Start difference. First operand 14 states. Second operand 2 states. [2020-12-23 06:54:54,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:54:54,760 INFO L93 Difference]: Finished difference Result 24 states and 31 transitions. [2020-12-23 06:54:54,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-23 06:54:54,761 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 8 [2020-12-23 06:54:54,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:54:54,771 INFO L225 Difference]: With dead ends: 24 [2020-12-23 06:54:54,771 INFO L226 Difference]: Without dead ends: 10 [2020-12-23 06:54:54,774 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-23 06:54:54,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2020-12-23 06:54:54,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2020-12-23 06:54:54,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2020-12-23 06:54:54,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2020-12-23 06:54:54,810 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 8 [2020-12-23 06:54:54,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:54:54,810 INFO L481 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2020-12-23 06:54:54,810 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-23 06:54:54,811 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2020-12-23 06:54:54,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-23 06:54:54,811 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:54:54,811 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:54:54,812 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-23 06:54:54,812 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:54:54,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:54:54,813 INFO L82 PathProgramCache]: Analyzing trace with hash 181510965, now seen corresponding path program 1 times [2020-12-23 06:54:54,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:54:54,814 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120995631] [2020-12-23 06:54:54,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:54:54,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:54:54,949 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:54:54,950 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120995631] [2020-12-23 06:54:54,950 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 06:54:54,950 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-23 06:54:54,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005576982] [2020-12-23 06:54:54,952 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 06:54:54,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:54:54,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 06:54:54,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-23 06:54:54,954 INFO L87 Difference]: Start difference. First operand 10 states and 11 transitions. Second operand 5 states. [2020-12-23 06:54:55,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:54:55,092 INFO L93 Difference]: Finished difference Result 18 states and 20 transitions. [2020-12-23 06:54:55,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 06:54:55,094 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-12-23 06:54:55,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:54:55,095 INFO L225 Difference]: With dead ends: 18 [2020-12-23 06:54:55,095 INFO L226 Difference]: Without dead ends: 16 [2020-12-23 06:54:55,097 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-12-23 06:54:55,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-12-23 06:54:55,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 14. [2020-12-23 06:54:55,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-12-23 06:54:55,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2020-12-23 06:54:55,108 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 8 [2020-12-23 06:54:55,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:54:55,109 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2020-12-23 06:54:55,109 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 06:54:55,110 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2020-12-23 06:54:55,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-23 06:54:55,110 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:54:55,110 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:54:55,111 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-23 06:54:55,112 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:54:55,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:54:55,114 INFO L82 PathProgramCache]: Analyzing trace with hash 1383318765, now seen corresponding path program 1 times [2020-12-23 06:54:55,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:54:55,115 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668025934] [2020-12-23 06:54:55,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:54:55,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:54:55,273 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:54:55,273 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668025934] [2020-12-23 06:54:55,274 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [57521036] [2020-12-23 06:54:55,274 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 [2020-12-23 06:54:55,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:54:55,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-23 06:54:55,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:54:55,600 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:54:55,611 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 06:54:55,626 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 06:54:55,650 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:54:55,651 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:54:55,651 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2020-12-23 06:54:55,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032344479] [2020-12-23 06:54:55,652 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-23 06:54:55,652 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:54:55,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-23 06:54:55,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-12-23 06:54:55,654 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand 9 states. [2020-12-23 06:54:55,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:54:55,774 INFO L93 Difference]: Finished difference Result 24 states and 27 transitions. [2020-12-23 06:54:55,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-23 06:54:55,775 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 9 [2020-12-23 06:54:55,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:54:55,776 INFO L225 Difference]: With dead ends: 24 [2020-12-23 06:54:55,776 INFO L226 Difference]: Without dead ends: 22 [2020-12-23 06:54:55,777 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-12-23 06:54:55,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-12-23 06:54:55,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 15. [2020-12-23 06:54:55,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-12-23 06:54:55,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 18 transitions. [2020-12-23 06:54:55,782 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 18 transitions. Word has length 9 [2020-12-23 06:54:55,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:54:55,783 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 18 transitions. [2020-12-23 06:54:55,783 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-23 06:54:55,783 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 18 transitions. [2020-12-23 06:54:55,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-23 06:54:55,784 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:54:55,784 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:54:55,999 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-12-23 06:54:56,000 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:54:56,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:54:56,002 INFO L82 PathProgramCache]: Analyzing trace with hash -15345099, now seen corresponding path program 2 times [2020-12-23 06:54:56,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:54:56,003 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43692965] [2020-12-23 06:54:56,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:54:56,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:54:56,134 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:54:56,135 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43692965] [2020-12-23 06:54:56,135 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1627624172] [2020-12-23 06:54:56,136 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 [2020-12-23 06:54:56,222 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 06:54:56,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:54:56,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-23 06:54:56,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:54:56,344 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:54:56,344 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:54:56,344 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2020-12-23 06:54:56,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090268699] [2020-12-23 06:54:56,347 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-23 06:54:56,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:54:56,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-23 06:54:56,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-12-23 06:54:56,349 INFO L87 Difference]: Start difference. First operand 15 states and 18 transitions. Second operand 9 states. [2020-12-23 06:54:56,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:54:56,583 INFO L93 Difference]: Finished difference Result 26 states and 29 transitions. [2020-12-23 06:54:56,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-23 06:54:56,584 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 10 [2020-12-23 06:54:56,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:54:56,588 INFO L225 Difference]: With dead ends: 26 [2020-12-23 06:54:56,588 INFO L226 Difference]: Without dead ends: 24 [2020-12-23 06:54:56,588 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2020-12-23 06:54:56,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-12-23 06:54:56,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 12. [2020-12-23 06:54:56,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-12-23 06:54:56,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2020-12-23 06:54:56,595 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 10 [2020-12-23 06:54:56,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:54:56,595 INFO L481 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2020-12-23 06:54:56,595 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-23 06:54:56,595 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2020-12-23 06:54:56,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-23 06:54:56,596 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:54:56,598 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:54:56,814 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:54:56,815 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:54:56,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:54:56,816 INFO L82 PathProgramCache]: Analyzing trace with hash 34157897, now seen corresponding path program 1 times [2020-12-23 06:54:56,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:54:56,818 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68310787] [2020-12-23 06:54:56,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:54:56,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:54:57,051 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:54:57,052 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68310787] [2020-12-23 06:54:57,052 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2068388915] [2020-12-23 06:54:57,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:54:57,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:54:57,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-23 06:54:57,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:54:57,229 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:54:57,229 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-23 06:54:57,229 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10 [2020-12-23 06:54:57,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298171886] [2020-12-23 06:54:57,230 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 06:54:57,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:54:57,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 06:54:57,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-12-23 06:54:57,234 INFO L87 Difference]: Start difference. First operand 12 states and 13 transitions. Second operand 5 states. [2020-12-23 06:54:57,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:54:57,322 INFO L93 Difference]: Finished difference Result 21 states and 23 transitions. [2020-12-23 06:54:57,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 06:54:57,322 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2020-12-23 06:54:57,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:54:57,323 INFO L225 Difference]: With dead ends: 21 [2020-12-23 06:54:57,323 INFO L226 Difference]: Without dead ends: 13 [2020-12-23 06:54:57,324 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-12-23 06:54:57,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2020-12-23 06:54:57,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2020-12-23 06:54:57,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-12-23 06:54:57,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2020-12-23 06:54:57,328 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 11 [2020-12-23 06:54:57,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:54:57,328 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2020-12-23 06:54:57,328 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 06:54:57,328 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2020-12-23 06:54:57,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-23 06:54:57,329 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:54:57,329 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:54:57,542 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:54:57,543 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:54:57,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:54:57,544 INFO L82 PathProgramCache]: Analyzing trace with hash 242948241, now seen corresponding path program 1 times [2020-12-23 06:54:57,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:54:57,545 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698431384] [2020-12-23 06:54:57,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:54:57,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:54:57,699 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:54:57,699 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698431384] [2020-12-23 06:54:57,700 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [677519486] [2020-12-23 06:54:57,704 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 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 [2020-12-23 06:54:57,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:54:57,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-23 06:54:57,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:54:57,840 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:54:57,841 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:54:57,841 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2020-12-23 06:54:57,841 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864033793] [2020-12-23 06:54:57,841 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-23 06:54:57,842 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:54:57,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-23 06:54:57,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2020-12-23 06:54:57,843 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand 12 states. [2020-12-23 06:54:57,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:54:57,958 INFO L93 Difference]: Finished difference Result 24 states and 26 transitions. [2020-12-23 06:54:57,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-23 06:54:57,958 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 12 [2020-12-23 06:54:57,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:54:57,959 INFO L225 Difference]: With dead ends: 24 [2020-12-23 06:54:57,959 INFO L226 Difference]: Without dead ends: 14 [2020-12-23 06:54:57,960 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-12-23 06:54:57,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-12-23 06:54:57,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-12-23 06:54:57,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-12-23 06:54:57,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2020-12-23 06:54:57,964 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 12 [2020-12-23 06:54:57,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:54:57,965 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2020-12-23 06:54:57,965 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-23 06:54:57,965 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2020-12-23 06:54:57,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-23 06:54:57,966 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:54:57,966 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:54:58,179 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:54:58,180 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:54:58,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:54:58,182 INFO L82 PathProgramCache]: Analyzing trace with hash -1874485687, now seen corresponding path program 2 times [2020-12-23 06:54:58,182 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:54:58,183 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333328734] [2020-12-23 06:54:58,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:54:58,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:54:58,413 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:54:58,413 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333328734] [2020-12-23 06:54:58,414 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1843676289] [2020-12-23 06:54:58,414 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:54:58,461 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 06:54:58,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:54:58,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 06:54:58,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:54:58,577 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:54:58,581 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 06:54:58,584 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 06:54:58,600 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:54:58,600 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:54:58,600 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2020-12-23 06:54:58,601 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281089121] [2020-12-23 06:54:58,601 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-23 06:54:58,601 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:54:58,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-23 06:54:58,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2020-12-23 06:54:58,602 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 13 states. [2020-12-23 06:54:58,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:54:58,780 INFO L93 Difference]: Finished difference Result 27 states and 30 transitions. [2020-12-23 06:54:58,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-23 06:54:58,782 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 13 [2020-12-23 06:54:58,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:54:58,782 INFO L225 Difference]: With dead ends: 27 [2020-12-23 06:54:58,783 INFO L226 Difference]: Without dead ends: 15 [2020-12-23 06:54:58,784 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2020-12-23 06:54:58,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-12-23 06:54:58,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-12-23 06:54:58,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-12-23 06:54:58,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2020-12-23 06:54:58,798 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 13 [2020-12-23 06:54:58,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:54:58,798 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2020-12-23 06:54:58,798 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-23 06:54:58,798 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2020-12-23 06:54:58,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 06:54:58,799 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:54:58,799 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:54:59,013 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-12-23 06:54:59,014 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:54:59,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:54:59,015 INFO L82 PathProgramCache]: Analyzing trace with hash 1204539281, now seen corresponding path program 3 times [2020-12-23 06:54:59,015 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:54:59,016 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052050757] [2020-12-23 06:54:59,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:54:59,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:54:59,126 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:54:59,126 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052050757] [2020-12-23 06:54:59,126 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [19990180] [2020-12-23 06:54:59,127 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 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 [2020-12-23 06:54:59,173 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-23 06:54:59,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:54:59,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-23 06:54:59,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:54:59,271 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:54:59,271 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:54:59,271 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2020-12-23 06:54:59,271 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054379888] [2020-12-23 06:54:59,272 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-23 06:54:59,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:54:59,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-23 06:54:59,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2020-12-23 06:54:59,273 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 12 states. [2020-12-23 06:54:59,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:54:59,398 INFO L93 Difference]: Finished difference Result 22 states and 23 transitions. [2020-12-23 06:54:59,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-23 06:54:59,399 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 14 [2020-12-23 06:54:59,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:54:59,399 INFO L225 Difference]: With dead ends: 22 [2020-12-23 06:54:59,400 INFO L226 Difference]: Without dead ends: 20 [2020-12-23 06:54:59,400 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2020-12-23 06:54:59,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-12-23 06:54:59,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 18. [2020-12-23 06:54:59,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-12-23 06:54:59,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-12-23 06:54:59,405 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 14 [2020-12-23 06:54:59,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:54:59,406 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-12-23 06:54:59,406 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-23 06:54:59,406 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-12-23 06:54:59,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-23 06:54:59,407 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:54:59,407 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:54:59,620 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:54:59,621 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:54:59,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:54:59,622 INFO L82 PathProgramCache]: Analyzing trace with hash -17212563, now seen corresponding path program 4 times [2020-12-23 06:54:59,622 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:54:59,623 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668905557] [2020-12-23 06:54:59,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:54:59,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:54:59,905 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:54:59,905 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668905557] [2020-12-23 06:54:59,906 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1947827282] [2020-12-23 06:54:59,906 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 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 [2020-12-23 06:54:59,952 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 06:54:59,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:54:59,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-23 06:54:59,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:55:00,103 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:55:00,107 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 06:55:00,109 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 06:55:00,127 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:55:00,127 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:55:00,128 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 16 [2020-12-23 06:55:00,128 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366970834] [2020-12-23 06:55:00,128 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-23 06:55:00,128 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:55:00,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-23 06:55:00,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2020-12-23 06:55:00,130 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 16 states. [2020-12-23 06:55:00,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:55:00,347 INFO L93 Difference]: Finished difference Result 34 states and 37 transitions. [2020-12-23 06:55:00,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-23 06:55:00,348 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 17 [2020-12-23 06:55:00,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:55:00,349 INFO L225 Difference]: With dead ends: 34 [2020-12-23 06:55:00,349 INFO L226 Difference]: Without dead ends: 19 [2020-12-23 06:55:00,350 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2020-12-23 06:55:00,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-12-23 06:55:00,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-12-23 06:55:00,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-12-23 06:55:00,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2020-12-23 06:55:00,354 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 17 [2020-12-23 06:55:00,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:55:00,355 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2020-12-23 06:55:00,355 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-23 06:55:00,355 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2020-12-23 06:55:00,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-23 06:55:00,355 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:55:00,356 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:55:00,569 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:55:00,570 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:55:00,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:55:00,571 INFO L82 PathProgramCache]: Analyzing trace with hash 972400821, now seen corresponding path program 5 times [2020-12-23 06:55:00,571 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:55:00,572 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268047838] [2020-12-23 06:55:00,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:55:00,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:55:00,668 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:55:00,668 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268047838] [2020-12-23 06:55:00,668 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [687308573] [2020-12-23 06:55:00,669 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:55:00,722 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-12-23 06:55:00,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:55:00,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-23 06:55:00,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:55:00,838 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:55:00,838 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:55:00,839 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2020-12-23 06:55:00,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855258142] [2020-12-23 06:55:00,839 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-23 06:55:00,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:55:00,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-23 06:55:00,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2020-12-23 06:55:00,840 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand 15 states. [2020-12-23 06:55:01,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:55:01,016 INFO L93 Difference]: Finished difference Result 26 states and 27 transitions. [2020-12-23 06:55:01,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-23 06:55:01,016 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-12-23 06:55:01,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:55:01,017 INFO L225 Difference]: With dead ends: 26 [2020-12-23 06:55:01,017 INFO L226 Difference]: Without dead ends: 24 [2020-12-23 06:55:01,020 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2020-12-23 06:55:01,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-12-23 06:55:01,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 22. [2020-12-23 06:55:01,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-12-23 06:55:01,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2020-12-23 06:55:01,037 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 18 [2020-12-23 06:55:01,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:55:01,037 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2020-12-23 06:55:01,037 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-23 06:55:01,037 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2020-12-23 06:55:01,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-12-23 06:55:01,038 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:55:01,038 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:55:01,251 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-12-23 06:55:01,252 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:55:01,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:55:01,253 INFO L82 PathProgramCache]: Analyzing trace with hash -756727863, now seen corresponding path program 6 times [2020-12-23 06:55:01,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:55:01,253 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571102547] [2020-12-23 06:55:01,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:55:01,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:55:01,591 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:55:01,591 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571102547] [2020-12-23 06:55:01,592 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [757999625] [2020-12-23 06:55:01,592 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:55:01,641 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-12-23 06:55:01,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:55:01,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-23 06:55:01,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:55:01,954 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:55:01,958 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 06:55:01,961 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 06:55:01,984 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:55:01,984 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:55:01,984 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 23 [2020-12-23 06:55:01,985 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741974143] [2020-12-23 06:55:01,985 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-23 06:55:01,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:55:01,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-23 06:55:01,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2020-12-23 06:55:01,986 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand 23 states. [2020-12-23 06:55:02,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:55:02,400 INFO L93 Difference]: Finished difference Result 41 states and 44 transitions. [2020-12-23 06:55:02,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-23 06:55:02,401 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 21 [2020-12-23 06:55:02,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:55:02,401 INFO L225 Difference]: With dead ends: 41 [2020-12-23 06:55:02,402 INFO L226 Difference]: Without dead ends: 23 [2020-12-23 06:55:02,403 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=135, Invalid=921, Unknown=0, NotChecked=0, Total=1056 [2020-12-23 06:55:02,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-12-23 06:55:02,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-12-23 06:55:02,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-12-23 06:55:02,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2020-12-23 06:55:02,409 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 21 [2020-12-23 06:55:02,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:55:02,410 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2020-12-23 06:55:02,410 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-23 06:55:02,410 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2020-12-23 06:55:02,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-12-23 06:55:02,411 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:55:02,411 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:55:02,622 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:55:02,623 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:55:02,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:55:02,624 INFO L82 PathProgramCache]: Analyzing trace with hash 1894361361, now seen corresponding path program 7 times [2020-12-23 06:55:02,624 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:55:02,624 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265170820] [2020-12-23 06:55:02,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:55:02,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:55:02,776 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:55:02,777 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265170820] [2020-12-23 06:55:02,778 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [403062913] [2020-12-23 06:55:02,778 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:55:02,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:55:02,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-23 06:55:02,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:55:03,015 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:55:03,015 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:55:03,016 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2020-12-23 06:55:03,016 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53123033] [2020-12-23 06:55:03,018 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-23 06:55:03,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:55:03,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-23 06:55:03,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2020-12-23 06:55:03,020 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 18 states. [2020-12-23 06:55:03,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:55:03,239 INFO L93 Difference]: Finished difference Result 30 states and 31 transitions. [2020-12-23 06:55:03,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-23 06:55:03,240 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-12-23 06:55:03,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:55:03,241 INFO L225 Difference]: With dead ends: 30 [2020-12-23 06:55:03,241 INFO L226 Difference]: Without dead ends: 28 [2020-12-23 06:55:03,242 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=134, Invalid=516, Unknown=0, NotChecked=0, Total=650 [2020-12-23 06:55:03,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-12-23 06:55:03,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2020-12-23 06:55:03,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-12-23 06:55:03,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2020-12-23 06:55:03,248 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 22 [2020-12-23 06:55:03,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:55:03,249 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2020-12-23 06:55:03,249 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-23 06:55:03,249 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2020-12-23 06:55:03,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-12-23 06:55:03,249 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:55:03,250 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:55:03,462 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:55:03,466 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:55:03,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:55:03,467 INFO L82 PathProgramCache]: Analyzing trace with hash -946138643, now seen corresponding path program 8 times [2020-12-23 06:55:03,467 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:55:03,467 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864521000] [2020-12-23 06:55:03,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:55:03,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:55:03,935 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 12 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:55:03,935 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864521000] [2020-12-23 06:55:03,936 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [478653472] [2020-12-23 06:55:03,936 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:55:03,996 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 06:55:03,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:55:03,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 25 conjunts are in the unsatisfiable core [2020-12-23 06:55:03,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:55:04,223 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:55:04,226 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 06:55:04,229 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 06:55:04,259 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:55:04,260 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:55:04,260 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 22 [2020-12-23 06:55:04,260 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704913587] [2020-12-23 06:55:04,260 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-23 06:55:04,261 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:55:04,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-23 06:55:04,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2020-12-23 06:55:04,262 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand 22 states. [2020-12-23 06:55:04,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:55:04,603 INFO L93 Difference]: Finished difference Result 48 states and 51 transitions. [2020-12-23 06:55:04,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-23 06:55:04,604 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-12-23 06:55:04,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:55:04,607 INFO L225 Difference]: With dead ends: 48 [2020-12-23 06:55:04,607 INFO L226 Difference]: Without dead ends: 27 [2020-12-23 06:55:04,608 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=110, Invalid=646, Unknown=0, NotChecked=0, Total=756 [2020-12-23 06:55:04,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-12-23 06:55:04,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-12-23 06:55:04,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-12-23 06:55:04,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-12-23 06:55:04,614 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 25 [2020-12-23 06:55:04,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:55:04,615 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-12-23 06:55:04,615 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-23 06:55:04,615 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-12-23 06:55:04,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-23 06:55:04,615 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:55:04,616 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:55:04,830 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-12-23 06:55:04,831 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:55:04,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:55:04,832 INFO L82 PathProgramCache]: Analyzing trace with hash -1892051147, now seen corresponding path program 9 times [2020-12-23 06:55:04,832 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:55:04,832 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445357144] [2020-12-23 06:55:04,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:55:04,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:55:05,036 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 10 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:55:05,036 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445357144] [2020-12-23 06:55:05,036 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [763022034] [2020-12-23 06:55:05,037 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 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 [2020-12-23 06:55:05,103 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-12-23 06:55:05,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:55:05,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-23 06:55:05,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:55:05,343 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:55:05,343 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:55:05,343 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 21 [2020-12-23 06:55:05,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158544915] [2020-12-23 06:55:05,344 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-23 06:55:05,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:55:05,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-23 06:55:05,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2020-12-23 06:55:05,345 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 21 states. [2020-12-23 06:55:05,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:55:05,627 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2020-12-23 06:55:05,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-23 06:55:05,628 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 26 [2020-12-23 06:55:05,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:55:05,630 INFO L225 Difference]: With dead ends: 34 [2020-12-23 06:55:05,630 INFO L226 Difference]: Without dead ends: 32 [2020-12-23 06:55:05,631 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=185, Invalid=745, Unknown=0, NotChecked=0, Total=930 [2020-12-23 06:55:05,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-12-23 06:55:05,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2020-12-23 06:55:05,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-12-23 06:55:05,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2020-12-23 06:55:05,652 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 26 [2020-12-23 06:55:05,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:55:05,654 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2020-12-23 06:55:05,654 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-23 06:55:05,654 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2020-12-23 06:55:05,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-12-23 06:55:05,655 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:55:05,655 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:55:05,859 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-23 06:55:05,860 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:55:05,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:55:05,860 INFO L82 PathProgramCache]: Analyzing trace with hash 1059897673, now seen corresponding path program 10 times [2020-12-23 06:55:05,860 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:55:05,861 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240358347] [2020-12-23 06:55:05,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:55:05,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:55:06,437 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 22 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:55:06,437 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240358347] [2020-12-23 06:55:06,437 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267135428] [2020-12-23 06:55:06,437 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 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 [2020-12-23 06:55:06,482 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 06:55:06,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:55:06,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 29 conjunts are in the unsatisfiable core [2020-12-23 06:55:06,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:55:06,785 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:55:06,788 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 06:55:06,790 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 06:55:06,821 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:55:06,821 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:55:06,822 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 25 [2020-12-23 06:55:06,822 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574343900] [2020-12-23 06:55:06,822 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-12-23 06:55:06,822 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:55:06,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-12-23 06:55:06,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2020-12-23 06:55:06,823 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 25 states. [2020-12-23 06:55:07,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:55:07,350 INFO L93 Difference]: Finished difference Result 55 states and 58 transitions. [2020-12-23 06:55:07,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-23 06:55:07,350 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 29 [2020-12-23 06:55:07,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:55:07,351 INFO L225 Difference]: With dead ends: 55 [2020-12-23 06:55:07,351 INFO L226 Difference]: Without dead ends: 31 [2020-12-23 06:55:07,352 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=136, Invalid=856, Unknown=0, NotChecked=0, Total=992 [2020-12-23 06:55:07,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-12-23 06:55:07,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-12-23 06:55:07,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-12-23 06:55:07,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2020-12-23 06:55:07,358 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 29 [2020-12-23 06:55:07,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:55:07,358 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2020-12-23 06:55:07,358 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-12-23 06:55:07,358 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2020-12-23 06:55:07,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-12-23 06:55:07,359 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:55:07,359 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:55:07,566 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-12-23 06:55:07,567 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:55:07,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:55:07,568 INFO L82 PathProgramCache]: Analyzing trace with hash 1576493713, now seen corresponding path program 11 times [2020-12-23 06:55:07,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:55:07,569 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475687483] [2020-12-23 06:55:07,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:55:07,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:55:07,747 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 15 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:55:07,748 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475687483] [2020-12-23 06:55:07,748 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [419459683] [2020-12-23 06:55:07,748 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 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 [2020-12-23 06:55:07,800 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-12-23 06:55:07,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:55:07,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 24 conjunts are in the unsatisfiable core [2020-12-23 06:55:07,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:55:08,064 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:55:08,064 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:55:08,064 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 24 [2020-12-23 06:55:08,064 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245058585] [2020-12-23 06:55:08,065 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-12-23 06:55:08,065 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:55:08,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-12-23 06:55:08,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2020-12-23 06:55:08,066 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand 24 states. [2020-12-23 06:55:08,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:55:08,456 INFO L93 Difference]: Finished difference Result 38 states and 39 transitions. [2020-12-23 06:55:08,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-23 06:55:08,457 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 30 [2020-12-23 06:55:08,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:55:08,457 INFO L225 Difference]: With dead ends: 38 [2020-12-23 06:55:08,457 INFO L226 Difference]: Without dead ends: 36 [2020-12-23 06:55:08,458 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=244, Invalid=1016, Unknown=0, NotChecked=0, Total=1260 [2020-12-23 06:55:08,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-12-23 06:55:08,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 34. [2020-12-23 06:55:08,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-12-23 06:55:08,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2020-12-23 06:55:08,465 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 30 [2020-12-23 06:55:08,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:55:08,465 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2020-12-23 06:55:08,465 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-12-23 06:55:08,465 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2020-12-23 06:55:08,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-12-23 06:55:08,466 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:55:08,466 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:55:08,680 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:55:08,681 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:55:08,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:55:08,682 INFO L82 PathProgramCache]: Analyzing trace with hash -138352531, now seen corresponding path program 12 times [2020-12-23 06:55:08,682 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:55:08,682 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094655673] [2020-12-23 06:55:08,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:55:08,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:55:09,340 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 35 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:55:09,340 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094655673] [2020-12-23 06:55:09,340 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2099811668] [2020-12-23 06:55:09,341 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 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 [2020-12-23 06:55:09,395 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-12-23 06:55:09,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:55:09,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 27 conjunts are in the unsatisfiable core [2020-12-23 06:55:09,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:55:10,049 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:55:10,057 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 06:55:10,063 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 06:55:10,113 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:55:10,114 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:55:10,114 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 35 [2020-12-23 06:55:10,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167740675] [2020-12-23 06:55:10,116 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-12-23 06:55:10,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:55:10,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-12-23 06:55:10,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=1058, Unknown=0, NotChecked=0, Total=1190 [2020-12-23 06:55:10,118 INFO L87 Difference]: Start difference. First operand 34 states and 35 transitions. Second operand 35 states. [2020-12-23 06:55:11,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:55:11,042 INFO L93 Difference]: Finished difference Result 62 states and 65 transitions. [2020-12-23 06:55:11,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-12-23 06:55:11,043 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 33 [2020-12-23 06:55:11,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:55:11,043 INFO L225 Difference]: With dead ends: 62 [2020-12-23 06:55:11,043 INFO L226 Difference]: Without dead ends: 35 [2020-12-23 06:55:11,045 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 454 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=261, Invalid=2289, Unknown=0, NotChecked=0, Total=2550 [2020-12-23 06:55:11,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-12-23 06:55:11,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2020-12-23 06:55:11,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-12-23 06:55:11,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2020-12-23 06:55:11,053 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 33 [2020-12-23 06:55:11,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:55:11,053 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2020-12-23 06:55:11,053 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-12-23 06:55:11,053 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2020-12-23 06:55:11,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-12-23 06:55:11,054 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:55:11,054 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:55:11,268 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-23 06:55:11,269 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:55:11,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:55:11,270 INFO L82 PathProgramCache]: Analyzing trace with hash -2109102667, now seen corresponding path program 13 times [2020-12-23 06:55:11,270 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:55:11,271 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024162482] [2020-12-23 06:55:11,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:55:11,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:55:11,461 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 21 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:55:11,462 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024162482] [2020-12-23 06:55:11,462 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1639153587] [2020-12-23 06:55:11,462 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 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 [2020-12-23 06:55:11,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:55:11,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 27 conjunts are in the unsatisfiable core [2020-12-23 06:55:11,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:55:11,847 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 93 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:55:11,848 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:55:11,848 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 27 [2020-12-23 06:55:11,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465585826] [2020-12-23 06:55:11,848 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-12-23 06:55:11,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:55:11,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-12-23 06:55:11,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=579, Unknown=0, NotChecked=0, Total=702 [2020-12-23 06:55:11,850 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand 27 states. [2020-12-23 06:55:12,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:55:12,383 INFO L93 Difference]: Finished difference Result 42 states and 43 transitions. [2020-12-23 06:55:12,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-23 06:55:12,383 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 34 [2020-12-23 06:55:12,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:55:12,384 INFO L225 Difference]: With dead ends: 42 [2020-12-23 06:55:12,384 INFO L226 Difference]: Without dead ends: 40 [2020-12-23 06:55:12,385 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=311, Invalid=1329, Unknown=0, NotChecked=0, Total=1640 [2020-12-23 06:55:12,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-12-23 06:55:12,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 38. [2020-12-23 06:55:12,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-12-23 06:55:12,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2020-12-23 06:55:12,393 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 34 [2020-12-23 06:55:12,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:55:12,393 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2020-12-23 06:55:12,393 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-12-23 06:55:12,393 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2020-12-23 06:55:12,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-12-23 06:55:12,394 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:55:12,394 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:55:12,609 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-23 06:55:12,610 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:55:12,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:55:12,611 INFO L82 PathProgramCache]: Analyzing trace with hash -1196154167, now seen corresponding path program 14 times [2020-12-23 06:55:12,611 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:55:12,612 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800030746] [2020-12-23 06:55:12,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:55:12,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:55:13,339 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 51 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:55:13,339 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800030746] [2020-12-23 06:55:13,339 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [298875450] [2020-12-23 06:55:13,339 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:55:13,390 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 06:55:13,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:55:13,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 37 conjunts are in the unsatisfiable core [2020-12-23 06:55:13,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:55:13,853 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:55:13,855 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 06:55:13,858 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 06:55:13,894 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 113 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:55:13,894 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:55:13,894 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 31 [2020-12-23 06:55:13,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723271352] [2020-12-23 06:55:13,895 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-12-23 06:55:13,895 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:55:13,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-12-23 06:55:13,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=816, Unknown=0, NotChecked=0, Total=930 [2020-12-23 06:55:13,896 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand 31 states. [2020-12-23 06:55:14,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:55:14,677 INFO L93 Difference]: Finished difference Result 69 states and 72 transitions. [2020-12-23 06:55:14,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-23 06:55:14,678 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 37 [2020-12-23 06:55:14,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:55:14,678 INFO L225 Difference]: With dead ends: 69 [2020-12-23 06:55:14,678 INFO L226 Difference]: Without dead ends: 39 [2020-12-23 06:55:14,679 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=197, Invalid=1363, Unknown=0, NotChecked=0, Total=1560 [2020-12-23 06:55:14,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-12-23 06:55:14,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-12-23 06:55:14,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-12-23 06:55:14,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2020-12-23 06:55:14,686 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 37 [2020-12-23 06:55:14,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:55:14,686 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2020-12-23 06:55:14,686 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-12-23 06:55:14,686 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2020-12-23 06:55:14,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-12-23 06:55:14,687 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:55:14,687 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:55:14,889 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:55:14,889 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:55:14,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:55:14,890 INFO L82 PathProgramCache]: Analyzing trace with hash 713882641, now seen corresponding path program 15 times [2020-12-23 06:55:14,891 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:55:14,891 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263183825] [2020-12-23 06:55:14,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:55:14,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:55:15,157 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 28 proven. 94 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:55:15,157 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263183825] [2020-12-23 06:55:15,158 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1799894108] [2020-12-23 06:55:15,158 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 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 [2020-12-23 06:55:15,243 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-12-23 06:55:15,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:55:15,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 30 conjunts are in the unsatisfiable core [2020-12-23 06:55:15,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:55:15,592 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:55:15,593 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:55:15,593 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 30 [2020-12-23 06:55:15,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306543844] [2020-12-23 06:55:15,594 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-12-23 06:55:15,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:55:15,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-12-23 06:55:15,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=719, Unknown=0, NotChecked=0, Total=870 [2020-12-23 06:55:15,595 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 30 states. [2020-12-23 06:55:16,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:55:16,127 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2020-12-23 06:55:16,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-23 06:55:16,128 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 38 [2020-12-23 06:55:16,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:55:16,129 INFO L225 Difference]: With dead ends: 46 [2020-12-23 06:55:16,129 INFO L226 Difference]: Without dead ends: 44 [2020-12-23 06:55:16,130 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 427 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=386, Invalid=1684, Unknown=0, NotChecked=0, Total=2070 [2020-12-23 06:55:16,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-12-23 06:55:16,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 42. [2020-12-23 06:55:16,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-12-23 06:55:16,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2020-12-23 06:55:16,138 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 38 [2020-12-23 06:55:16,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:55:16,138 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2020-12-23 06:55:16,138 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-12-23 06:55:16,138 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2020-12-23 06:55:16,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-12-23 06:55:16,139 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:55:16,139 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:55:16,342 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:55:16,343 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:55:16,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:55:16,344 INFO L82 PathProgramCache]: Analyzing trace with hash -1395466515, now seen corresponding path program 16 times [2020-12-23 06:55:16,344 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:55:16,344 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34947026] [2020-12-23 06:55:16,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:55:16,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:55:17,228 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 70 proven. 75 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:55:17,228 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34947026] [2020-12-23 06:55:17,228 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1449983805] [2020-12-23 06:55:17,229 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 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 [2020-12-23 06:55:17,282 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 06:55:17,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:55:17,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 41 conjunts are in the unsatisfiable core [2020-12-23 06:55:17,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:55:17,836 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:55:17,838 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 06:55:17,840 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 06:55:17,884 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:55:17,884 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:55:17,884 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 34 [2020-12-23 06:55:17,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481350514] [2020-12-23 06:55:17,885 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-12-23 06:55:17,885 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:55:17,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-12-23 06:55:17,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=987, Unknown=0, NotChecked=0, Total=1122 [2020-12-23 06:55:17,887 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 34 states. [2020-12-23 06:55:18,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:55:18,704 INFO L93 Difference]: Finished difference Result 76 states and 79 transitions. [2020-12-23 06:55:18,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-23 06:55:18,705 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 41 [2020-12-23 06:55:18,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:55:18,705 INFO L225 Difference]: With dead ends: 76 [2020-12-23 06:55:18,706 INFO L226 Difference]: Without dead ends: 43 [2020-12-23 06:55:18,707 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=232, Invalid=1660, Unknown=0, NotChecked=0, Total=1892 [2020-12-23 06:55:18,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-12-23 06:55:18,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2020-12-23 06:55:18,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-12-23 06:55:18,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2020-12-23 06:55:18,715 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 41 [2020-12-23 06:55:18,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:55:18,716 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2020-12-23 06:55:18,716 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-12-23 06:55:18,716 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2020-12-23 06:55:18,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-12-23 06:55:18,716 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:55:18,717 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:55:18,932 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:55:18,933 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:55:18,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:55:18,934 INFO L82 PathProgramCache]: Analyzing trace with hash 1754125365, now seen corresponding path program 17 times [2020-12-23 06:55:18,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:55:18,934 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732753414] [2020-12-23 06:55:18,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:55:18,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:55:19,221 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 36 proven. 119 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:55:19,221 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732753414] [2020-12-23 06:55:19,222 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [629650333] [2020-12-23 06:55:19,222 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:55:19,284 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-12-23 06:55:19,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:55:19,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 33 conjunts are in the unsatisfiable core [2020-12-23 06:55:19,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:55:19,709 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:55:19,709 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:55:19,709 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 33 [2020-12-23 06:55:19,709 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115831612] [2020-12-23 06:55:19,709 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-12-23 06:55:19,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:55:19,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-12-23 06:55:19,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=874, Unknown=0, NotChecked=0, Total=1056 [2020-12-23 06:55:19,711 INFO L87 Difference]: Start difference. First operand 43 states and 44 transitions. Second operand 33 states. [2020-12-23 06:55:20,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:55:20,432 INFO L93 Difference]: Finished difference Result 50 states and 51 transitions. [2020-12-23 06:55:20,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-23 06:55:20,435 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 42 [2020-12-23 06:55:20,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:55:20,436 INFO L225 Difference]: With dead ends: 50 [2020-12-23 06:55:20,436 INFO L226 Difference]: Without dead ends: 48 [2020-12-23 06:55:20,437 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 539 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=469, Invalid=2081, Unknown=0, NotChecked=0, Total=2550 [2020-12-23 06:55:20,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-12-23 06:55:20,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 46. [2020-12-23 06:55:20,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-12-23 06:55:20,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 47 transitions. [2020-12-23 06:55:20,444 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 47 transitions. Word has length 42 [2020-12-23 06:55:20,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:55:20,444 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 47 transitions. [2020-12-23 06:55:20,444 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-12-23 06:55:20,444 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 47 transitions. [2020-12-23 06:55:20,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-12-23 06:55:20,445 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:55:20,445 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:55:20,650 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-12-23 06:55:20,651 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:55:20,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:55:20,652 INFO L82 PathProgramCache]: Analyzing trace with hash 286483529, now seen corresponding path program 18 times [2020-12-23 06:55:20,652 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:55:20,653 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602108831] [2020-12-23 06:55:20,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:55:20,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:55:21,676 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 92 proven. 89 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:55:21,676 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602108831] [2020-12-23 06:55:21,676 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2101797300] [2020-12-23 06:55:21,676 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:55:21,746 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-12-23 06:55:21,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:55:21,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 36 conjunts are in the unsatisfiable core [2020-12-23 06:55:21,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:55:22,939 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:55:22,940 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 06:55:22,946 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 06:55:23,001 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 0 proven. 181 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:55:23,002 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:55:23,002 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24] total 47 [2020-12-23 06:55:23,002 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765214520] [2020-12-23 06:55:23,002 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-12-23 06:55:23,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:55:23,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-12-23 06:55:23,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=225, Invalid=1937, Unknown=0, NotChecked=0, Total=2162 [2020-12-23 06:55:23,004 INFO L87 Difference]: Start difference. First operand 46 states and 47 transitions. Second operand 47 states. [2020-12-23 06:55:24,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:55:24,486 INFO L93 Difference]: Finished difference Result 83 states and 86 transitions. [2020-12-23 06:55:24,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-12-23 06:55:24,487 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 45 [2020-12-23 06:55:24,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:55:24,488 INFO L225 Difference]: With dead ends: 83 [2020-12-23 06:55:24,488 INFO L226 Difference]: Without dead ends: 47 [2020-12-23 06:55:24,490 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 874 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=432, Invalid=4260, Unknown=0, NotChecked=0, Total=4692 [2020-12-23 06:55:24,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-12-23 06:55:24,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2020-12-23 06:55:24,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-12-23 06:55:24,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2020-12-23 06:55:24,503 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 45 [2020-12-23 06:55:24,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:55:24,503 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2020-12-23 06:55:24,503 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-12-23 06:55:24,504 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2020-12-23 06:55:24,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-12-23 06:55:24,504 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:55:24,504 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:55:24,718 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-12-23 06:55:24,719 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:55:24,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:55:24,720 INFO L82 PathProgramCache]: Analyzing trace with hash -532515439, now seen corresponding path program 19 times [2020-12-23 06:55:24,720 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:55:24,721 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041409951] [2020-12-23 06:55:24,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:55:24,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:55:25,039 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 45 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:55:25,039 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041409951] [2020-12-23 06:55:25,040 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [936403685] [2020-12-23 06:55:25,040 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-23 06:55:25,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:55:25,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 36 conjunts are in the unsatisfiable core [2020-12-23 06:55:25,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:55:25,604 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 0 proven. 192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:55:25,605 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:55:25,605 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 36 [2020-12-23 06:55:25,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057112416] [2020-12-23 06:55:25,605 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-12-23 06:55:25,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:55:25,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-12-23 06:55:25,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=1044, Unknown=0, NotChecked=0, Total=1260 [2020-12-23 06:55:25,606 INFO L87 Difference]: Start difference. First operand 47 states and 48 transitions. Second operand 36 states. [2020-12-23 06:55:26,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:55:26,419 INFO L93 Difference]: Finished difference Result 54 states and 55 transitions. [2020-12-23 06:55:26,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-23 06:55:26,419 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 46 [2020-12-23 06:55:26,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:55:26,420 INFO L225 Difference]: With dead ends: 54 [2020-12-23 06:55:26,420 INFO L226 Difference]: Without dead ends: 52 [2020-12-23 06:55:26,421 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 664 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=560, Invalid=2520, Unknown=0, NotChecked=0, Total=3080 [2020-12-23 06:55:26,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-12-23 06:55:26,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 50. [2020-12-23 06:55:26,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-12-23 06:55:26,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 51 transitions. [2020-12-23 06:55:26,427 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 51 transitions. Word has length 46 [2020-12-23 06:55:26,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:55:26,427 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 51 transitions. [2020-12-23 06:55:26,427 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-12-23 06:55:26,428 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 51 transitions. [2020-12-23 06:55:26,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-12-23 06:55:26,428 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:55:26,428 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:55:26,629 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:55:26,629 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:55:26,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:55:26,630 INFO L82 PathProgramCache]: Analyzing trace with hash 1446573421, now seen corresponding path program 20 times [2020-12-23 06:55:26,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:55:26,630 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50841946] [2020-12-23 06:55:26,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:55:26,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:55:27,834 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 117 proven. 104 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:55:27,835 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50841946] [2020-12-23 06:55:27,835 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1762881675] [2020-12-23 06:55:27,835 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 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 [2020-12-23 06:55:27,900 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 06:55:27,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:55:27,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 49 conjunts are in the unsatisfiable core [2020-12-23 06:55:27,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:55:28,775 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:55:28,777 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 06:55:28,786 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 06:55:28,836 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 0 proven. 221 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:55:28,837 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:55:28,837 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26] total 40 [2020-12-23 06:55:28,837 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342528975] [2020-12-23 06:55:28,837 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-12-23 06:55:28,837 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:55:28,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-12-23 06:55:28,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=1377, Unknown=0, NotChecked=0, Total=1560 [2020-12-23 06:55:28,839 INFO L87 Difference]: Start difference. First operand 50 states and 51 transitions. Second operand 40 states. [2020-12-23 06:55:30,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:55:30,081 INFO L93 Difference]: Finished difference Result 90 states and 93 transitions. [2020-12-23 06:55:30,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-12-23 06:55:30,082 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 49 [2020-12-23 06:55:30,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:55:30,083 INFO L225 Difference]: With dead ends: 90 [2020-12-23 06:55:30,083 INFO L226 Difference]: Without dead ends: 51 [2020-12-23 06:55:30,084 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=311, Invalid=2341, Unknown=0, NotChecked=0, Total=2652 [2020-12-23 06:55:30,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-12-23 06:55:30,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-12-23 06:55:30,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-12-23 06:55:30,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2020-12-23 06:55:30,098 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 49 [2020-12-23 06:55:30,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:55:30,099 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2020-12-23 06:55:30,099 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-12-23 06:55:30,099 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2020-12-23 06:55:30,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-12-23 06:55:30,099 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:55:30,099 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:55:30,312 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-12-23 06:55:30,312 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:55:30,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:55:30,313 INFO L82 PathProgramCache]: Analyzing trace with hash -378658123, now seen corresponding path program 21 times [2020-12-23 06:55:30,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:55:30,314 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389846644] [2020-12-23 06:55:30,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:55:30,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:55:30,703 INFO L134 CoverageAnalysis]: Checked inductivity of 233 backedges. 55 proven. 178 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:55:30,703 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389846644] [2020-12-23 06:55:30,703 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2052724425] [2020-12-23 06:55:30,704 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 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 [2020-12-23 06:55:30,783 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2020-12-23 06:55:30,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:55:30,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 39 conjunts are in the unsatisfiable core [2020-12-23 06:55:30,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:55:31,401 INFO L134 CoverageAnalysis]: Checked inductivity of 233 backedges. 0 proven. 233 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:55:31,401 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:55:31,401 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 39 [2020-12-23 06:55:31,402 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525757013] [2020-12-23 06:55:31,402 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-12-23 06:55:31,402 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:55:31,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-12-23 06:55:31,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=1229, Unknown=0, NotChecked=0, Total=1482 [2020-12-23 06:55:31,403 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 39 states. [2020-12-23 06:55:32,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:55:32,439 INFO L93 Difference]: Finished difference Result 58 states and 59 transitions. [2020-12-23 06:55:32,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-12-23 06:55:32,440 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 50 [2020-12-23 06:55:32,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:55:32,440 INFO L225 Difference]: With dead ends: 58 [2020-12-23 06:55:32,440 INFO L226 Difference]: Without dead ends: 56 [2020-12-23 06:55:32,442 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 802 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=659, Invalid=3001, Unknown=0, NotChecked=0, Total=3660 [2020-12-23 06:55:32,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-12-23 06:55:32,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 54. [2020-12-23 06:55:32,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-12-23 06:55:32,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2020-12-23 06:55:32,449 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 50 [2020-12-23 06:55:32,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:55:32,449 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2020-12-23 06:55:32,449 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-12-23 06:55:32,449 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2020-12-23 06:55:32,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-12-23 06:55:32,449 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:55:32,450 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:55:32,650 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:55:32,650 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:55:32,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:55:32,651 INFO L82 PathProgramCache]: Analyzing trace with hash -2015197751, now seen corresponding path program 22 times [2020-12-23 06:55:32,652 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:55:32,652 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400003654] [2020-12-23 06:55:32,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:55:32,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:55:34,068 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 145 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:55:34,068 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400003654] [2020-12-23 06:55:34,068 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1884901443] [2020-12-23 06:55:34,069 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 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 [2020-12-23 06:55:34,138 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 06:55:34,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:55:34,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 53 conjunts are in the unsatisfiable core [2020-12-23 06:55:34,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:55:35,132 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:55:35,134 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 06:55:35,136 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 06:55:35,196 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 0 proven. 265 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:55:35,196 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:55:35,197 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28] total 43 [2020-12-23 06:55:35,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667794930] [2020-12-23 06:55:35,197 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-12-23 06:55:35,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:55:35,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-12-23 06:55:35,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=1596, Unknown=0, NotChecked=0, Total=1806 [2020-12-23 06:55:35,198 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand 43 states. [2020-12-23 06:55:36,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:55:36,854 INFO L93 Difference]: Finished difference Result 97 states and 100 transitions. [2020-12-23 06:55:36,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-12-23 06:55:36,855 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 53 [2020-12-23 06:55:36,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:55:36,856 INFO L225 Difference]: With dead ends: 97 [2020-12-23 06:55:36,856 INFO L226 Difference]: Without dead ends: 55 [2020-12-23 06:55:36,857 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 409 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=355, Invalid=2725, Unknown=0, NotChecked=0, Total=3080 [2020-12-23 06:55:36,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-12-23 06:55:36,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2020-12-23 06:55:36,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-12-23 06:55:36,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 56 transitions. [2020-12-23 06:55:36,867 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 56 transitions. Word has length 53 [2020-12-23 06:55:36,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:55:36,867 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 56 transitions. [2020-12-23 06:55:36,867 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-12-23 06:55:36,867 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 56 transitions. [2020-12-23 06:55:36,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-12-23 06:55:36,868 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:55:36,868 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:55:37,082 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-12-23 06:55:37,083 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:55:37,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:55:37,083 INFO L82 PathProgramCache]: Analyzing trace with hash -156250351, now seen corresponding path program 23 times [2020-12-23 06:55:37,084 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:55:37,084 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358533791] [2020-12-23 06:55:37,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:55:37,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:55:37,585 INFO L134 CoverageAnalysis]: Checked inductivity of 278 backedges. 66 proven. 212 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:55:37,585 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358533791] [2020-12-23 06:55:37,585 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [860135643] [2020-12-23 06:55:37,585 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:55:37,660 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-12-23 06:55:37,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:55:37,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 42 conjunts are in the unsatisfiable core [2020-12-23 06:55:37,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:55:38,397 INFO L134 CoverageAnalysis]: Checked inductivity of 278 backedges. 0 proven. 278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:55:38,397 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:55:38,397 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 42 [2020-12-23 06:55:38,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123685332] [2020-12-23 06:55:38,398 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-12-23 06:55:38,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:55:38,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-12-23 06:55:38,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=293, Invalid=1429, Unknown=0, NotChecked=0, Total=1722 [2020-12-23 06:55:38,399 INFO L87 Difference]: Start difference. First operand 55 states and 56 transitions. Second operand 42 states. [2020-12-23 06:55:39,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:55:39,583 INFO L93 Difference]: Finished difference Result 62 states and 63 transitions. [2020-12-23 06:55:39,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-12-23 06:55:39,584 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 54 [2020-12-23 06:55:39,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:55:39,585 INFO L225 Difference]: With dead ends: 62 [2020-12-23 06:55:39,585 INFO L226 Difference]: Without dead ends: 60 [2020-12-23 06:55:39,587 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 953 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=766, Invalid=3524, Unknown=0, NotChecked=0, Total=4290 [2020-12-23 06:55:39,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-12-23 06:55:39,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 58. [2020-12-23 06:55:39,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-12-23 06:55:39,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 59 transitions. [2020-12-23 06:55:39,595 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 59 transitions. Word has length 54 [2020-12-23 06:55:39,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:55:39,595 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 59 transitions. [2020-12-23 06:55:39,596 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-12-23 06:55:39,596 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 59 transitions. [2020-12-23 06:55:39,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-12-23 06:55:39,596 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:55:39,596 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:55:39,809 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-12-23 06:55:39,810 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:55:39,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:55:39,811 INFO L82 PathProgramCache]: Analyzing trace with hash 895167469, now seen corresponding path program 24 times [2020-12-23 06:55:39,811 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:55:39,811 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298651057] [2020-12-23 06:55:39,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:55:39,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:55:41,373 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 176 proven. 137 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:55:41,374 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298651057] [2020-12-23 06:55:41,374 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [166156779] [2020-12-23 06:55:41,374 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 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 [2020-12-23 06:55:41,462 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-12-23 06:55:41,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:55:41,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 45 conjunts are in the unsatisfiable core [2020-12-23 06:55:41,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:55:43,476 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:55:43,478 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 06:55:43,479 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 06:55:43,556 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 0 proven. 313 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:55:43,557 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:55:43,557 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30] total 59 [2020-12-23 06:55:43,557 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971812025] [2020-12-23 06:55:43,558 INFO L461 AbstractCegarLoop]: Interpolant automaton has 59 states [2020-12-23 06:55:43,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:55:43,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2020-12-23 06:55:43,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=345, Invalid=3077, Unknown=0, NotChecked=0, Total=3422 [2020-12-23 06:55:43,559 INFO L87 Difference]: Start difference. First operand 58 states and 59 transitions. Second operand 59 states. [2020-12-23 06:55:46,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:55:46,018 INFO L93 Difference]: Finished difference Result 104 states and 107 transitions. [2020-12-23 06:55:46,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-12-23 06:55:46,019 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 57 [2020-12-23 06:55:46,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:55:46,020 INFO L225 Difference]: With dead ends: 104 [2020-12-23 06:55:46,021 INFO L226 Difference]: Without dead ends: 59 [2020-12-23 06:55:46,022 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1429 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=648, Invalid=6834, Unknown=0, NotChecked=0, Total=7482 [2020-12-23 06:55:46,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-12-23 06:55:46,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2020-12-23 06:55:46,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-12-23 06:55:46,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 60 transitions. [2020-12-23 06:55:46,032 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 60 transitions. Word has length 57 [2020-12-23 06:55:46,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:55:46,033 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 60 transitions. [2020-12-23 06:55:46,033 INFO L482 AbstractCegarLoop]: Interpolant automaton has 59 states. [2020-12-23 06:55:46,033 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 60 transitions. [2020-12-23 06:55:46,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-12-23 06:55:46,033 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:55:46,033 INFO L422 BasicCegarLoop]: trace histogram [14, 13, 12, 12, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:55:46,234 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-12-23 06:55:46,234 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:55:46,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:55:46,235 INFO L82 PathProgramCache]: Analyzing trace with hash 2119340341, now seen corresponding path program 25 times [2020-12-23 06:55:46,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:55:46,236 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795158724] [2020-12-23 06:55:46,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:55:46,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:55:46,741 INFO L134 CoverageAnalysis]: Checked inductivity of 327 backedges. 78 proven. 249 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:55:46,742 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795158724] [2020-12-23 06:55:46,742 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1647053290] [2020-12-23 06:55:46,742 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 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 [2020-12-23 06:55:46,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:55:46,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 45 conjunts are in the unsatisfiable core [2020-12-23 06:55:46,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:55:47,586 INFO L134 CoverageAnalysis]: Checked inductivity of 327 backedges. 0 proven. 327 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:55:47,586 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:55:47,587 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 45 [2020-12-23 06:55:47,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003210319] [2020-12-23 06:55:47,587 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-12-23 06:55:47,587 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:55:47,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-12-23 06:55:47,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=336, Invalid=1644, Unknown=0, NotChecked=0, Total=1980 [2020-12-23 06:55:47,588 INFO L87 Difference]: Start difference. First operand 59 states and 60 transitions. Second operand 45 states. [2020-12-23 06:55:48,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:55:48,844 INFO L93 Difference]: Finished difference Result 66 states and 67 transitions. [2020-12-23 06:55:48,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-12-23 06:55:48,845 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 58 [2020-12-23 06:55:48,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:55:48,845 INFO L225 Difference]: With dead ends: 66 [2020-12-23 06:55:48,846 INFO L226 Difference]: Without dead ends: 64 [2020-12-23 06:55:48,846 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1117 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=881, Invalid=4089, Unknown=0, NotChecked=0, Total=4970 [2020-12-23 06:55:48,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-12-23 06:55:48,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 62. [2020-12-23 06:55:48,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-12-23 06:55:48,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 63 transitions. [2020-12-23 06:55:48,855 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 63 transitions. Word has length 58 [2020-12-23 06:55:48,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:55:48,855 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 63 transitions. [2020-12-23 06:55:48,855 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-12-23 06:55:48,855 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 63 transitions. [2020-12-23 06:55:48,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-12-23 06:55:48,856 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:55:48,856 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:55:49,071 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:55:49,072 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:55:49,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:55:49,073 INFO L82 PathProgramCache]: Analyzing trace with hash 1253672777, now seen corresponding path program 26 times [2020-12-23 06:55:49,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:55:49,073 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88059802] [2020-12-23 06:55:49,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:55:49,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:55:50,719 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 210 proven. 155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:55:50,720 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88059802] [2020-12-23 06:55:50,720 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730976559] [2020-12-23 06:55:50,720 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:55:50,793 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 06:55:50,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:55:50,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 48 conjunts are in the unsatisfiable core [2020-12-23 06:55:50,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:55:53,054 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:55:53,055 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 06:55:53,057 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 06:55:53,138 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 0 proven. 365 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:55:53,139 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:55:53,139 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32] total 63 [2020-12-23 06:55:53,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821039354] [2020-12-23 06:55:53,139 INFO L461 AbstractCegarLoop]: Interpolant automaton has 63 states [2020-12-23 06:55:53,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:55:53,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2020-12-23 06:55:53,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=391, Invalid=3515, Unknown=0, NotChecked=0, Total=3906 [2020-12-23 06:55:53,140 INFO L87 Difference]: Start difference. First operand 62 states and 63 transitions. Second operand 63 states. [2020-12-23 06:55:55,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:55:55,968 INFO L93 Difference]: Finished difference Result 111 states and 114 transitions. [2020-12-23 06:55:55,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-12-23 06:55:55,969 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 61 [2020-12-23 06:55:55,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:55:55,970 INFO L225 Difference]: With dead ends: 111 [2020-12-23 06:55:55,970 INFO L226 Difference]: Without dead ends: 63 [2020-12-23 06:55:55,971 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1644 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=730, Invalid=7826, Unknown=0, NotChecked=0, Total=8556 [2020-12-23 06:55:55,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-12-23 06:55:55,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2020-12-23 06:55:55,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-12-23 06:55:55,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2020-12-23 06:55:55,979 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 61 [2020-12-23 06:55:55,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:55:55,979 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2020-12-23 06:55:55,979 INFO L482 AbstractCegarLoop]: Interpolant automaton has 63 states. [2020-12-23 06:55:55,979 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2020-12-23 06:55:55,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-12-23 06:55:55,980 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:55:55,980 INFO L422 BasicCegarLoop]: trace histogram [15, 14, 13, 13, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:55:56,182 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2020-12-23 06:55:56,183 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:55:56,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:55:56,184 INFO L82 PathProgramCache]: Analyzing trace with hash -747829103, now seen corresponding path program 27 times [2020-12-23 06:55:56,184 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:55:56,184 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497244929] [2020-12-23 06:55:56,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:55:56,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:55:56,782 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 91 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:55:56,782 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497244929] [2020-12-23 06:55:56,782 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1996829515] [2020-12-23 06:55:56,782 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 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 [2020-12-23 06:55:56,867 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2020-12-23 06:55:56,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:55:56,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 48 conjunts are in the unsatisfiable core [2020-12-23 06:55:56,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:55:57,866 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:55:57,866 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:55:57,866 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 48 [2020-12-23 06:55:57,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024693557] [2020-12-23 06:55:57,867 INFO L461 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-12-23 06:55:57,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:55:57,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-12-23 06:55:57,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=382, Invalid=1874, Unknown=0, NotChecked=0, Total=2256 [2020-12-23 06:55:57,867 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand 48 states. [2020-12-23 06:55:59,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:55:59,437 INFO L93 Difference]: Finished difference Result 70 states and 71 transitions. [2020-12-23 06:55:59,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-12-23 06:55:59,438 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 62 [2020-12-23 06:55:59,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:55:59,438 INFO L225 Difference]: With dead ends: 70 [2020-12-23 06:55:59,439 INFO L226 Difference]: Without dead ends: 68 [2020-12-23 06:55:59,439 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1294 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1004, Invalid=4696, Unknown=0, NotChecked=0, Total=5700 [2020-12-23 06:55:59,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-12-23 06:55:59,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 66. [2020-12-23 06:55:59,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-12-23 06:55:59,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 67 transitions. [2020-12-23 06:55:59,451 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 67 transitions. Word has length 62 [2020-12-23 06:55:59,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:55:59,451 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 67 transitions. [2020-12-23 06:55:59,451 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-12-23 06:55:59,451 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 67 transitions. [2020-12-23 06:55:59,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-12-23 06:55:59,452 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:55:59,452 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:55:59,665 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:55:59,666 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:55:59,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:55:59,666 INFO L82 PathProgramCache]: Analyzing trace with hash -576617875, now seen corresponding path program 28 times [2020-12-23 06:55:59,667 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:55:59,667 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375318185] [2020-12-23 06:55:59,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:55:59,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:56:01,865 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 247 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:56:01,865 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375318185] [2020-12-23 06:56:01,865 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1439740565] [2020-12-23 06:56:01,865 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:56:01,944 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 06:56:01,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:56:01,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 65 conjunts are in the unsatisfiable core [2020-12-23 06:56:01,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:56:03,520 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:56:03,521 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 06:56:03,522 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 06:56:03,598 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 0 proven. 421 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:56:03,598 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:56:03,598 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34] total 52 [2020-12-23 06:56:03,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702638633] [2020-12-23 06:56:03,599 INFO L461 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-12-23 06:56:03,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:56:03,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-12-23 06:56:03,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=303, Invalid=2349, Unknown=0, NotChecked=0, Total=2652 [2020-12-23 06:56:03,600 INFO L87 Difference]: Start difference. First operand 66 states and 67 transitions. Second operand 52 states. [2020-12-23 06:56:06,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:56:06,048 INFO L93 Difference]: Finished difference Result 118 states and 121 transitions. [2020-12-23 06:56:06,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-12-23 06:56:06,049 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 65 [2020-12-23 06:56:06,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:56:06,050 INFO L225 Difference]: With dead ends: 118 [2020-12-23 06:56:06,050 INFO L226 Difference]: Without dead ends: 67 [2020-12-23 06:56:06,051 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 601 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=505, Invalid=4051, Unknown=0, NotChecked=0, Total=4556 [2020-12-23 06:56:06,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-12-23 06:56:06,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2020-12-23 06:56:06,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-12-23 06:56:06,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 68 transitions. [2020-12-23 06:56:06,061 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 68 transitions. Word has length 65 [2020-12-23 06:56:06,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:56:06,062 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 68 transitions. [2020-12-23 06:56:06,062 INFO L482 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-12-23 06:56:06,062 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 68 transitions. [2020-12-23 06:56:06,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-23 06:56:06,062 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:56:06,063 INFO L422 BasicCegarLoop]: trace histogram [16, 15, 14, 14, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:56:06,264 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2020-12-23 06:56:06,265 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:56:06,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:56:06,266 INFO L82 PathProgramCache]: Analyzing trace with hash -224190539, now seen corresponding path program 29 times [2020-12-23 06:56:06,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:56:06,267 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49869934] [2020-12-23 06:56:06,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:56:06,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:56:07,035 INFO L134 CoverageAnalysis]: Checked inductivity of 437 backedges. 105 proven. 332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:56:07,035 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49869934] [2020-12-23 06:56:07,035 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [503406696] [2020-12-23 06:56:07,035 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:56:07,125 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2020-12-23 06:56:07,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:56:07,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 51 conjunts are in the unsatisfiable core [2020-12-23 06:56:07,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:56:08,260 INFO L134 CoverageAnalysis]: Checked inductivity of 437 backedges. 0 proven. 437 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:56:08,260 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:56:08,260 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 51 [2020-12-23 06:56:08,260 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770269717] [2020-12-23 06:56:08,261 INFO L461 AbstractCegarLoop]: Interpolant automaton has 51 states [2020-12-23 06:56:08,261 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:56:08,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-12-23 06:56:08,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=431, Invalid=2119, Unknown=0, NotChecked=0, Total=2550 [2020-12-23 06:56:08,262 INFO L87 Difference]: Start difference. First operand 67 states and 68 transitions. Second operand 51 states. [2020-12-23 06:56:10,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:56:10,126 INFO L93 Difference]: Finished difference Result 74 states and 75 transitions. [2020-12-23 06:56:10,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-12-23 06:56:10,127 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 66 [2020-12-23 06:56:10,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:56:10,128 INFO L225 Difference]: With dead ends: 74 [2020-12-23 06:56:10,128 INFO L226 Difference]: Without dead ends: 72 [2020-12-23 06:56:10,129 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1484 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1135, Invalid=5345, Unknown=0, NotChecked=0, Total=6480 [2020-12-23 06:56:10,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-12-23 06:56:10,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 70. [2020-12-23 06:56:10,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-12-23 06:56:10,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 71 transitions. [2020-12-23 06:56:10,143 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 71 transitions. Word has length 66 [2020-12-23 06:56:10,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:56:10,143 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 71 transitions. [2020-12-23 06:56:10,144 INFO L482 AbstractCegarLoop]: Interpolant automaton has 51 states. [2020-12-23 06:56:10,144 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 71 transitions. [2020-12-23 06:56:10,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-12-23 06:56:10,144 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:56:10,144 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:56:10,359 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-12-23 06:56:10,360 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:56:10,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:56:10,360 INFO L82 PathProgramCache]: Analyzing trace with hash -181376823, now seen corresponding path program 30 times [2020-12-23 06:56:10,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:56:10,361 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235531544] [2020-12-23 06:56:10,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:56:10,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:56:12,800 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 287 proven. 194 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:56:12,800 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235531544] [2020-12-23 06:56:12,800 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [147082335] [2020-12-23 06:56:12,800 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:56:12,896 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2020-12-23 06:56:12,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:56:12,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 54 conjunts are in the unsatisfiable core [2020-12-23 06:56:12,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:56:16,209 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:56:16,211 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 06:56:16,214 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 06:56:16,323 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 0 proven. 481 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:56:16,323 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:56:16,323 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 36] total 71 [2020-12-23 06:56:16,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963051168] [2020-12-23 06:56:16,324 INFO L461 AbstractCegarLoop]: Interpolant automaton has 71 states [2020-12-23 06:56:16,324 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:56:16,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2020-12-23 06:56:16,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=492, Invalid=4478, Unknown=0, NotChecked=0, Total=4970 [2020-12-23 06:56:16,325 INFO L87 Difference]: Start difference. First operand 70 states and 71 transitions. Second operand 71 states. [2020-12-23 06:56:20,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:56:20,622 INFO L93 Difference]: Finished difference Result 125 states and 128 transitions. [2020-12-23 06:56:20,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-12-23 06:56:20,627 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 69 [2020-12-23 06:56:20,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:56:20,628 INFO L225 Difference]: With dead ends: 125 [2020-12-23 06:56:20,635 INFO L226 Difference]: Without dead ends: 71 [2020-12-23 06:56:20,636 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2119 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=909, Invalid=10011, Unknown=0, NotChecked=0, Total=10920 [2020-12-23 06:56:20,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-12-23 06:56:20,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2020-12-23 06:56:20,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-12-23 06:56:20,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 72 transitions. [2020-12-23 06:56:20,651 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 72 transitions. Word has length 69 [2020-12-23 06:56:20,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:56:20,651 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 72 transitions. [2020-12-23 06:56:20,651 INFO L482 AbstractCegarLoop]: Interpolant automaton has 71 states. [2020-12-23 06:56:20,651 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 72 transitions. [2020-12-23 06:56:20,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-12-23 06:56:20,652 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:56:20,652 INFO L422 BasicCegarLoop]: trace histogram [17, 16, 15, 15, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:56:20,860 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2020-12-23 06:56:20,861 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:56:20,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:56:20,861 INFO L82 PathProgramCache]: Analyzing trace with hash 1242702353, now seen corresponding path program 31 times [2020-12-23 06:56:20,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:56:20,862 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347696886] [2020-12-23 06:56:20,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:56:20,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:56:21,799 INFO L134 CoverageAnalysis]: Checked inductivity of 498 backedges. 120 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:56:21,800 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347696886] [2020-12-23 06:56:21,800 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1517126845] [2020-12-23 06:56:21,800 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:56:21,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:56:21,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 54 conjunts are in the unsatisfiable core [2020-12-23 06:56:21,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:56:23,148 INFO L134 CoverageAnalysis]: Checked inductivity of 498 backedges. 0 proven. 498 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:56:23,149 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:56:23,149 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 54 [2020-12-23 06:56:23,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693404766] [2020-12-23 06:56:23,149 INFO L461 AbstractCegarLoop]: Interpolant automaton has 54 states [2020-12-23 06:56:23,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:56:23,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2020-12-23 06:56:23,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=483, Invalid=2379, Unknown=0, NotChecked=0, Total=2862 [2020-12-23 06:56:23,153 INFO L87 Difference]: Start difference. First operand 71 states and 72 transitions. Second operand 54 states. [2020-12-23 06:56:25,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:56:25,280 INFO L93 Difference]: Finished difference Result 78 states and 79 transitions. [2020-12-23 06:56:25,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-12-23 06:56:25,281 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 70 [2020-12-23 06:56:25,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:56:25,282 INFO L225 Difference]: With dead ends: 78 [2020-12-23 06:56:25,282 INFO L226 Difference]: Without dead ends: 76 [2020-12-23 06:56:25,283 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1687 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=1274, Invalid=6036, Unknown=0, NotChecked=0, Total=7310 [2020-12-23 06:56:25,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-12-23 06:56:25,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 74. [2020-12-23 06:56:25,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-12-23 06:56:25,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 75 transitions. [2020-12-23 06:56:25,301 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 75 transitions. Word has length 70 [2020-12-23 06:56:25,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:56:25,301 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 75 transitions. [2020-12-23 06:56:25,301 INFO L482 AbstractCegarLoop]: Interpolant automaton has 54 states. [2020-12-23 06:56:25,301 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 75 transitions. [2020-12-23 06:56:25,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-12-23 06:56:25,302 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:56:25,302 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:56:25,502 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-12-23 06:56:25,503 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:56:25,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:56:25,504 INFO L82 PathProgramCache]: Analyzing trace with hash -1267468051, now seen corresponding path program 32 times [2020-12-23 06:56:25,504 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:56:25,504 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626747130] [2020-12-23 06:56:25,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:56:25,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:56:28,531 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 330 proven. 215 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:56:28,531 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626747130] [2020-12-23 06:56:28,531 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [571453053] [2020-12-23 06:56:28,531 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 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 [2020-12-23 06:56:28,618 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 06:56:28,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:56:28,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 73 conjunts are in the unsatisfiable core [2020-12-23 06:56:28,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:56:30,775 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:56:30,777 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 06:56:30,778 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 06:56:30,877 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 0 proven. 545 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:56:30,877 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:56:30,877 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 38] total 58 [2020-12-23 06:56:30,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658241822] [2020-12-23 06:56:30,878 INFO L461 AbstractCegarLoop]: Interpolant automaton has 58 states [2020-12-23 06:56:30,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:56:30,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2020-12-23 06:56:30,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=375, Invalid=2931, Unknown=0, NotChecked=0, Total=3306 [2020-12-23 06:56:30,879 INFO L87 Difference]: Start difference. First operand 74 states and 75 transitions. Second operand 58 states. [2020-12-23 06:56:34,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:56:34,170 INFO L93 Difference]: Finished difference Result 132 states and 135 transitions. [2020-12-23 06:56:34,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-12-23 06:56:34,171 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 73 [2020-12-23 06:56:34,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:56:34,174 INFO L225 Difference]: With dead ends: 132 [2020-12-23 06:56:34,174 INFO L226 Difference]: Without dead ends: 75 [2020-12-23 06:56:34,175 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 749 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=620, Invalid=5080, Unknown=0, NotChecked=0, Total=5700 [2020-12-23 06:56:34,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-12-23 06:56:34,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2020-12-23 06:56:34,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-12-23 06:56:34,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 76 transitions. [2020-12-23 06:56:34,187 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 76 transitions. Word has length 73 [2020-12-23 06:56:34,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:56:34,188 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 76 transitions. [2020-12-23 06:56:34,188 INFO L482 AbstractCegarLoop]: Interpolant automaton has 58 states. [2020-12-23 06:56:34,188 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 76 transitions. [2020-12-23 06:56:34,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-12-23 06:56:34,188 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:56:34,188 INFO L422 BasicCegarLoop]: trace histogram [18, 17, 16, 16, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:56:34,390 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-12-23 06:56:34,391 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:56:34,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:56:34,391 INFO L82 PathProgramCache]: Analyzing trace with hash -473444811, now seen corresponding path program 33 times [2020-12-23 06:56:34,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:56:34,392 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227130464] [2020-12-23 06:56:34,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:56:34,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:56:35,489 INFO L134 CoverageAnalysis]: Checked inductivity of 563 backedges. 136 proven. 427 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:56:35,489 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227130464] [2020-12-23 06:56:35,489 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [567176008] [2020-12-23 06:56:35,489 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 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 [2020-12-23 06:56:35,593 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2020-12-23 06:56:35,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:56:35,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 57 conjunts are in the unsatisfiable core [2020-12-23 06:56:35,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:56:37,153 INFO L134 CoverageAnalysis]: Checked inductivity of 563 backedges. 0 proven. 563 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:56:37,153 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:56:37,153 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 57 [2020-12-23 06:56:37,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906728190] [2020-12-23 06:56:37,154 INFO L461 AbstractCegarLoop]: Interpolant automaton has 57 states [2020-12-23 06:56:37,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:56:37,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2020-12-23 06:56:37,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=538, Invalid=2654, Unknown=0, NotChecked=0, Total=3192 [2020-12-23 06:56:37,155 INFO L87 Difference]: Start difference. First operand 75 states and 76 transitions. Second operand 57 states. [2020-12-23 06:56:39,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:56:39,461 INFO L93 Difference]: Finished difference Result 82 states and 83 transitions. [2020-12-23 06:56:39,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-12-23 06:56:39,463 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 74 [2020-12-23 06:56:39,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:56:39,464 INFO L225 Difference]: With dead ends: 82 [2020-12-23 06:56:39,464 INFO L226 Difference]: Without dead ends: 80 [2020-12-23 06:56:39,464 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1903 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=1421, Invalid=6769, Unknown=0, NotChecked=0, Total=8190 [2020-12-23 06:56:39,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-12-23 06:56:39,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 78. [2020-12-23 06:56:39,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-12-23 06:56:39,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 79 transitions. [2020-12-23 06:56:39,476 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 79 transitions. Word has length 74 [2020-12-23 06:56:39,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:56:39,477 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 79 transitions. [2020-12-23 06:56:39,477 INFO L482 AbstractCegarLoop]: Interpolant automaton has 57 states. [2020-12-23 06:56:39,477 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 79 transitions. [2020-12-23 06:56:39,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-12-23 06:56:39,477 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:56:39,478 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:56:39,683 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-12-23 06:56:39,684 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:56:39,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:56:39,685 INFO L82 PathProgramCache]: Analyzing trace with hash 283060809, now seen corresponding path program 34 times [2020-12-23 06:56:39,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:56:39,685 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501479690] [2020-12-23 06:56:39,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:56:39,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:56:42,929 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 376 proven. 237 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:56:42,929 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501479690] [2020-12-23 06:56:42,929 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [43389210] [2020-12-23 06:56:42,929 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 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 [2020-12-23 06:56:43,028 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 06:56:43,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:56:43,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 77 conjunts are in the unsatisfiable core [2020-12-23 06:56:43,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:56:45,467 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:56:45,469 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 06:56:45,471 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 06:56:45,577 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 0 proven. 613 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:56:45,578 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:56:45,578 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 40] total 61 [2020-12-23 06:56:45,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700423200] [2020-12-23 06:56:45,578 INFO L461 AbstractCegarLoop]: Interpolant automaton has 61 states [2020-12-23 06:56:45,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:56:45,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2020-12-23 06:56:45,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=414, Invalid=3246, Unknown=0, NotChecked=0, Total=3660 [2020-12-23 06:56:45,579 INFO L87 Difference]: Start difference. First operand 78 states and 79 transitions. Second operand 61 states. [2020-12-23 06:56:50,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:56:50,093 INFO L93 Difference]: Finished difference Result 139 states and 142 transitions. [2020-12-23 06:56:50,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-12-23 06:56:50,097 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 77 [2020-12-23 06:56:50,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:56:50,098 INFO L225 Difference]: With dead ends: 139 [2020-12-23 06:56:50,098 INFO L226 Difference]: Without dead ends: 79 [2020-12-23 06:56:50,099 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 829 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=682, Invalid=5638, Unknown=0, NotChecked=0, Total=6320 [2020-12-23 06:56:50,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-12-23 06:56:50,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2020-12-23 06:56:50,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-12-23 06:56:50,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 80 transitions. [2020-12-23 06:56:50,116 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 80 transitions. Word has length 77 [2020-12-23 06:56:50,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:56:50,117 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 80 transitions. [2020-12-23 06:56:50,117 INFO L482 AbstractCegarLoop]: Interpolant automaton has 61 states. [2020-12-23 06:56:50,117 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 80 transitions. [2020-12-23 06:56:50,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-12-23 06:56:50,117 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:56:50,117 INFO L422 BasicCegarLoop]: trace histogram [19, 18, 17, 17, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:56:50,321 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-12-23 06:56:50,321 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:56:50,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:56:50,322 INFO L82 PathProgramCache]: Analyzing trace with hash 473373585, now seen corresponding path program 35 times [2020-12-23 06:56:50,322 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:56:50,323 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277594384] [2020-12-23 06:56:50,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:56:50,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:56:51,549 INFO L134 CoverageAnalysis]: Checked inductivity of 632 backedges. 153 proven. 479 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:56:51,549 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277594384] [2020-12-23 06:56:51,549 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1096358516] [2020-12-23 06:56:51,549 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 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 [2020-12-23 06:56:51,650 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2020-12-23 06:56:51,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:56:51,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 60 conjunts are in the unsatisfiable core [2020-12-23 06:56:51,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:56:53,387 INFO L134 CoverageAnalysis]: Checked inductivity of 632 backedges. 0 proven. 632 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:56:53,388 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:56:53,388 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 60 [2020-12-23 06:56:53,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849925781] [2020-12-23 06:56:53,388 INFO L461 AbstractCegarLoop]: Interpolant automaton has 60 states [2020-12-23 06:56:53,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:56:53,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2020-12-23 06:56:53,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=596, Invalid=2944, Unknown=0, NotChecked=0, Total=3540 [2020-12-23 06:56:53,389 INFO L87 Difference]: Start difference. First operand 79 states and 80 transitions. Second operand 60 states. [2020-12-23 06:56:55,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:56:55,981 INFO L93 Difference]: Finished difference Result 86 states and 87 transitions. [2020-12-23 06:56:55,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-12-23 06:56:55,982 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 78 [2020-12-23 06:56:55,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:56:55,983 INFO L225 Difference]: With dead ends: 86 [2020-12-23 06:56:55,983 INFO L226 Difference]: Without dead ends: 84 [2020-12-23 06:56:55,984 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2132 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=1576, Invalid=7544, Unknown=0, NotChecked=0, Total=9120 [2020-12-23 06:56:55,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-12-23 06:56:55,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 82. [2020-12-23 06:56:55,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-12-23 06:56:55,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 83 transitions. [2020-12-23 06:56:55,998 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 83 transitions. Word has length 78 [2020-12-23 06:56:55,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:56:55,999 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 83 transitions. [2020-12-23 06:56:55,999 INFO L482 AbstractCegarLoop]: Interpolant automaton has 60 states. [2020-12-23 06:56:55,999 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 83 transitions. [2020-12-23 06:56:55,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-23 06:56:56,000 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:56:56,000 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:56:56,209 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-12-23 06:56:56,209 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:56:56,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:56:56,210 INFO L82 PathProgramCache]: Analyzing trace with hash 1899663213, now seen corresponding path program 36 times [2020-12-23 06:56:56,210 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:56:56,211 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682805279] [2020-12-23 06:56:56,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:56:56,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:56:59,822 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 425 proven. 260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:56:59,823 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682805279] [2020-12-23 06:56:59,825 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1261984669] [2020-12-23 06:56:59,825 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 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 [2020-12-23 06:56:59,940 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2020-12-23 06:56:59,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:56:59,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 92 conjunts are in the unsatisfiable core [2020-12-23 06:56:59,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:57:04,715 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 06:57:04,718 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 06:57:04,848 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 0 proven. 685 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:57:04,848 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:57:04,848 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 83 [2020-12-23 06:57:04,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703835843] [2020-12-23 06:57:04,849 INFO L461 AbstractCegarLoop]: Interpolant automaton has 83 states [2020-12-23 06:57:04,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:57:04,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2020-12-23 06:57:04,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=526, Invalid=6280, Unknown=0, NotChecked=0, Total=6806 [2020-12-23 06:57:04,849 INFO L87 Difference]: Start difference. First operand 82 states and 83 transitions. Second operand 83 states. [2020-12-23 06:57:09,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:57:09,409 INFO L93 Difference]: Finished difference Result 146 states and 149 transitions. [2020-12-23 06:57:09,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-12-23 06:57:09,410 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 81 [2020-12-23 06:57:09,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:57:09,411 INFO L225 Difference]: With dead ends: 146 [2020-12-23 06:57:09,411 INFO L226 Difference]: Without dead ends: 83 [2020-12-23 06:57:09,412 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2168 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=801, Invalid=9501, Unknown=0, NotChecked=0, Total=10302 [2020-12-23 06:57:09,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-12-23 06:57:09,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2020-12-23 06:57:09,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-12-23 06:57:09,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 84 transitions. [2020-12-23 06:57:09,427 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 84 transitions. Word has length 81 [2020-12-23 06:57:09,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:57:09,427 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 84 transitions. [2020-12-23 06:57:09,427 INFO L482 AbstractCegarLoop]: Interpolant automaton has 83 states. [2020-12-23 06:57:09,427 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 84 transitions. [2020-12-23 06:57:09,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-12-23 06:57:09,427 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:57:09,427 INFO L422 BasicCegarLoop]: trace histogram [20, 19, 18, 18, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:57:09,628 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:57:09,629 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:57:09,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:57:09,629 INFO L82 PathProgramCache]: Analyzing trace with hash 1093180597, now seen corresponding path program 37 times [2020-12-23 06:57:09,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:57:09,630 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604451011] [2020-12-23 06:57:09,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:57:09,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:57:10,878 INFO L134 CoverageAnalysis]: Checked inductivity of 705 backedges. 171 proven. 534 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:57:10,879 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604451011] [2020-12-23 06:57:10,879 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [599145756] [2020-12-23 06:57:10,879 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 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 [2020-12-23 06:57:10,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:57:10,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 63 conjunts are in the unsatisfiable core [2020-12-23 06:57:10,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:57:12,767 INFO L134 CoverageAnalysis]: Checked inductivity of 705 backedges. 0 proven. 705 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:57:12,768 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:57:12,768 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 63 [2020-12-23 06:57:12,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508616982] [2020-12-23 06:57:12,768 INFO L461 AbstractCegarLoop]: Interpolant automaton has 63 states [2020-12-23 06:57:12,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:57:12,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2020-12-23 06:57:12,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=657, Invalid=3249, Unknown=0, NotChecked=0, Total=3906 [2020-12-23 06:57:12,769 INFO L87 Difference]: Start difference. First operand 83 states and 84 transitions. Second operand 63 states. [2020-12-23 06:57:15,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:57:15,483 INFO L93 Difference]: Finished difference Result 90 states and 91 transitions. [2020-12-23 06:57:15,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-12-23 06:57:15,484 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 82 [2020-12-23 06:57:15,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:57:15,485 INFO L225 Difference]: With dead ends: 90 [2020-12-23 06:57:15,485 INFO L226 Difference]: Without dead ends: 88 [2020-12-23 06:57:15,486 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2374 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=1739, Invalid=8361, Unknown=0, NotChecked=0, Total=10100 [2020-12-23 06:57:15,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-12-23 06:57:15,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 86. [2020-12-23 06:57:15,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-12-23 06:57:15,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 87 transitions. [2020-12-23 06:57:15,503 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 87 transitions. Word has length 82 [2020-12-23 06:57:15,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:57:15,503 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 87 transitions. [2020-12-23 06:57:15,503 INFO L482 AbstractCegarLoop]: Interpolant automaton has 63 states. [2020-12-23 06:57:15,503 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 87 transitions. [2020-12-23 06:57:15,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-12-23 06:57:15,503 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:57:15,504 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:57:15,704 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:57:15,704 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:57:15,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:57:15,705 INFO L82 PathProgramCache]: Analyzing trace with hash -1789015095, now seen corresponding path program 38 times [2020-12-23 06:57:15,706 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:57:15,706 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859180367] [2020-12-23 06:57:15,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:57:15,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:57:19,593 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 477 proven. 284 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:57:19,593 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859180367] [2020-12-23 06:57:19,593 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [955299948] [2020-12-23 06:57:19,594 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:57:19,684 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 06:57:19,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:57:19,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 85 conjunts are in the unsatisfiable core [2020-12-23 06:57:19,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:57:22,694 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:57:22,695 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 06:57:22,696 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 06:57:22,814 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 0 proven. 761 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:57:22,814 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:57:22,814 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 44] total 67 [2020-12-23 06:57:22,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878675588] [2020-12-23 06:57:22,814 INFO L461 AbstractCegarLoop]: Interpolant automaton has 67 states [2020-12-23 06:57:22,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:57:22,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2020-12-23 06:57:22,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=3924, Unknown=0, NotChecked=0, Total=4422 [2020-12-23 06:57:22,815 INFO L87 Difference]: Start difference. First operand 86 states and 87 transitions. Second operand 67 states. [2020-12-23 06:57:27,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:57:27,891 INFO L93 Difference]: Finished difference Result 153 states and 156 transitions. [2020-12-23 06:57:27,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-12-23 06:57:27,893 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 85 [2020-12-23 06:57:27,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:57:27,894 INFO L225 Difference]: With dead ends: 153 [2020-12-23 06:57:27,894 INFO L226 Difference]: Without dead ends: 87 [2020-12-23 06:57:27,895 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1001 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=815, Invalid=6841, Unknown=0, NotChecked=0, Total=7656 [2020-12-23 06:57:27,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-12-23 06:57:27,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2020-12-23 06:57:27,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-12-23 06:57:27,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 88 transitions. [2020-12-23 06:57:27,911 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 88 transitions. Word has length 85 [2020-12-23 06:57:27,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:57:27,911 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 88 transitions. [2020-12-23 06:57:27,911 INFO L482 AbstractCegarLoop]: Interpolant automaton has 67 states. [2020-12-23 06:57:27,911 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 88 transitions. [2020-12-23 06:57:27,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-12-23 06:57:27,912 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:57:27,912 INFO L422 BasicCegarLoop]: trace histogram [21, 20, 19, 19, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:57:28,125 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2020-12-23 06:57:28,126 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:57:28,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:57:28,127 INFO L82 PathProgramCache]: Analyzing trace with hash 2037642513, now seen corresponding path program 39 times [2020-12-23 06:57:28,127 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:57:28,127 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491385471] [2020-12-23 06:57:28,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:57:28,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:57:29,596 INFO L134 CoverageAnalysis]: Checked inductivity of 782 backedges. 190 proven. 592 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:57:29,596 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491385471] [2020-12-23 06:57:29,597 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1529168131] [2020-12-23 06:57:29,597 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 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:57:29,712 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 20 check-sat command(s) [2020-12-23 06:57:29,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:57:29,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 66 conjunts are in the unsatisfiable core [2020-12-23 06:57:29,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:57:31,860 INFO L134 CoverageAnalysis]: Checked inductivity of 782 backedges. 0 proven. 782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:57:31,860 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:57:31,860 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 66 [2020-12-23 06:57:31,861 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095517277] [2020-12-23 06:57:31,861 INFO L461 AbstractCegarLoop]: Interpolant automaton has 66 states [2020-12-23 06:57:31,861 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:57:31,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2020-12-23 06:57:31,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=721, Invalid=3569, Unknown=0, NotChecked=0, Total=4290 [2020-12-23 06:57:31,862 INFO L87 Difference]: Start difference. First operand 87 states and 88 transitions. Second operand 66 states. [2020-12-23 06:57:35,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:57:35,279 INFO L93 Difference]: Finished difference Result 94 states and 95 transitions. [2020-12-23 06:57:35,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-12-23 06:57:35,280 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 86 [2020-12-23 06:57:35,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:57:35,281 INFO L225 Difference]: With dead ends: 94 [2020-12-23 06:57:35,281 INFO L226 Difference]: Without dead ends: 92 [2020-12-23 06:57:35,282 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2629 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=1910, Invalid=9220, Unknown=0, NotChecked=0, Total=11130 [2020-12-23 06:57:35,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-12-23 06:57:35,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 90. [2020-12-23 06:57:35,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-12-23 06:57:35,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 91 transitions. [2020-12-23 06:57:35,299 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 91 transitions. Word has length 86 [2020-12-23 06:57:35,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:57:35,299 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 91 transitions. [2020-12-23 06:57:35,299 INFO L482 AbstractCegarLoop]: Interpolant automaton has 66 states. [2020-12-23 06:57:35,299 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 91 transitions. [2020-12-23 06:57:35,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-12-23 06:57:35,300 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:57:35,300 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:57:35,507 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:57:35,507 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:57:35,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:57:35,508 INFO L82 PathProgramCache]: Analyzing trace with hash -1654831635, now seen corresponding path program 40 times [2020-12-23 06:57:35,508 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:57:35,508 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945450190] [2020-12-23 06:57:35,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:57:35,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:57:40,180 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 532 proven. 309 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:57:40,181 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945450190] [2020-12-23 06:57:40,181 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1412070631] [2020-12-23 06:57:40,181 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 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:57:40,277 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 06:57:40,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:57:40,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 89 conjunts are in the unsatisfiable core [2020-12-23 06:57:40,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:57:43,946 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:57:43,948 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 06:57:43,949 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 06:57:44,084 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:57:44,085 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:57:44,085 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 46] total 70 [2020-12-23 06:57:44,085 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336940250] [2020-12-23 06:57:44,085 INFO L461 AbstractCegarLoop]: Interpolant automaton has 70 states [2020-12-23 06:57:44,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:57:44,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2020-12-23 06:57:44,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=543, Invalid=4287, Unknown=0, NotChecked=0, Total=4830 [2020-12-23 06:57:44,086 INFO L87 Difference]: Start difference. First operand 90 states and 91 transitions. Second operand 70 states. [2020-12-23 06:57:49,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:57:49,491 INFO L93 Difference]: Finished difference Result 160 states and 163 transitions. [2020-12-23 06:57:49,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-12-23 06:57:49,492 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 89 [2020-12-23 06:57:49,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:57:49,493 INFO L225 Difference]: With dead ends: 160 [2020-12-23 06:57:49,494 INFO L226 Difference]: Without dead ends: 91 [2020-12-23 06:57:49,494 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 66 SyntacticMatches, 1 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1093 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=886, Invalid=7486, Unknown=0, NotChecked=0, Total=8372 [2020-12-23 06:57:49,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-12-23 06:57:49,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2020-12-23 06:57:49,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-12-23 06:57:49,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 92 transitions. [2020-12-23 06:57:49,512 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 92 transitions. Word has length 89 [2020-12-23 06:57:49,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:57:49,512 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 92 transitions. [2020-12-23 06:57:49,512 INFO L482 AbstractCegarLoop]: Interpolant automaton has 70 states. [2020-12-23 06:57:49,512 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 92 transitions. [2020-12-23 06:57:49,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-12-23 06:57:49,513 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:57:49,513 INFO L422 BasicCegarLoop]: trace histogram [22, 21, 20, 20, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:57:49,715 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:57:49,716 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:57:49,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:57:49,717 INFO L82 PathProgramCache]: Analyzing trace with hash -869430475, now seen corresponding path program 41 times [2020-12-23 06:57:49,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:57:49,717 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088357608] [2020-12-23 06:57:49,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:57:49,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:57:51,672 INFO L134 CoverageAnalysis]: Checked inductivity of 863 backedges. 210 proven. 653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:57:51,672 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088357608] [2020-12-23 06:57:51,673 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1024141393] [2020-12-23 06:57:51,673 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:57:51,796 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 21 check-sat command(s) [2020-12-23 06:57:51,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:57:51,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 69 conjunts are in the unsatisfiable core [2020-12-23 06:57:51,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:57:54,501 INFO L134 CoverageAnalysis]: Checked inductivity of 863 backedges. 0 proven. 863 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:57:54,502 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:57:54,502 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 69 [2020-12-23 06:57:54,502 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760326485] [2020-12-23 06:57:54,502 INFO L461 AbstractCegarLoop]: Interpolant automaton has 69 states [2020-12-23 06:57:54,502 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:57:54,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2020-12-23 06:57:54,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=788, Invalid=3904, Unknown=0, NotChecked=0, Total=4692 [2020-12-23 06:57:54,504 INFO L87 Difference]: Start difference. First operand 91 states and 92 transitions. Second operand 69 states. [2020-12-23 06:57:58,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:57:58,516 INFO L93 Difference]: Finished difference Result 98 states and 99 transitions. [2020-12-23 06:57:58,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-12-23 06:57:58,517 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 90 [2020-12-23 06:57:58,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:57:58,518 INFO L225 Difference]: With dead ends: 98 [2020-12-23 06:57:58,518 INFO L226 Difference]: Without dead ends: 96 [2020-12-23 06:57:58,519 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 67 SyntacticMatches, 1 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2897 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=2089, Invalid=10121, Unknown=0, NotChecked=0, Total=12210 [2020-12-23 06:57:58,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-12-23 06:57:58,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 94. [2020-12-23 06:57:58,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-12-23 06:57:58,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 95 transitions. [2020-12-23 06:57:58,540 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 95 transitions. Word has length 90 [2020-12-23 06:57:58,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:57:58,541 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 95 transitions. [2020-12-23 06:57:58,541 INFO L482 AbstractCegarLoop]: Interpolant automaton has 69 states. [2020-12-23 06:57:58,541 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 95 transitions. [2020-12-23 06:57:58,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-12-23 06:57:58,541 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:57:58,541 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:57:58,756 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2020-12-23 06:57:58,757 INFO L429 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:57:58,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:57:58,757 INFO L82 PathProgramCache]: Analyzing trace with hash 1749306697, now seen corresponding path program 42 times [2020-12-23 06:57:58,758 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:57:58,758 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088525053] [2020-12-23 06:57:58,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:57:58,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:58:04,174 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 590 proven. 335 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:58:04,175 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088525053] [2020-12-23 06:58:04,175 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1647114895] [2020-12-23 06:58:04,175 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 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:58:04,296 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2020-12-23 06:58:04,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:58:04,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 84 conjunts are in the unsatisfiable core [2020-12-23 06:58:04,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:58:13,170 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-23 06:58:13,172 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 06:58:13,370 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 0 proven. 925 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:58:13,370 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:58:13,370 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 50] total 97 [2020-12-23 06:58:13,370 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101002991] [2020-12-23 06:58:13,376 INFO L461 AbstractCegarLoop]: Interpolant automaton has 97 states [2020-12-23 06:58:13,376 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:58:13,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2020-12-23 06:58:13,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=901, Invalid=8411, Unknown=0, NotChecked=0, Total=9312 [2020-12-23 06:58:13,378 INFO L87 Difference]: Start difference. First operand 94 states and 95 transitions. Second operand 97 states. [2020-12-23 06:58:22,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:58:22,061 INFO L93 Difference]: Finished difference Result 167 states and 170 transitions. [2020-12-23 06:58:22,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2020-12-23 06:58:22,063 INFO L78 Accepts]: Start accepts. Automaton has 97 states. Word has length 93 [2020-12-23 06:58:22,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:58:22,064 INFO L225 Difference]: With dead ends: 167 [2020-12-23 06:58:22,064 INFO L226 Difference]: Without dead ends: 95 [2020-12-23 06:58:22,066 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4196 ImplicationChecksByTransitivity, 18.2s TimeCoverageRelationStatistics Valid=1643, Invalid=19237, Unknown=0, NotChecked=0, Total=20880 [2020-12-23 06:58:22,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-12-23 06:58:22,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2020-12-23 06:58:22,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-12-23 06:58:22,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 96 transitions. [2020-12-23 06:58:22,094 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 96 transitions. Word has length 93 [2020-12-23 06:58:22,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:58:22,094 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 96 transitions. [2020-12-23 06:58:22,094 INFO L482 AbstractCegarLoop]: Interpolant automaton has 97 states. [2020-12-23 06:58:22,094 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 96 transitions. [2020-12-23 06:58:22,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-12-23 06:58:22,095 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:58:22,095 INFO L422 BasicCegarLoop]: trace histogram [23, 22, 21, 21, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:58:22,295 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2020-12-23 06:58:22,296 INFO L429 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:58:22,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:58:22,297 INFO L82 PathProgramCache]: Analyzing trace with hash 2137042577, now seen corresponding path program 43 times [2020-12-23 06:58:22,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:58:22,297 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174888373] [2020-12-23 06:58:22,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:58:22,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:58:24,617 INFO L134 CoverageAnalysis]: Checked inductivity of 948 backedges. 231 proven. 717 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:58:24,617 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174888373] [2020-12-23 06:58:24,617 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1517002605] [2020-12-23 06:58:24,617 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 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:58:24,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:58:24,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 72 conjunts are in the unsatisfiable core [2020-12-23 06:58:24,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:58:27,895 INFO L134 CoverageAnalysis]: Checked inductivity of 948 backedges. 0 proven. 948 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:58:27,895 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:58:27,895 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 72 [2020-12-23 06:58:27,895 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698355852] [2020-12-23 06:58:27,896 INFO L461 AbstractCegarLoop]: Interpolant automaton has 72 states [2020-12-23 06:58:27,896 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:58:27,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2020-12-23 06:58:27,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=858, Invalid=4254, Unknown=0, NotChecked=0, Total=5112 [2020-12-23 06:58:27,896 INFO L87 Difference]: Start difference. First operand 95 states and 96 transitions. Second operand 72 states. [2020-12-23 06:58:32,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:58:32,655 INFO L93 Difference]: Finished difference Result 102 states and 103 transitions. [2020-12-23 06:58:32,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-12-23 06:58:32,656 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 94 [2020-12-23 06:58:32,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:58:32,657 INFO L225 Difference]: With dead ends: 102 [2020-12-23 06:58:32,657 INFO L226 Difference]: Without dead ends: 100 [2020-12-23 06:58:32,658 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3178 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=2276, Invalid=11064, Unknown=0, NotChecked=0, Total=13340 [2020-12-23 06:58:32,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-12-23 06:58:32,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 98. [2020-12-23 06:58:32,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-12-23 06:58:32,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 99 transitions. [2020-12-23 06:58:32,679 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 99 transitions. Word has length 94 [2020-12-23 06:58:32,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:58:32,679 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 99 transitions. [2020-12-23 06:58:32,679 INFO L482 AbstractCegarLoop]: Interpolant automaton has 72 states. [2020-12-23 06:58:32,679 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 99 transitions. [2020-12-23 06:58:32,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-12-23 06:58:32,680 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:58:32,680 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 22, 22, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:58:32,887 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2020-12-23 06:58:32,888 INFO L429 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:58:32,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:58:32,889 INFO L82 PathProgramCache]: Analyzing trace with hash 340008045, now seen corresponding path program 44 times [2020-12-23 06:58:32,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:58:32,889 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123673072] [2020-12-23 06:58:32,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:58:32,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:58:39,641 INFO L134 CoverageAnalysis]: Checked inductivity of 1013 backedges. 651 proven. 362 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:58:39,641 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123673072] [2020-12-23 06:58:39,641 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1907190423] [2020-12-23 06:58:39,641 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 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:58:39,740 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 06:58:39,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:58:39,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 380 conjuncts, 97 conjunts are in the unsatisfiable core [2020-12-23 06:58:39,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:58:44,851 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:58:44,852 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 06:58:44,854 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 06:58:45,046 INFO L134 CoverageAnalysis]: Checked inductivity of 1013 backedges. 0 proven. 1013 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:58:45,046 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:58:45,046 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 50] total 76 [2020-12-23 06:58:45,047 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752175076] [2020-12-23 06:58:45,047 INFO L461 AbstractCegarLoop]: Interpolant automaton has 76 states [2020-12-23 06:58:45,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:58:45,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2020-12-23 06:58:45,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=639, Invalid=5061, Unknown=0, NotChecked=0, Total=5700 [2020-12-23 06:58:45,048 INFO L87 Difference]: Start difference. First operand 98 states and 99 transitions. Second operand 76 states. [2020-12-23 06:58:53,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:58:53,540 INFO L93 Difference]: Finished difference Result 174 states and 177 transitions. [2020-12-23 06:58:53,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-12-23 06:58:53,543 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 97 [2020-12-23 06:58:53,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:58:53,544 INFO L225 Difference]: With dead ends: 174 [2020-12-23 06:58:53,544 INFO L226 Difference]: Without dead ends: 99 [2020-12-23 06:58:53,545 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 72 SyntacticMatches, 1 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1289 ImplicationChecksByTransitivity, 13.5s TimeCoverageRelationStatistics Valid=1037, Invalid=8863, Unknown=0, NotChecked=0, Total=9900 [2020-12-23 06:58:53,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-12-23 06:58:53,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2020-12-23 06:58:53,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-12-23 06:58:53,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 100 transitions. [2020-12-23 06:58:53,565 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 100 transitions. Word has length 97 [2020-12-23 06:58:53,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:58:53,565 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 100 transitions. [2020-12-23 06:58:53,565 INFO L482 AbstractCegarLoop]: Interpolant automaton has 76 states. [2020-12-23 06:58:53,565 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 100 transitions. [2020-12-23 06:58:53,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-12-23 06:58:53,566 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:58:53,566 INFO L422 BasicCegarLoop]: trace histogram [24, 23, 22, 22, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:58:53,766 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:58:53,767 INFO L429 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:58:53,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:58:53,768 INFO L82 PathProgramCache]: Analyzing trace with hash -1740727883, now seen corresponding path program 45 times [2020-12-23 06:58:53,768 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:58:53,768 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76238082] [2020-12-23 06:58:53,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:58:53,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat