/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/loops-crafted-1/mono-crafted_9.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-06 17:03:42,977 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 17:03:42,981 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 17:03:43,039 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-06 17:03:43,039 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-06 17:03:43,044 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-06 17:03:43,048 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-06 17:03:43,054 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-06 17:03:43,064 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-06 17:03:43,065 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-06 17:03:43,070 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-06 17:03:43,071 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-06 17:03:43,071 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-06 17:03:43,080 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-06 17:03:43,082 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-06 17:03:43,083 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-06 17:03:43,085 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-06 17:03:43,090 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-06 17:03:43,092 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-06 17:03:43,095 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-06 17:03:43,098 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-06 17:03:43,103 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-06 17:03:43,105 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-06 17:03:43,107 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-06 17:03:43,112 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-01-06 17:03:43,121 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-01-06 17:03:43,121 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-01-06 17:03:43,123 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-01-06 17:03:43,125 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-01-06 17:03:43,126 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-01-06 17:03:43,126 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-01-06 17:03:43,127 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-01-06 17:03:43,127 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-01-06 17:03:43,127 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 17:03:43,128 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 17:03:43,129 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 17:03:43,130 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-01-06 17:03:43,180 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 17:03:43,180 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 17:03:43,185 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 17:03:43,185 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 17:03:43,185 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 17:03:43,185 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 17:03:43,186 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 17:03:43,186 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 17:03:43,186 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 17:03:43,186 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 17:03:43,187 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 17:03:43,188 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 17:03:43,188 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 17:03:43,188 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 17:03:43,188 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 17:03:43,189 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 17:03:43,189 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 17:03:43,189 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 17:03:43,189 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 17:03:43,189 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 17:03:43,190 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 17:03:43,190 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 17:03:43,190 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 17:03:43,190 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 17:03:43,190 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 17:03:43,190 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 17:03:43,585 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 17:03:43,613 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 17:03:43,617 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 17:03:43,618 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 17:03:43,619 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 17:03:43,620 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops-crafted-1/mono-crafted_9.c [2021-01-06 17:03:43,719 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/e6475c636/e941043a72c24ba99557fc61c98d633a/FLAGa1ca7987e [2021-01-06 17:03:44,359 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 17:03:44,359 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/loops-crafted-1/mono-crafted_9.c [2021-01-06 17:03:44,367 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/e6475c636/e941043a72c24ba99557fc61c98d633a/FLAGa1ca7987e [2021-01-06 17:03:44,711 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/e6475c636/e941043a72c24ba99557fc61c98d633a [2021-01-06 17:03:44,720 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 17:03:44,722 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 17:03:44,724 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 17:03:44,724 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 17:03:44,727 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 17:03:44,728 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 05:03:44" (1/1) ... [2021-01-06 17:03:44,730 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1ef1e470 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:03:44, skipping insertion in model container [2021-01-06 17:03:44,730 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 05:03:44" (1/1) ... [2021-01-06 17:03:44,738 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 17:03:44,753 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-01-06 17:03:44,890 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/loops-crafted-1/mono-crafted_9.c[318,331] left hand side expression in assignment: lhs: VariableLHS[~x~0,] left hand side expression in assignment: lhs: VariableLHS[~x~0,] left hand side expression in assignment: lhs: VariableLHS[~y~0,] [2021-01-06 17:03:44,903 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 17:03:44,914 INFO L203 MainTranslator]: Completed pre-run [2021-01-06 17:03:44,929 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/loops-crafted-1/mono-crafted_9.c[318,331] left hand side expression in assignment: lhs: VariableLHS[~x~0,] left hand side expression in assignment: lhs: VariableLHS[~x~0,] left hand side expression in assignment: lhs: VariableLHS[~y~0,] [2021-01-06 17:03:44,933 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 17:03:44,949 INFO L208 MainTranslator]: Completed translation [2021-01-06 17:03:44,950 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:03:44 WrapperNode [2021-01-06 17:03:44,950 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 17:03:44,951 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 17:03:44,952 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 17:03:44,952 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 17:03:44,961 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:03:44" (1/1) ... [2021-01-06 17:03:44,969 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:03:44" (1/1) ... [2021-01-06 17:03:44,988 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 17:03:44,989 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 17:03:44,989 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 17:03:44,989 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 17:03:44,998 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:03:44" (1/1) ... [2021-01-06 17:03:44,999 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:03:44" (1/1) ... [2021-01-06 17:03:45,000 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:03:44" (1/1) ... [2021-01-06 17:03:45,000 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:03:44" (1/1) ... [2021-01-06 17:03:45,004 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:03:44" (1/1) ... [2021-01-06 17:03:45,008 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:03:44" (1/1) ... [2021-01-06 17:03:45,010 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:03:44" (1/1) ... [2021-01-06 17:03:45,011 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 17:03:45,012 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 17:03:45,012 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 17:03:45,012 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 17:03:45,013 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:03:44" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 17:03:45,122 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 17:03:45,123 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 17:03:45,123 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 17:03:45,123 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 17:03:45,383 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 17:03:45,383 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-01-06 17:03:45,385 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 05:03:45 BoogieIcfgContainer [2021-01-06 17:03:45,385 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 17:03:45,387 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 17:03:45,387 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 17:03:45,391 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 17:03:45,391 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 05:03:44" (1/3) ... [2021-01-06 17:03:45,392 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d905724 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 05:03:45, skipping insertion in model container [2021-01-06 17:03:45,392 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:03:44" (2/3) ... [2021-01-06 17:03:45,393 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d905724 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 05:03:45, skipping insertion in model container [2021-01-06 17:03:45,393 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 05:03:45" (3/3) ... [2021-01-06 17:03:45,395 INFO L111 eAbstractionObserver]: Analyzing ICFG mono-crafted_9.c [2021-01-06 17:03:45,402 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 17:03:45,407 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-01-06 17:03:45,429 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-01-06 17:03:45,459 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 17:03:45,459 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 17:03:45,459 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 17:03:45,459 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 17:03:45,459 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 17:03:45,460 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 17:03:45,460 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 17:03:45,460 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 17:03:45,476 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states. [2021-01-06 17:03:45,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-01-06 17:03:45,482 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:03:45,483 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-01-06 17:03:45,483 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:03:45,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:03:45,490 INFO L82 PathProgramCache]: Analyzing trace with hash 889937703, now seen corresponding path program 1 times [2021-01-06 17:03:45,502 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:03:45,503 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768293295] [2021-01-06 17:03:45,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:03:45,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:03:45,706 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:03:45,707 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768293295] [2021-01-06 17:03:45,708 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 17:03:45,708 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-01-06 17:03:45,709 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438328618] [2021-01-06 17:03:45,714 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-01-06 17:03:45,715 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:03:45,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-01-06 17:03:45,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-01-06 17:03:45,735 INFO L87 Difference]: Start difference. First operand 12 states. Second operand 2 states. [2021-01-06 17:03:45,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:03:45,751 INFO L93 Difference]: Finished difference Result 20 states and 23 transitions. [2021-01-06 17:03:45,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-01-06 17:03:45,753 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 6 [2021-01-06 17:03:45,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:03:45,762 INFO L225 Difference]: With dead ends: 20 [2021-01-06 17:03:45,763 INFO L226 Difference]: Without dead ends: 8 [2021-01-06 17:03:45,766 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-01-06 17:03:45,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2021-01-06 17:03:45,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2021-01-06 17:03:45,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-01-06 17:03:45,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 9 transitions. [2021-01-06 17:03:45,804 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 9 transitions. Word has length 6 [2021-01-06 17:03:45,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:03:45,805 INFO L481 AbstractCegarLoop]: Abstraction has 8 states and 9 transitions. [2021-01-06 17:03:45,805 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2021-01-06 17:03:45,805 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 9 transitions. [2021-01-06 17:03:45,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-01-06 17:03:45,806 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:03:45,806 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-01-06 17:03:45,806 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-06 17:03:45,806 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:03:45,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:03:45,807 INFO L82 PathProgramCache]: Analyzing trace with hash 889639793, now seen corresponding path program 1 times [2021-01-06 17:03:45,808 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:03:45,808 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52690575] [2021-01-06 17:03:45,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:03:45,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:03:45,901 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:03:45,901 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52690575] [2021-01-06 17:03:45,902 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 17:03:45,902 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 17:03:45,903 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133429572] [2021-01-06 17:03:45,904 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 17:03:45,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:03:45,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 17:03:45,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 17:03:45,906 INFO L87 Difference]: Start difference. First operand 8 states and 9 transitions. Second operand 3 states. [2021-01-06 17:03:45,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:03:45,984 INFO L93 Difference]: Finished difference Result 16 states and 20 transitions. [2021-01-06 17:03:45,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 17:03:45,987 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 6 [2021-01-06 17:03:45,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:03:45,991 INFO L225 Difference]: With dead ends: 16 [2021-01-06 17:03:45,992 INFO L226 Difference]: Without dead ends: 10 [2021-01-06 17:03:45,993 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 17:03:45,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2021-01-06 17:03:46,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2021-01-06 17:03:46,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-01-06 17:03:46,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2021-01-06 17:03:46,002 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 6 [2021-01-06 17:03:46,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:03:46,003 INFO L481 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2021-01-06 17:03:46,003 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 17:03:46,006 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2021-01-06 17:03:46,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-01-06 17:03:46,007 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:03:46,007 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:03:46,008 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-01-06 17:03:46,008 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:03:46,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:03:46,011 INFO L82 PathProgramCache]: Analyzing trace with hash 295691924, now seen corresponding path program 1 times [2021-01-06 17:03:46,011 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:03:46,012 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174040335] [2021-01-06 17:03:46,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:03:46,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:03:46,117 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:03:46,117 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174040335] [2021-01-06 17:03:46,118 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [854990235] [2021-01-06 17:03:46,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:03:46,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:03:46,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 3 conjunts are in the unsatisfiable core [2021-01-06 17:03:46,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:03:46,338 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:03:46,339 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:03:46,339 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-01-06 17:03:46,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352802337] [2021-01-06 17:03:46,340 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 17:03:46,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:03:46,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 17:03:46,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-01-06 17:03:46,342 INFO L87 Difference]: Start difference. First operand 10 states and 11 transitions. Second operand 5 states. [2021-01-06 17:03:46,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:03:46,392 INFO L93 Difference]: Finished difference Result 18 states and 22 transitions. [2021-01-06 17:03:46,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-06 17:03:46,394 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2021-01-06 17:03:46,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:03:46,394 INFO L225 Difference]: With dead ends: 18 [2021-01-06 17:03:46,395 INFO L226 Difference]: Without dead ends: 12 [2021-01-06 17:03:46,395 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-01-06 17:03:46,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2021-01-06 17:03:46,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2021-01-06 17:03:46,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2021-01-06 17:03:46,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2021-01-06 17:03:46,399 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 8 [2021-01-06 17:03:46,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:03:46,399 INFO L481 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2021-01-06 17:03:46,400 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 17:03:46,400 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2021-01-06 17:03:46,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-01-06 17:03:46,400 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:03:46,401 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2021-01-06 17:03:46,615 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-01-06 17:03:46,616 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:03:46,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:03:46,618 INFO L82 PathProgramCache]: Analyzing trace with hash 742440183, now seen corresponding path program 2 times [2021-01-06 17:03:46,619 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:03:46,619 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690082212] [2021-01-06 17:03:46,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:03:46,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:03:46,670 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-01-06 17:03:46,671 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690082212] [2021-01-06 17:03:46,671 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 17:03:46,671 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 17:03:46,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834058675] [2021-01-06 17:03:46,672 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 17:03:46,672 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:03:46,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 17:03:46,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 17:03:46,674 INFO L87 Difference]: Start difference. First operand 12 states and 13 transitions. Second operand 3 states. [2021-01-06 17:03:46,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:03:46,698 INFO L93 Difference]: Finished difference Result 18 states and 20 transitions. [2021-01-06 17:03:46,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 17:03:46,699 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2021-01-06 17:03:46,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:03:46,700 INFO L225 Difference]: With dead ends: 18 [2021-01-06 17:03:46,700 INFO L226 Difference]: Without dead ends: 14 [2021-01-06 17:03:46,701 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 17:03:46,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2021-01-06 17:03:46,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 13. [2021-01-06 17:03:46,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2021-01-06 17:03:46,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2021-01-06 17:03:46,704 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 10 [2021-01-06 17:03:46,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:03:46,705 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2021-01-06 17:03:46,705 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 17:03:46,705 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2021-01-06 17:03:46,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-01-06 17:03:46,705 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:03:46,706 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:03:46,706 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-01-06 17:03:46,706 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:03:46,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:03:46,707 INFO L82 PathProgramCache]: Analyzing trace with hash 572634524, now seen corresponding path program 1 times [2021-01-06 17:03:46,707 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:03:46,707 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080004948] [2021-01-06 17:03:46,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:03:46,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:03:46,769 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:03:46,770 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080004948] [2021-01-06 17:03:46,770 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [994482477] [2021-01-06 17:03:46,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:03:46,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:03:46,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 4 conjunts are in the unsatisfiable core [2021-01-06 17:03:46,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:03:46,877 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:03:46,877 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:03:46,877 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-01-06 17:03:46,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051292711] [2021-01-06 17:03:46,878 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-06 17:03:46,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:03:46,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-06 17:03:46,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-01-06 17:03:46,882 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand 6 states. [2021-01-06 17:03:46,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:03:46,926 INFO L93 Difference]: Finished difference Result 22 states and 25 transitions. [2021-01-06 17:03:46,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 17:03:46,927 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 12 [2021-01-06 17:03:46,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:03:46,927 INFO L225 Difference]: With dead ends: 22 [2021-01-06 17:03:46,928 INFO L226 Difference]: Without dead ends: 15 [2021-01-06 17:03:46,928 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-01-06 17:03:46,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-01-06 17:03:46,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2021-01-06 17:03:46,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2021-01-06 17:03:46,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2021-01-06 17:03:46,932 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 12 [2021-01-06 17:03:46,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:03:46,933 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2021-01-06 17:03:46,933 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-06 17:03:46,933 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2021-01-06 17:03:46,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 17:03:46,934 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:03:46,934 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:03:47,147 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:03:47,148 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:03:47,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:03:47,150 INFO L82 PathProgramCache]: Analyzing trace with hash -1176853889, now seen corresponding path program 2 times [2021-01-06 17:03:47,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:03:47,151 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333875619] [2021-01-06 17:03:47,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:03:47,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:03:47,255 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:03:47,255 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333875619] [2021-01-06 17:03:47,256 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1282444515] [2021-01-06 17:03:47,256 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 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:03:47,322 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 17:03:47,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:03:47,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 5 conjunts are in the unsatisfiable core [2021-01-06 17:03:47,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:03:47,376 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:03:47,377 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:03:47,377 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-01-06 17:03:47,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868711025] [2021-01-06 17:03:47,378 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-06 17:03:47,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:03:47,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-06 17:03:47,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-01-06 17:03:47,380 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 7 states. [2021-01-06 17:03:47,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:03:47,430 INFO L93 Difference]: Finished difference Result 24 states and 27 transitions. [2021-01-06 17:03:47,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 17:03:47,432 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 14 [2021-01-06 17:03:47,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:03:47,434 INFO L225 Difference]: With dead ends: 24 [2021-01-06 17:03:47,434 INFO L226 Difference]: Without dead ends: 17 [2021-01-06 17:03:47,435 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-01-06 17:03:47,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-01-06 17:03:47,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-01-06 17:03:47,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2021-01-06 17:03:47,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2021-01-06 17:03:47,452 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 14 [2021-01-06 17:03:47,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:03:47,452 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2021-01-06 17:03:47,453 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-06 17:03:47,453 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2021-01-06 17:03:47,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-01-06 17:03:47,453 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:03:47,453 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:03:47,658 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:03:47,659 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:03:47,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:03:47,660 INFO L82 PathProgramCache]: Analyzing trace with hash 1191961250, now seen corresponding path program 3 times [2021-01-06 17:03:47,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:03:47,662 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475611739] [2021-01-06 17:03:47,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:03:47,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:03:47,762 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:03:47,763 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475611739] [2021-01-06 17:03:47,763 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [659622286] [2021-01-06 17:03:47,763 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:03:47,827 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-01-06 17:03:47,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:03:47,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 4 conjunts are in the unsatisfiable core [2021-01-06 17:03:47,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:03:47,941 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-01-06 17:03:47,943 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:03:47,944 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4] total 9 [2021-01-06 17:03:47,944 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270239274] [2021-01-06 17:03:47,944 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-01-06 17:03:47,945 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:03:47,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-01-06 17:03:47,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-01-06 17:03:47,949 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 9 states. [2021-01-06 17:03:48,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:03:48,049 INFO L93 Difference]: Finished difference Result 29 states and 35 transitions. [2021-01-06 17:03:48,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 17:03:48,050 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 16 [2021-01-06 17:03:48,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:03:48,053 INFO L225 Difference]: With dead ends: 29 [2021-01-06 17:03:48,053 INFO L226 Difference]: Without dead ends: 22 [2021-01-06 17:03:48,059 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-01-06 17:03:48,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-01-06 17:03:48,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2021-01-06 17:03:48,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2021-01-06 17:03:48,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2021-01-06 17:03:48,075 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 16 [2021-01-06 17:03:48,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:03:48,075 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2021-01-06 17:03:48,075 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-01-06 17:03:48,075 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2021-01-06 17:03:48,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-01-06 17:03:48,076 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:03:48,077 INFO L422 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1, 1, 1, 1] [2021-01-06 17:03:48,291 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:03:48,292 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:03:48,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:03:48,293 INFO L82 PathProgramCache]: Analyzing trace with hash -885484758, now seen corresponding path program 4 times [2021-01-06 17:03:48,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:03:48,294 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159647770] [2021-01-06 17:03:48,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:03:48,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:03:48,421 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 18 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 17:03:48,424 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159647770] [2021-01-06 17:03:48,424 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [680581025] [2021-01-06 17:03:48,424 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:03:48,482 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 17:03:48,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:03:48,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 7 conjunts are in the unsatisfiable core [2021-01-06 17:03:48,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:03:48,551 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 18 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 17:03:48,551 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:03:48,552 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-01-06 17:03:48,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256979525] [2021-01-06 17:03:48,552 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-01-06 17:03:48,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:03:48,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-01-06 17:03:48,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-01-06 17:03:48,554 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand 9 states. [2021-01-06 17:03:48,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:03:48,618 INFO L93 Difference]: Finished difference Result 32 states and 37 transitions. [2021-01-06 17:03:48,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-06 17:03:48,619 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 20 [2021-01-06 17:03:48,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:03:48,619 INFO L225 Difference]: With dead ends: 32 [2021-01-06 17:03:48,620 INFO L226 Difference]: Without dead ends: 23 [2021-01-06 17:03:48,620 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-01-06 17:03:48,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-01-06 17:03:48,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2021-01-06 17:03:48,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2021-01-06 17:03:48,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2021-01-06 17:03:48,624 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 20 [2021-01-06 17:03:48,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:03:48,625 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2021-01-06 17:03:48,625 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-01-06 17:03:48,625 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2021-01-06 17:03:48,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-01-06 17:03:48,626 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:03:48,626 INFO L422 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1, 1, 1, 1] [2021-01-06 17:03:48,839 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:03:48,840 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:03:48,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:03:48,841 INFO L82 PathProgramCache]: Analyzing trace with hash -1175196403, now seen corresponding path program 5 times [2021-01-06 17:03:48,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:03:48,842 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050658752] [2021-01-06 17:03:48,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:03:48,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:03:48,948 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 21 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 17:03:48,949 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050658752] [2021-01-06 17:03:48,949 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [751879527] [2021-01-06 17:03:48,949 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:03:49,014 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-01-06 17:03:49,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:03:49,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-01-06 17:03:49,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:03:49,079 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 21 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 17:03:49,079 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:03:49,079 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-01-06 17:03:49,080 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785367092] [2021-01-06 17:03:49,080 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-01-06 17:03:49,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:03:49,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-01-06 17:03:49,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-01-06 17:03:49,081 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand 10 states. [2021-01-06 17:03:49,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:03:49,150 INFO L93 Difference]: Finished difference Result 34 states and 39 transitions. [2021-01-06 17:03:49,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 17:03:49,151 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 22 [2021-01-06 17:03:49,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:03:49,151 INFO L225 Difference]: With dead ends: 34 [2021-01-06 17:03:49,151 INFO L226 Difference]: Without dead ends: 25 [2021-01-06 17:03:49,152 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-01-06 17:03:49,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-01-06 17:03:49,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2021-01-06 17:03:49,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2021-01-06 17:03:49,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2021-01-06 17:03:49,156 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 22 [2021-01-06 17:03:49,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:03:49,157 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2021-01-06 17:03:49,157 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-01-06 17:03:49,157 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2021-01-06 17:03:49,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-01-06 17:03:49,158 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:03:49,158 INFO L422 BasicCegarLoop]: trace histogram [9, 7, 2, 1, 1, 1, 1, 1, 1] [2021-01-06 17:03:49,372 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:03:49,373 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:03:49,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:03:49,374 INFO L82 PathProgramCache]: Analyzing trace with hash -415213008, now seen corresponding path program 6 times [2021-01-06 17:03:49,375 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:03:49,375 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281986454] [2021-01-06 17:03:49,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:03:49,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:03:49,526 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 24 proven. 56 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 17:03:49,527 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281986454] [2021-01-06 17:03:49,527 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1867254299] [2021-01-06 17:03:49,527 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:03:49,597 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-01-06 17:03:49,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:03:49,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 17:03:49,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:03:49,727 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:03:49,727 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:03:49,728 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 13 [2021-01-06 17:03:49,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102687888] [2021-01-06 17:03:49,728 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-06 17:03:49,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:03:49,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-06 17:03:49,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-01-06 17:03:49,730 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 13 states. [2021-01-06 17:03:49,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:03:49,815 INFO L93 Difference]: Finished difference Result 40 states and 47 transitions. [2021-01-06 17:03:49,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 17:03:49,816 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 24 [2021-01-06 17:03:49,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:03:49,817 INFO L225 Difference]: With dead ends: 40 [2021-01-06 17:03:49,817 INFO L226 Difference]: Without dead ends: 31 [2021-01-06 17:03:49,818 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-01-06 17:03:49,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-01-06 17:03:49,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2021-01-06 17:03:49,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2021-01-06 17:03:49,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2021-01-06 17:03:49,823 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 24 [2021-01-06 17:03:49,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:03:49,823 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2021-01-06 17:03:49,823 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-01-06 17:03:49,823 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2021-01-06 17:03:49,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-01-06 17:03:49,824 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:03:49,824 INFO L422 BasicCegarLoop]: trace histogram [12, 10, 2, 1, 1, 1, 1, 1, 1] [2021-01-06 17:03:50,026 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-01-06 17:03:50,027 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:03:50,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:03:50,028 INFO L82 PathProgramCache]: Analyzing trace with hash -480119527, now seen corresponding path program 7 times [2021-01-06 17:03:50,028 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:03:50,029 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276010929] [2021-01-06 17:03:50,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:03:50,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:03:50,193 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 33 proven. 110 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 17:03:50,194 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276010929] [2021-01-06 17:03:50,199 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1107191975] [2021-01-06 17:03:50,199 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:03:50,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:03:50,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-06 17:03:50,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:03:50,320 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 33 proven. 110 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 17:03:50,321 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:03:50,321 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-01-06 17:03:50,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409371265] [2021-01-06 17:03:50,322 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-06 17:03:50,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:03:50,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-06 17:03:50,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2021-01-06 17:03:50,323 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand 14 states. [2021-01-06 17:03:50,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:03:50,385 INFO L93 Difference]: Finished difference Result 42 states and 47 transitions. [2021-01-06 17:03:50,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-01-06 17:03:50,385 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 30 [2021-01-06 17:03:50,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:03:50,386 INFO L225 Difference]: With dead ends: 42 [2021-01-06 17:03:50,386 INFO L226 Difference]: Without dead ends: 33 [2021-01-06 17:03:50,387 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2021-01-06 17:03:50,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-01-06 17:03:50,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-01-06 17:03:50,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2021-01-06 17:03:50,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2021-01-06 17:03:50,392 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 30 [2021-01-06 17:03:50,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:03:50,393 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2021-01-06 17:03:50,393 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2021-01-06 17:03:50,393 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2021-01-06 17:03:50,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-01-06 17:03:50,394 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:03:50,394 INFO L422 BasicCegarLoop]: trace histogram [13, 11, 2, 1, 1, 1, 1, 1, 1] [2021-01-06 17:03:50,608 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-01-06 17:03:50,609 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:03:50,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:03:50,610 INFO L82 PathProgramCache]: Analyzing trace with hash 1833733948, now seen corresponding path program 8 times [2021-01-06 17:03:50,610 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:03:50,611 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683171207] [2021-01-06 17:03:50,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:03:50,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:03:50,762 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 36 proven. 132 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 17:03:50,762 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683171207] [2021-01-06 17:03:50,763 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1165445529] [2021-01-06 17:03:50,763 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:03:50,814 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 17:03:50,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:03:50,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 17:03:50,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:03:50,891 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 36 proven. 132 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 17:03:50,891 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:03:50,891 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-01-06 17:03:50,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215907426] [2021-01-06 17:03:50,892 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-01-06 17:03:50,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:03:50,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-01-06 17:03:50,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2021-01-06 17:03:50,893 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand 15 states. [2021-01-06 17:03:50,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:03:50,960 INFO L93 Difference]: Finished difference Result 44 states and 49 transitions. [2021-01-06 17:03:50,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-01-06 17:03:50,960 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 32 [2021-01-06 17:03:50,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:03:50,961 INFO L225 Difference]: With dead ends: 44 [2021-01-06 17:03:50,961 INFO L226 Difference]: Without dead ends: 35 [2021-01-06 17:03:50,962 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2021-01-06 17:03:50,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-01-06 17:03:50,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-01-06 17:03:50,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2021-01-06 17:03:50,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2021-01-06 17:03:50,967 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 32 [2021-01-06 17:03:50,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:03:50,967 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2021-01-06 17:03:50,968 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2021-01-06 17:03:50,968 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2021-01-06 17:03:50,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-01-06 17:03:50,969 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:03:50,969 INFO L422 BasicCegarLoop]: trace histogram [14, 12, 2, 1, 1, 1, 1, 1, 1] [2021-01-06 17:03:51,182 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:03:51,183 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:03:51,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:03:51,184 INFO L82 PathProgramCache]: Analyzing trace with hash 653864095, now seen corresponding path program 9 times [2021-01-06 17:03:51,184 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:03:51,185 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99680309] [2021-01-06 17:03:51,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:03:51,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:03:51,387 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 39 proven. 156 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 17:03:51,388 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99680309] [2021-01-06 17:03:51,388 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1938392014] [2021-01-06 17:03:51,388 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:03:51,438 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-01-06 17:03:51,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:03:51,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2021-01-06 17:03:51,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:03:51,536 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 60 proven. 4 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2021-01-06 17:03:51,536 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:03:51,537 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 5] total 18 [2021-01-06 17:03:51,537 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887896330] [2021-01-06 17:03:51,539 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-06 17:03:51,539 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:03:51,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-06 17:03:51,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2021-01-06 17:03:51,541 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand 18 states. [2021-01-06 17:03:51,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:03:51,633 INFO L93 Difference]: Finished difference Result 49 states and 57 transitions. [2021-01-06 17:03:51,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-01-06 17:03:51,633 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 34 [2021-01-06 17:03:51,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:03:51,634 INFO L225 Difference]: With dead ends: 49 [2021-01-06 17:03:51,634 INFO L226 Difference]: Without dead ends: 40 [2021-01-06 17:03:51,635 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2021-01-06 17:03:51,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-01-06 17:03:51,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2021-01-06 17:03:51,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2021-01-06 17:03:51,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 42 transitions. [2021-01-06 17:03:51,655 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 42 transitions. Word has length 34 [2021-01-06 17:03:51,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:03:51,655 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 42 transitions. [2021-01-06 17:03:51,655 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2021-01-06 17:03:51,655 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 42 transitions. [2021-01-06 17:03:51,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-01-06 17:03:51,659 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:03:51,659 INFO L422 BasicCegarLoop]: trace histogram [16, 13, 3, 1, 1, 1, 1, 1, 1] [2021-01-06 17:03:51,876 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:03:51,877 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:03:51,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:03:51,878 INFO L82 PathProgramCache]: Analyzing trace with hash -33157337, now seen corresponding path program 10 times [2021-01-06 17:03:51,878 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:03:51,879 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102977064] [2021-01-06 17:03:51,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:03:51,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:03:52,074 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 70 proven. 182 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-01-06 17:03:52,075 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102977064] [2021-01-06 17:03:52,075 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [279778585] [2021-01-06 17:03:52,075 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:03:52,126 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 17:03:52,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:03:52,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-06 17:03:52,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:03:52,209 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 70 proven. 182 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-01-06 17:03:52,209 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:03:52,209 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-01-06 17:03:52,209 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031935075] [2021-01-06 17:03:52,211 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 17:03:52,211 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:03:52,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 17:03:52,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2021-01-06 17:03:52,212 INFO L87 Difference]: Start difference. First operand 39 states and 42 transitions. Second operand 17 states. [2021-01-06 17:03:52,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:03:52,284 INFO L93 Difference]: Finished difference Result 52 states and 59 transitions. [2021-01-06 17:03:52,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-01-06 17:03:52,285 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 38 [2021-01-06 17:03:52,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:03:52,286 INFO L225 Difference]: With dead ends: 52 [2021-01-06 17:03:52,286 INFO L226 Difference]: Without dead ends: 41 [2021-01-06 17:03:52,286 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2021-01-06 17:03:52,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-01-06 17:03:52,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2021-01-06 17:03:52,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2021-01-06 17:03:52,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 44 transitions. [2021-01-06 17:03:52,295 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 44 transitions. Word has length 38 [2021-01-06 17:03:52,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:03:52,295 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 44 transitions. [2021-01-06 17:03:52,295 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 17:03:52,295 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 44 transitions. [2021-01-06 17:03:52,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-01-06 17:03:52,296 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:03:52,296 INFO L422 BasicCegarLoop]: trace histogram [17, 14, 3, 1, 1, 1, 1, 1, 1] [2021-01-06 17:03:52,504 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-01-06 17:03:52,505 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:03:52,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:03:52,505 INFO L82 PathProgramCache]: Analyzing trace with hash 1846662730, now seen corresponding path program 11 times [2021-01-06 17:03:52,506 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:03:52,506 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594508421] [2021-01-06 17:03:52,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:03:52,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:03:52,696 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 75 proven. 210 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-01-06 17:03:52,697 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594508421] [2021-01-06 17:03:52,697 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [877508531] [2021-01-06 17:03:52,697 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:03:52,754 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2021-01-06 17:03:52,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:03:52,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 16 conjunts are in the unsatisfiable core [2021-01-06 17:03:52,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:03:52,830 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 75 proven. 210 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-01-06 17:03:52,831 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:03:52,831 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-01-06 17:03:52,831 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378746872] [2021-01-06 17:03:52,832 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-06 17:03:52,832 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:03:52,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-06 17:03:52,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2021-01-06 17:03:52,833 INFO L87 Difference]: Start difference. First operand 41 states and 44 transitions. Second operand 18 states. [2021-01-06 17:03:52,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:03:52,904 INFO L93 Difference]: Finished difference Result 54 states and 61 transitions. [2021-01-06 17:03:52,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-01-06 17:03:52,905 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 40 [2021-01-06 17:03:52,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:03:52,906 INFO L225 Difference]: With dead ends: 54 [2021-01-06 17:03:52,906 INFO L226 Difference]: Without dead ends: 43 [2021-01-06 17:03:52,909 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2021-01-06 17:03:52,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-01-06 17:03:52,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2021-01-06 17:03:52,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2021-01-06 17:03:52,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 46 transitions. [2021-01-06 17:03:52,921 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 46 transitions. Word has length 40 [2021-01-06 17:03:52,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:03:52,922 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 46 transitions. [2021-01-06 17:03:52,922 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2021-01-06 17:03:52,922 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 46 transitions. [2021-01-06 17:03:52,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-01-06 17:03:52,923 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:03:52,923 INFO L422 BasicCegarLoop]: trace histogram [18, 15, 3, 1, 1, 1, 1, 1, 1] [2021-01-06 17:03:53,137 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-01-06 17:03:53,138 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:03:53,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:03:53,139 INFO L82 PathProgramCache]: Analyzing trace with hash 172515501, now seen corresponding path program 12 times [2021-01-06 17:03:53,139 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:03:53,139 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545163307] [2021-01-06 17:03:53,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:03:53,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:03:53,339 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 80 proven. 240 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-01-06 17:03:53,339 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545163307] [2021-01-06 17:03:53,339 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [489773474] [2021-01-06 17:03:53,339 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:03:53,399 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2021-01-06 17:03:53,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:03:53,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 6 conjunts are in the unsatisfiable core [2021-01-06 17:03:53,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:03:53,540 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 105 proven. 9 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2021-01-06 17:03:53,541 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:03:53,541 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 6] total 22 [2021-01-06 17:03:53,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873811894] [2021-01-06 17:03:53,544 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-01-06 17:03:53,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:03:53,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-01-06 17:03:53,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2021-01-06 17:03:53,546 INFO L87 Difference]: Start difference. First operand 43 states and 46 transitions. Second operand 22 states. [2021-01-06 17:03:53,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:03:53,655 INFO L93 Difference]: Finished difference Result 59 states and 69 transitions. [2021-01-06 17:03:53,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-01-06 17:03:53,656 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 42 [2021-01-06 17:03:53,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:03:53,657 INFO L225 Difference]: With dead ends: 59 [2021-01-06 17:03:53,657 INFO L226 Difference]: Without dead ends: 48 [2021-01-06 17:03:53,658 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2021-01-06 17:03:53,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-01-06 17:03:53,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2021-01-06 17:03:53,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2021-01-06 17:03:53,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2021-01-06 17:03:53,662 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 42 [2021-01-06 17:03:53,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:03:53,663 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2021-01-06 17:03:53,663 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2021-01-06 17:03:53,663 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2021-01-06 17:03:53,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-01-06 17:03:53,664 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:03:53,664 INFO L422 BasicCegarLoop]: trace histogram [20, 16, 4, 1, 1, 1, 1, 1, 1] [2021-01-06 17:03:53,877 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-01-06 17:03:53,878 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:03:53,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:03:53,879 INFO L82 PathProgramCache]: Analyzing trace with hash -870062923, now seen corresponding path program 13 times [2021-01-06 17:03:53,879 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:03:53,879 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357704739] [2021-01-06 17:03:53,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:03:53,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:03:54,116 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 119 proven. 272 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-01-06 17:03:54,117 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357704739] [2021-01-06 17:03:54,117 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [991635610] [2021-01-06 17:03:54,117 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:03:54,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:03:54,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 18 conjunts are in the unsatisfiable core [2021-01-06 17:03:54,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:03:54,249 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 119 proven. 272 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-01-06 17:03:54,249 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:03:54,249 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2021-01-06 17:03:54,250 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914716869] [2021-01-06 17:03:54,250 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-01-06 17:03:54,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:03:54,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-01-06 17:03:54,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2021-01-06 17:03:54,251 INFO L87 Difference]: Start difference. First operand 47 states and 51 transitions. Second operand 20 states. [2021-01-06 17:03:54,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:03:54,307 INFO L93 Difference]: Finished difference Result 62 states and 71 transitions. [2021-01-06 17:03:54,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-01-06 17:03:54,307 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 46 [2021-01-06 17:03:54,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:03:54,308 INFO L225 Difference]: With dead ends: 62 [2021-01-06 17:03:54,308 INFO L226 Difference]: Without dead ends: 49 [2021-01-06 17:03:54,309 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2021-01-06 17:03:54,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-01-06 17:03:54,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2021-01-06 17:03:54,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2021-01-06 17:03:54,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 53 transitions. [2021-01-06 17:03:54,313 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 53 transitions. Word has length 46 [2021-01-06 17:03:54,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:03:54,313 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 53 transitions. [2021-01-06 17:03:54,314 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2021-01-06 17:03:54,314 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 53 transitions. [2021-01-06 17:03:54,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-01-06 17:03:54,314 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:03:54,315 INFO L422 BasicCegarLoop]: trace histogram [21, 17, 4, 1, 1, 1, 1, 1, 1] [2021-01-06 17:03:54,527 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:03:54,528 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:03:54,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:03:54,528 INFO L82 PathProgramCache]: Analyzing trace with hash 2027149528, now seen corresponding path program 14 times [2021-01-06 17:03:54,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:03:54,529 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332703906] [2021-01-06 17:03:54,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:03:54,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:03:54,789 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 126 proven. 306 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-01-06 17:03:54,790 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332703906] [2021-01-06 17:03:54,790 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1421907808] [2021-01-06 17:03:54,790 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:03:54,845 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 17:03:54,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:03:54,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 19 conjunts are in the unsatisfiable core [2021-01-06 17:03:54,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:03:54,916 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 126 proven. 306 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-01-06 17:03:54,916 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:03:54,916 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2021-01-06 17:03:54,916 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463626858] [2021-01-06 17:03:54,917 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-06 17:03:54,917 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:03:54,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-06 17:03:54,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2021-01-06 17:03:54,918 INFO L87 Difference]: Start difference. First operand 49 states and 53 transitions. Second operand 21 states. [2021-01-06 17:03:54,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:03:54,997 INFO L93 Difference]: Finished difference Result 64 states and 73 transitions. [2021-01-06 17:03:54,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-01-06 17:03:54,998 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 48 [2021-01-06 17:03:54,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:03:54,998 INFO L225 Difference]: With dead ends: 64 [2021-01-06 17:03:54,999 INFO L226 Difference]: Without dead ends: 51 [2021-01-06 17:03:54,999 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2021-01-06 17:03:54,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-01-06 17:03:55,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2021-01-06 17:03:55,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2021-01-06 17:03:55,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 55 transitions. [2021-01-06 17:03:55,003 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 55 transitions. Word has length 48 [2021-01-06 17:03:55,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:03:55,004 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 55 transitions. [2021-01-06 17:03:55,004 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2021-01-06 17:03:55,004 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 55 transitions. [2021-01-06 17:03:55,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-01-06 17:03:55,005 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:03:55,005 INFO L422 BasicCegarLoop]: trace histogram [22, 18, 4, 1, 1, 1, 1, 1, 1] [2021-01-06 17:03:55,219 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-01-06 17:03:55,220 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:03:55,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:03:55,221 INFO L82 PathProgramCache]: Analyzing trace with hash -1185460165, now seen corresponding path program 15 times [2021-01-06 17:03:55,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:03:55,221 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597044407] [2021-01-06 17:03:55,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:03:55,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:03:55,519 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 133 proven. 342 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-01-06 17:03:55,520 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597044407] [2021-01-06 17:03:55,520 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [525311810] [2021-01-06 17:03:55,520 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:03:55,572 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-01-06 17:03:55,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:03:55,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 7 conjunts are in the unsatisfiable core [2021-01-06 17:03:55,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:03:55,749 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 162 proven. 16 refuted. 0 times theorem prover too weak. 306 trivial. 0 not checked. [2021-01-06 17:03:55,749 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:03:55,749 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 7] total 26 [2021-01-06 17:03:55,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041957516] [2021-01-06 17:03:55,750 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-01-06 17:03:55,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:03:55,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-01-06 17:03:55,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2021-01-06 17:03:55,751 INFO L87 Difference]: Start difference. First operand 51 states and 55 transitions. Second operand 26 states. [2021-01-06 17:03:55,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:03:55,846 INFO L93 Difference]: Finished difference Result 69 states and 81 transitions. [2021-01-06 17:03:55,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-01-06 17:03:55,846 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 50 [2021-01-06 17:03:55,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:03:55,847 INFO L225 Difference]: With dead ends: 69 [2021-01-06 17:03:55,847 INFO L226 Difference]: Without dead ends: 56 [2021-01-06 17:03:55,848 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2021-01-06 17:03:55,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-01-06 17:03:55,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2021-01-06 17:03:55,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2021-01-06 17:03:55,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 60 transitions. [2021-01-06 17:03:55,852 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 60 transitions. Word has length 50 [2021-01-06 17:03:55,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:03:55,852 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 60 transitions. [2021-01-06 17:03:55,852 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2021-01-06 17:03:55,852 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 60 transitions. [2021-01-06 17:03:55,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-01-06 17:03:55,853 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:03:55,853 INFO L422 BasicCegarLoop]: trace histogram [24, 19, 5, 1, 1, 1, 1, 1, 1] [2021-01-06 17:03:56,062 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:03:56,063 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:03:56,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:03:56,064 INFO L82 PathProgramCache]: Analyzing trace with hash -1656515133, now seen corresponding path program 16 times [2021-01-06 17:03:56,064 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:03:56,064 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77775992] [2021-01-06 17:03:56,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:03:56,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:03:56,374 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 180 proven. 380 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-01-06 17:03:56,374 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77775992] [2021-01-06 17:03:56,374 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1647951970] [2021-01-06 17:03:56,374 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:03:56,420 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 17:03:56,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:03:56,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2021-01-06 17:03:56,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:03:56,520 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 180 proven. 380 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-01-06 17:03:56,521 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:03:56,521 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2021-01-06 17:03:56,521 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218266990] [2021-01-06 17:03:56,522 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-01-06 17:03:56,522 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:03:56,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-01-06 17:03:56,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2021-01-06 17:03:56,523 INFO L87 Difference]: Start difference. First operand 55 states and 60 transitions. Second operand 23 states. [2021-01-06 17:03:56,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:03:56,592 INFO L93 Difference]: Finished difference Result 72 states and 83 transitions. [2021-01-06 17:03:56,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-01-06 17:03:56,592 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 54 [2021-01-06 17:03:56,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:03:56,609 INFO L225 Difference]: With dead ends: 72 [2021-01-06 17:03:56,610 INFO L226 Difference]: Without dead ends: 57 [2021-01-06 17:03:56,611 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2021-01-06 17:03:56,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-01-06 17:03:56,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2021-01-06 17:03:56,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2021-01-06 17:03:56,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 62 transitions. [2021-01-06 17:03:56,620 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 62 transitions. Word has length 54 [2021-01-06 17:03:56,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:03:56,620 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 62 transitions. [2021-01-06 17:03:56,620 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2021-01-06 17:03:56,620 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 62 transitions. [2021-01-06 17:03:56,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-01-06 17:03:56,621 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:03:56,621 INFO L422 BasicCegarLoop]: trace histogram [25, 20, 5, 1, 1, 1, 1, 1, 1] [2021-01-06 17:03:56,835 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:03:56,836 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:03:56,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:03:56,836 INFO L82 PathProgramCache]: Analyzing trace with hash -1441089818, now seen corresponding path program 17 times [2021-01-06 17:03:56,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:03:56,837 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908028131] [2021-01-06 17:03:56,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:03:56,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:03:57,219 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 189 proven. 420 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-01-06 17:03:57,220 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908028131] [2021-01-06 17:03:57,220 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [752903344] [2021-01-06 17:03:57,220 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:03:57,274 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 26 check-sat command(s) [2021-01-06 17:03:57,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:03:57,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 22 conjunts are in the unsatisfiable core [2021-01-06 17:03:57,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:03:57,352 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 189 proven. 420 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-01-06 17:03:57,353 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:03:57,353 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2021-01-06 17:03:57,353 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307066441] [2021-01-06 17:03:57,356 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-01-06 17:03:57,356 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:03:57,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-01-06 17:03:57,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2021-01-06 17:03:57,357 INFO L87 Difference]: Start difference. First operand 57 states and 62 transitions. Second operand 24 states. [2021-01-06 17:03:57,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:03:57,447 INFO L93 Difference]: Finished difference Result 74 states and 85 transitions. [2021-01-06 17:03:57,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-01-06 17:03:57,448 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 56 [2021-01-06 17:03:57,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:03:57,449 INFO L225 Difference]: With dead ends: 74 [2021-01-06 17:03:57,449 INFO L226 Difference]: Without dead ends: 59 [2021-01-06 17:03:57,451 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2021-01-06 17:03:57,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-01-06 17:03:57,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2021-01-06 17:03:57,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2021-01-06 17:03:57,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 64 transitions. [2021-01-06 17:03:57,461 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 64 transitions. Word has length 56 [2021-01-06 17:03:57,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:03:57,461 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 64 transitions. [2021-01-06 17:03:57,462 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2021-01-06 17:03:57,462 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 64 transitions. [2021-01-06 17:03:57,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-06 17:03:57,462 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:03:57,462 INFO L422 BasicCegarLoop]: trace histogram [26, 21, 5, 1, 1, 1, 1, 1, 1] [2021-01-06 17:03:57,675 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-01-06 17:03:57,676 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:03:57,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:03:57,676 INFO L82 PathProgramCache]: Analyzing trace with hash -575792311, now seen corresponding path program 18 times [2021-01-06 17:03:57,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:03:57,677 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778642455] [2021-01-06 17:03:57,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:03:57,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:03:58,015 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 198 proven. 462 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-01-06 17:03:58,016 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778642455] [2021-01-06 17:03:58,016 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [116323039] [2021-01-06 17:03:58,016 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:03:58,095 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 23 check-sat command(s) [2021-01-06 17:03:58,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:03:58,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 8 conjunts are in the unsatisfiable core [2021-01-06 17:03:58,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:03:58,318 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 231 proven. 25 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2021-01-06 17:03:58,319 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:03:58,319 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 8] total 30 [2021-01-06 17:03:58,319 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400088621] [2021-01-06 17:03:58,319 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-01-06 17:03:58,320 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:03:58,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-01-06 17:03:58,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2021-01-06 17:03:58,321 INFO L87 Difference]: Start difference. First operand 59 states and 64 transitions. Second operand 30 states. [2021-01-06 17:03:58,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:03:58,456 INFO L93 Difference]: Finished difference Result 79 states and 93 transitions. [2021-01-06 17:03:58,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-01-06 17:03:58,457 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 58 [2021-01-06 17:03:58,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:03:58,457 INFO L225 Difference]: With dead ends: 79 [2021-01-06 17:03:58,457 INFO L226 Difference]: Without dead ends: 64 [2021-01-06 17:03:58,458 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2021-01-06 17:03:58,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-01-06 17:03:58,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2021-01-06 17:03:58,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2021-01-06 17:03:58,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 69 transitions. [2021-01-06 17:03:58,462 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 69 transitions. Word has length 58 [2021-01-06 17:03:58,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:03:58,462 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 69 transitions. [2021-01-06 17:03:58,462 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2021-01-06 17:03:58,462 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 69 transitions. [2021-01-06 17:03:58,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-01-06 17:03:58,463 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:03:58,463 INFO L422 BasicCegarLoop]: trace histogram [28, 22, 6, 1, 1, 1, 1, 1, 1] [2021-01-06 17:03:58,678 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:03:58,678 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:03:58,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:03:58,679 INFO L82 PathProgramCache]: Analyzing trace with hash -429571503, now seen corresponding path program 19 times [2021-01-06 17:03:58,679 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:03:58,679 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999310610] [2021-01-06 17:03:58,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:03:58,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:03:59,120 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 253 proven. 506 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-01-06 17:03:59,120 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999310610] [2021-01-06 17:03:59,120 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [153585804] [2021-01-06 17:03:59,120 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 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:03:59,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:03:59,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 24 conjunts are in the unsatisfiable core [2021-01-06 17:03:59,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:03:59,260 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 253 proven. 506 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-01-06 17:03:59,261 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:03:59,261 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2021-01-06 17:03:59,262 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467430069] [2021-01-06 17:03:59,262 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-01-06 17:03:59,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:03:59,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-01-06 17:03:59,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2021-01-06 17:03:59,263 INFO L87 Difference]: Start difference. First operand 63 states and 69 transitions. Second operand 26 states. [2021-01-06 17:03:59,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:03:59,369 INFO L93 Difference]: Finished difference Result 82 states and 95 transitions. [2021-01-06 17:03:59,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-01-06 17:03:59,369 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 62 [2021-01-06 17:03:59,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:03:59,370 INFO L225 Difference]: With dead ends: 82 [2021-01-06 17:03:59,370 INFO L226 Difference]: Without dead ends: 65 [2021-01-06 17:03:59,370 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2021-01-06 17:03:59,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-01-06 17:03:59,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2021-01-06 17:03:59,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2021-01-06 17:03:59,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 71 transitions. [2021-01-06 17:03:59,374 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 71 transitions. Word has length 62 [2021-01-06 17:03:59,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:03:59,374 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 71 transitions. [2021-01-06 17:03:59,374 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2021-01-06 17:03:59,374 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 71 transitions. [2021-01-06 17:03:59,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-01-06 17:03:59,375 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:03:59,375 INFO L422 BasicCegarLoop]: trace histogram [29, 23, 6, 1, 1, 1, 1, 1, 1] [2021-01-06 17:03:59,588 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-01-06 17:03:59,588 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:03:59,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:03:59,589 INFO L82 PathProgramCache]: Analyzing trace with hash 1139183732, now seen corresponding path program 20 times [2021-01-06 17:03:59,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:03:59,590 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025895273] [2021-01-06 17:03:59,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:03:59,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:04:00,014 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 264 proven. 552 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-01-06 17:04:00,015 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025895273] [2021-01-06 17:04:00,015 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1165337831] [2021-01-06 17:04:00,015 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:04:00,077 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 17:04:00,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:04:00,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 25 conjunts are in the unsatisfiable core [2021-01-06 17:04:00,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:04:00,166 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 264 proven. 552 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-01-06 17:04:00,166 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:04:00,166 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2021-01-06 17:04:00,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690796655] [2021-01-06 17:04:00,167 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-01-06 17:04:00,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:04:00,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-01-06 17:04:00,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2021-01-06 17:04:00,168 INFO L87 Difference]: Start difference. First operand 65 states and 71 transitions. Second operand 27 states. [2021-01-06 17:04:00,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:04:00,275 INFO L93 Difference]: Finished difference Result 84 states and 97 transitions. [2021-01-06 17:04:00,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-01-06 17:04:00,276 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 64 [2021-01-06 17:04:00,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:04:00,276 INFO L225 Difference]: With dead ends: 84 [2021-01-06 17:04:00,277 INFO L226 Difference]: Without dead ends: 67 [2021-01-06 17:04:00,277 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2021-01-06 17:04:00,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-01-06 17:04:00,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2021-01-06 17:04:00,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2021-01-06 17:04:00,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 73 transitions. [2021-01-06 17:04:00,281 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 73 transitions. Word has length 64 [2021-01-06 17:04:00,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:04:00,281 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 73 transitions. [2021-01-06 17:04:00,281 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2021-01-06 17:04:00,281 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 73 transitions. [2021-01-06 17:04:00,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-01-06 17:04:00,282 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:04:00,282 INFO L422 BasicCegarLoop]: trace histogram [30, 24, 6, 1, 1, 1, 1, 1, 1] [2021-01-06 17:04:00,495 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-01-06 17:04:00,496 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:04:00,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:04:00,496 INFO L82 PathProgramCache]: Analyzing trace with hash 1179443671, now seen corresponding path program 21 times [2021-01-06 17:04:00,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:04:00,497 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564219563] [2021-01-06 17:04:00,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:04:00,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:04:00,954 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 275 proven. 600 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-01-06 17:04:00,954 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564219563] [2021-01-06 17:04:00,955 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1808535055] [2021-01-06 17:04:00,955 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:04:01,010 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2021-01-06 17:04:01,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:04:01,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-06 17:04:01,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:04:01,278 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 312 proven. 36 refuted. 0 times theorem prover too weak. 552 trivial. 0 not checked. [2021-01-06 17:04:01,278 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:04:01,279 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 9] total 34 [2021-01-06 17:04:01,279 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837558712] [2021-01-06 17:04:01,279 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-01-06 17:04:01,279 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:04:01,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-01-06 17:04:01,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2021-01-06 17:04:01,281 INFO L87 Difference]: Start difference. First operand 67 states and 73 transitions. Second operand 34 states. [2021-01-06 17:04:01,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:04:01,447 INFO L93 Difference]: Finished difference Result 89 states and 105 transitions. [2021-01-06 17:04:01,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-01-06 17:04:01,450 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 66 [2021-01-06 17:04:01,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:04:01,451 INFO L225 Difference]: With dead ends: 89 [2021-01-06 17:04:01,451 INFO L226 Difference]: Without dead ends: 72 [2021-01-06 17:04:01,452 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2021-01-06 17:04:01,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-01-06 17:04:01,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 71. [2021-01-06 17:04:01,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2021-01-06 17:04:01,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 78 transitions. [2021-01-06 17:04:01,456 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 78 transitions. Word has length 66 [2021-01-06 17:04:01,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:04:01,456 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 78 transitions. [2021-01-06 17:04:01,456 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2021-01-06 17:04:01,456 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 78 transitions. [2021-01-06 17:04:01,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-01-06 17:04:01,457 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:04:01,457 INFO L422 BasicCegarLoop]: trace histogram [32, 25, 7, 1, 1, 1, 1, 1, 1] [2021-01-06 17:04:01,666 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:04:01,667 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:04:01,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:04:01,667 INFO L82 PathProgramCache]: Analyzing trace with hash -1006564769, now seen corresponding path program 22 times [2021-01-06 17:04:01,668 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:04:01,668 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182024299] [2021-01-06 17:04:01,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:04:01,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:04:02,136 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 338 proven. 650 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-01-06 17:04:02,137 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182024299] [2021-01-06 17:04:02,137 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1105867479] [2021-01-06 17:04:02,137 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:04:02,189 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 17:04:02,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:04:02,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 27 conjunts are in the unsatisfiable core [2021-01-06 17:04:02,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:04:02,291 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 338 proven. 650 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-01-06 17:04:02,292 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:04:02,292 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2021-01-06 17:04:02,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431188452] [2021-01-06 17:04:02,292 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-01-06 17:04:02,293 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:04:02,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-01-06 17:04:02,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2021-01-06 17:04:02,294 INFO L87 Difference]: Start difference. First operand 71 states and 78 transitions. Second operand 29 states. [2021-01-06 17:04:02,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:04:02,418 INFO L93 Difference]: Finished difference Result 92 states and 107 transitions. [2021-01-06 17:04:02,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-01-06 17:04:02,419 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 70 [2021-01-06 17:04:02,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:04:02,420 INFO L225 Difference]: With dead ends: 92 [2021-01-06 17:04:02,420 INFO L226 Difference]: Without dead ends: 73 [2021-01-06 17:04:02,420 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2021-01-06 17:04:02,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-01-06 17:04:02,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2021-01-06 17:04:02,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2021-01-06 17:04:02,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 80 transitions. [2021-01-06 17:04:02,425 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 80 transitions. Word has length 70 [2021-01-06 17:04:02,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:04:02,425 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 80 transitions. [2021-01-06 17:04:02,425 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2021-01-06 17:04:02,425 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 80 transitions. [2021-01-06 17:04:02,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-01-06 17:04:02,426 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:04:02,426 INFO L422 BasicCegarLoop]: trace histogram [33, 26, 7, 1, 1, 1, 1, 1, 1] [2021-01-06 17:04:02,634 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-01-06 17:04:02,635 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:04:02,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:04:02,636 INFO L82 PathProgramCache]: Analyzing trace with hash 800032130, now seen corresponding path program 23 times [2021-01-06 17:04:02,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:04:02,636 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145086737] [2021-01-06 17:04:02,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:04:02,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:04:03,127 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 351 proven. 702 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-01-06 17:04:03,128 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145086737] [2021-01-06 17:04:03,128 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [577269253] [2021-01-06 17:04:03,128 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 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:04:03,202 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 34 check-sat command(s) [2021-01-06 17:04:03,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:04:03,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 28 conjunts are in the unsatisfiable core [2021-01-06 17:04:03,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:04:03,341 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 351 proven. 702 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-01-06 17:04:03,342 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:04:03,342 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2021-01-06 17:04:03,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240654959] [2021-01-06 17:04:03,343 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-01-06 17:04:03,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:04:03,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-01-06 17:04:03,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2021-01-06 17:04:03,349 INFO L87 Difference]: Start difference. First operand 73 states and 80 transitions. Second operand 30 states. [2021-01-06 17:04:03,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:04:03,476 INFO L93 Difference]: Finished difference Result 94 states and 109 transitions. [2021-01-06 17:04:03,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-01-06 17:04:03,477 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 72 [2021-01-06 17:04:03,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:04:03,478 INFO L225 Difference]: With dead ends: 94 [2021-01-06 17:04:03,478 INFO L226 Difference]: Without dead ends: 75 [2021-01-06 17:04:03,478 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2021-01-06 17:04:03,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-01-06 17:04:03,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2021-01-06 17:04:03,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2021-01-06 17:04:03,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 82 transitions. [2021-01-06 17:04:03,482 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 82 transitions. Word has length 72 [2021-01-06 17:04:03,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:04:03,483 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 82 transitions. [2021-01-06 17:04:03,483 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2021-01-06 17:04:03,483 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 82 transitions. [2021-01-06 17:04:03,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-01-06 17:04:03,483 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:04:03,484 INFO L422 BasicCegarLoop]: trace histogram [34, 27, 7, 1, 1, 1, 1, 1, 1] [2021-01-06 17:04:03,696 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:04:03,697 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:04:03,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:04:03,698 INFO L82 PathProgramCache]: Analyzing trace with hash 1772864485, now seen corresponding path program 24 times [2021-01-06 17:04:03,698 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:04:03,698 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526830998] [2021-01-06 17:04:03,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:04:03,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:04:04,213 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 364 proven. 756 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-01-06 17:04:04,214 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526830998] [2021-01-06 17:04:04,214 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2097445382] [2021-01-06 17:04:04,214 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:04:04,306 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2021-01-06 17:04:04,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:04:04,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 17:04:04,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:04:04,712 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 405 proven. 49 refuted. 0 times theorem prover too weak. 702 trivial. 0 not checked. [2021-01-06 17:04:04,713 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:04:04,713 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 10] total 38 [2021-01-06 17:04:04,713 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703230362] [2021-01-06 17:04:04,713 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-01-06 17:04:04,714 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:04:04,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-01-06 17:04:04,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2021-01-06 17:04:04,715 INFO L87 Difference]: Start difference. First operand 75 states and 82 transitions. Second operand 38 states. [2021-01-06 17:04:04,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:04:04,896 INFO L93 Difference]: Finished difference Result 99 states and 117 transitions. [2021-01-06 17:04:04,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-01-06 17:04:04,896 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 74 [2021-01-06 17:04:04,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:04:04,897 INFO L225 Difference]: With dead ends: 99 [2021-01-06 17:04:04,898 INFO L226 Difference]: Without dead ends: 80 [2021-01-06 17:04:04,898 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2021-01-06 17:04:04,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-01-06 17:04:04,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 79. [2021-01-06 17:04:04,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2021-01-06 17:04:04,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 87 transitions. [2021-01-06 17:04:04,902 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 87 transitions. Word has length 74 [2021-01-06 17:04:04,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:04:04,903 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 87 transitions. [2021-01-06 17:04:04,903 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2021-01-06 17:04:04,903 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 87 transitions. [2021-01-06 17:04:04,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-01-06 17:04:04,903 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:04:04,903 INFO L422 BasicCegarLoop]: trace histogram [36, 28, 8, 1, 1, 1, 1, 1, 1] [2021-01-06 17:04:05,116 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-01-06 17:04:05,117 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:04:05,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:04:05,117 INFO L82 PathProgramCache]: Analyzing trace with hash -66646547, now seen corresponding path program 25 times [2021-01-06 17:04:05,118 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:04:05,118 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855144829] [2021-01-06 17:04:05,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:04:05,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:04:05,651 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 435 proven. 812 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-01-06 17:04:05,651 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855144829] [2021-01-06 17:04:05,651 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [857970915] [2021-01-06 17:04:05,651 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 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:04:05,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:04:05,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 30 conjunts are in the unsatisfiable core [2021-01-06 17:04:05,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:04:05,823 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 435 proven. 812 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-01-06 17:04:05,823 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:04:05,823 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2021-01-06 17:04:05,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341707953] [2021-01-06 17:04:05,824 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-01-06 17:04:05,824 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:04:05,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-01-06 17:04:05,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2021-01-06 17:04:05,825 INFO L87 Difference]: Start difference. First operand 79 states and 87 transitions. Second operand 32 states. [2021-01-06 17:04:05,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:04:05,957 INFO L93 Difference]: Finished difference Result 102 states and 119 transitions. [2021-01-06 17:04:05,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-01-06 17:04:05,957 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 78 [2021-01-06 17:04:05,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:04:05,958 INFO L225 Difference]: With dead ends: 102 [2021-01-06 17:04:05,958 INFO L226 Difference]: Without dead ends: 81 [2021-01-06 17:04:05,959 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2021-01-06 17:04:05,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-01-06 17:04:05,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2021-01-06 17:04:05,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2021-01-06 17:04:05,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 89 transitions. [2021-01-06 17:04:05,963 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 89 transitions. Word has length 78 [2021-01-06 17:04:05,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:04:05,963 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 89 transitions. [2021-01-06 17:04:05,963 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2021-01-06 17:04:05,963 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 89 transitions. [2021-01-06 17:04:05,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-01-06 17:04:05,964 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:04:05,964 INFO L422 BasicCegarLoop]: trace histogram [37, 29, 8, 1, 1, 1, 1, 1, 1] [2021-01-06 17:04:06,174 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-01-06 17:04:06,175 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:04:06,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:04:06,176 INFO L82 PathProgramCache]: Analyzing trace with hash 6665744, now seen corresponding path program 26 times [2021-01-06 17:04:06,176 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:04:06,177 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94428359] [2021-01-06 17:04:06,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:04:06,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:04:06,757 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 450 proven. 870 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-01-06 17:04:06,758 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94428359] [2021-01-06 17:04:06,758 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [375548754] [2021-01-06 17:04:06,758 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:04:06,847 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 17:04:06,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:04:06,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 31 conjunts are in the unsatisfiable core [2021-01-06 17:04:06,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:04:06,987 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 450 proven. 870 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-01-06 17:04:06,988 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:04:06,988 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2021-01-06 17:04:06,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814747813] [2021-01-06 17:04:06,989 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-01-06 17:04:06,989 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:04:06,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-01-06 17:04:06,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2021-01-06 17:04:06,990 INFO L87 Difference]: Start difference. First operand 81 states and 89 transitions. Second operand 33 states. [2021-01-06 17:04:07,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:04:07,130 INFO L93 Difference]: Finished difference Result 104 states and 121 transitions. [2021-01-06 17:04:07,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-01-06 17:04:07,131 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 80 [2021-01-06 17:04:07,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:04:07,131 INFO L225 Difference]: With dead ends: 104 [2021-01-06 17:04:07,132 INFO L226 Difference]: Without dead ends: 83 [2021-01-06 17:04:07,132 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2021-01-06 17:04:07,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-01-06 17:04:07,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2021-01-06 17:04:07,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2021-01-06 17:04:07,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 91 transitions. [2021-01-06 17:04:07,136 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 91 transitions. Word has length 80 [2021-01-06 17:04:07,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:04:07,137 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 91 transitions. [2021-01-06 17:04:07,137 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2021-01-06 17:04:07,137 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 91 transitions. [2021-01-06 17:04:07,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-01-06 17:04:07,138 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:04:07,138 INFO L422 BasicCegarLoop]: trace histogram [38, 30, 8, 1, 1, 1, 1, 1, 1] [2021-01-06 17:04:07,353 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:04:07,353 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:04:07,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:04:07,354 INFO L82 PathProgramCache]: Analyzing trace with hash 1740300659, now seen corresponding path program 27 times [2021-01-06 17:04:07,354 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:04:07,354 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988036953] [2021-01-06 17:04:07,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:04:07,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:04:08,005 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 465 proven. 930 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-01-06 17:04:08,006 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988036953] [2021-01-06 17:04:08,006 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1714266705] [2021-01-06 17:04:08,006 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:04:08,064 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2021-01-06 17:04:08,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:04:08,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 17:04:08,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:04:08,516 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 510 proven. 64 refuted. 0 times theorem prover too weak. 870 trivial. 0 not checked. [2021-01-06 17:04:08,517 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:04:08,517 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 11] total 42 [2021-01-06 17:04:08,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45859537] [2021-01-06 17:04:08,517 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-01-06 17:04:08,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:04:08,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-01-06 17:04:08,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2021-01-06 17:04:08,519 INFO L87 Difference]: Start difference. First operand 83 states and 91 transitions. Second operand 42 states. [2021-01-06 17:04:08,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:04:08,722 INFO L93 Difference]: Finished difference Result 109 states and 129 transitions. [2021-01-06 17:04:08,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-01-06 17:04:08,722 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 82 [2021-01-06 17:04:08,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:04:08,723 INFO L225 Difference]: With dead ends: 109 [2021-01-06 17:04:08,723 INFO L226 Difference]: Without dead ends: 88 [2021-01-06 17:04:08,724 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2021-01-06 17:04:08,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-01-06 17:04:08,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 87. [2021-01-06 17:04:08,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2021-01-06 17:04:08,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 96 transitions. [2021-01-06 17:04:08,729 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 96 transitions. Word has length 82 [2021-01-06 17:04:08,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:04:08,729 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 96 transitions. [2021-01-06 17:04:08,730 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2021-01-06 17:04:08,730 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 96 transitions. [2021-01-06 17:04:08,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-01-06 17:04:08,730 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:04:08,731 INFO L422 BasicCegarLoop]: trace histogram [40, 31, 9, 1, 1, 1, 1, 1, 1] [2021-01-06 17:04:08,943 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:04:08,944 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:04:08,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:04:08,944 INFO L82 PathProgramCache]: Analyzing trace with hash 2145348859, now seen corresponding path program 28 times [2021-01-06 17:04:08,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:04:08,945 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352533587] [2021-01-06 17:04:08,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:04:08,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:04:09,578 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 544 proven. 992 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-01-06 17:04:09,578 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352533587] [2021-01-06 17:04:09,578 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209359165] [2021-01-06 17:04:09,578 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 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:04:09,643 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 17:04:09,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:04:09,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 33 conjunts are in the unsatisfiable core [2021-01-06 17:04:09,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:04:09,754 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 544 proven. 992 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-01-06 17:04:09,755 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:04:09,755 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2021-01-06 17:04:09,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889260145] [2021-01-06 17:04:09,756 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-01-06 17:04:09,756 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:04:09,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-01-06 17:04:09,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2021-01-06 17:04:09,757 INFO L87 Difference]: Start difference. First operand 87 states and 96 transitions. Second operand 35 states. [2021-01-06 17:04:09,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:04:09,903 INFO L93 Difference]: Finished difference Result 112 states and 131 transitions. [2021-01-06 17:04:09,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-01-06 17:04:09,904 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 86 [2021-01-06 17:04:09,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:04:09,905 INFO L225 Difference]: With dead ends: 112 [2021-01-06 17:04:09,905 INFO L226 Difference]: Without dead ends: 89 [2021-01-06 17:04:09,905 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2021-01-06 17:04:09,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-01-06 17:04:09,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2021-01-06 17:04:09,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2021-01-06 17:04:09,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 98 transitions. [2021-01-06 17:04:09,910 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 98 transitions. Word has length 86 [2021-01-06 17:04:09,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:04:09,910 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 98 transitions. [2021-01-06 17:04:09,910 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2021-01-06 17:04:09,911 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 98 transitions. [2021-01-06 17:04:09,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-01-06 17:04:09,911 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:04:09,912 INFO L422 BasicCegarLoop]: trace histogram [41, 32, 9, 1, 1, 1, 1, 1, 1] [2021-01-06 17:04:10,126 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-01-06 17:04:10,126 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:04:10,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:04:10,127 INFO L82 PathProgramCache]: Analyzing trace with hash 1953579550, now seen corresponding path program 29 times [2021-01-06 17:04:10,128 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:04:10,128 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967496852] [2021-01-06 17:04:10,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:04:10,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:04:10,807 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 561 proven. 1056 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-01-06 17:04:10,807 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967496852] [2021-01-06 17:04:10,807 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1606931246] [2021-01-06 17:04:10,807 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:04:10,896 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 42 check-sat command(s) [2021-01-06 17:04:10,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:04:10,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 34 conjunts are in the unsatisfiable core [2021-01-06 17:04:10,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:04:11,029 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 561 proven. 1056 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-01-06 17:04:11,029 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:04:11,029 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2021-01-06 17:04:11,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943095568] [2021-01-06 17:04:11,030 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-01-06 17:04:11,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:04:11,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-01-06 17:04:11,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2021-01-06 17:04:11,032 INFO L87 Difference]: Start difference. First operand 89 states and 98 transitions. Second operand 36 states. [2021-01-06 17:04:11,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:04:11,185 INFO L93 Difference]: Finished difference Result 114 states and 133 transitions. [2021-01-06 17:04:11,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-01-06 17:04:11,185 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 88 [2021-01-06 17:04:11,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:04:11,188 INFO L225 Difference]: With dead ends: 114 [2021-01-06 17:04:11,188 INFO L226 Difference]: Without dead ends: 91 [2021-01-06 17:04:11,189 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2021-01-06 17:04:11,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-01-06 17:04:11,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2021-01-06 17:04:11,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2021-01-06 17:04:11,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 100 transitions. [2021-01-06 17:04:11,193 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 100 transitions. Word has length 88 [2021-01-06 17:04:11,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:04:11,194 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 100 transitions. [2021-01-06 17:04:11,194 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2021-01-06 17:04:11,194 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 100 transitions. [2021-01-06 17:04:11,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-01-06 17:04:11,195 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:04:11,195 INFO L422 BasicCegarLoop]: trace histogram [42, 33, 9, 1, 1, 1, 1, 1, 1] [2021-01-06 17:04:11,409 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:04:11,410 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:04:11,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:04:11,411 INFO L82 PathProgramCache]: Analyzing trace with hash -1948099967, now seen corresponding path program 30 times [2021-01-06 17:04:11,411 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:04:11,411 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797231099] [2021-01-06 17:04:11,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:04:11,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:04:12,235 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 578 proven. 1122 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-01-06 17:04:12,235 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797231099] [2021-01-06 17:04:12,235 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2075229663] [2021-01-06 17:04:12,235 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 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:04:12,339 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 39 check-sat command(s) [2021-01-06 17:04:12,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:04:12,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-06 17:04:12,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:04:12,827 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 627 proven. 81 refuted. 0 times theorem prover too weak. 1056 trivial. 0 not checked. [2021-01-06 17:04:12,828 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:04:12,828 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 12] total 46 [2021-01-06 17:04:12,828 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101231158] [2021-01-06 17:04:12,829 INFO L461 AbstractCegarLoop]: Interpolant automaton has 46 states [2021-01-06 17:04:12,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:04:12,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-01-06 17:04:12,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2021-01-06 17:04:12,831 INFO L87 Difference]: Start difference. First operand 91 states and 100 transitions. Second operand 46 states. [2021-01-06 17:04:13,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:04:13,053 INFO L93 Difference]: Finished difference Result 119 states and 141 transitions. [2021-01-06 17:04:13,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-01-06 17:04:13,053 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 90 [2021-01-06 17:04:13,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:04:13,054 INFO L225 Difference]: With dead ends: 119 [2021-01-06 17:04:13,054 INFO L226 Difference]: Without dead ends: 96 [2021-01-06 17:04:13,055 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2021-01-06 17:04:13,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-01-06 17:04:13,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 95. [2021-01-06 17:04:13,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2021-01-06 17:04:13,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 105 transitions. [2021-01-06 17:04:13,060 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 105 transitions. Word has length 90 [2021-01-06 17:04:13,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:04:13,060 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 105 transitions. [2021-01-06 17:04:13,060 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2021-01-06 17:04:13,060 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 105 transitions. [2021-01-06 17:04:13,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-01-06 17:04:13,061 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:04:13,061 INFO L422 BasicCegarLoop]: trace histogram [44, 34, 10, 1, 1, 1, 1, 1, 1] [2021-01-06 17:04:13,275 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-01-06 17:04:13,276 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:04:13,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:04:13,277 INFO L82 PathProgramCache]: Analyzing trace with hash 1852458889, now seen corresponding path program 31 times [2021-01-06 17:04:13,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:04:13,277 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228332003] [2021-01-06 17:04:13,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:04:13,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:04:14,071 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 665 proven. 1190 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-01-06 17:04:14,072 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228332003] [2021-01-06 17:04:14,072 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [773337978] [2021-01-06 17:04:14,072 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 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:04:14,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:04:14,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 36 conjunts are in the unsatisfiable core [2021-01-06 17:04:14,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:04:14,267 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 665 proven. 1190 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-01-06 17:04:14,268 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:04:14,268 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2021-01-06 17:04:14,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684486024] [2021-01-06 17:04:14,269 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-01-06 17:04:14,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:04:14,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-01-06 17:04:14,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2021-01-06 17:04:14,274 INFO L87 Difference]: Start difference. First operand 95 states and 105 transitions. Second operand 38 states. [2021-01-06 17:04:14,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:04:14,464 INFO L93 Difference]: Finished difference Result 122 states and 143 transitions. [2021-01-06 17:04:14,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-01-06 17:04:14,464 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 94 [2021-01-06 17:04:14,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:04:14,465 INFO L225 Difference]: With dead ends: 122 [2021-01-06 17:04:14,466 INFO L226 Difference]: Without dead ends: 97 [2021-01-06 17:04:14,466 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2021-01-06 17:04:14,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-01-06 17:04:14,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2021-01-06 17:04:14,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2021-01-06 17:04:14,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 107 transitions. [2021-01-06 17:04:14,471 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 107 transitions. Word has length 94 [2021-01-06 17:04:14,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:04:14,471 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 107 transitions. [2021-01-06 17:04:14,471 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2021-01-06 17:04:14,471 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 107 transitions. [2021-01-06 17:04:14,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-01-06 17:04:14,472 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:04:14,472 INFO L422 BasicCegarLoop]: trace histogram [45, 35, 10, 1, 1, 1, 1, 1, 1] [2021-01-06 17:04:14,685 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-01-06 17:04:14,686 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:04:14,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:04:14,686 INFO L82 PathProgramCache]: Analyzing trace with hash 2008172972, now seen corresponding path program 32 times [2021-01-06 17:04:14,687 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:04:14,687 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261067619] [2021-01-06 17:04:14,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:04:14,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:04:15,599 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 684 proven. 1260 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-01-06 17:04:15,599 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261067619] [2021-01-06 17:04:15,599 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [179459750] [2021-01-06 17:04:15,599 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 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:04:15,660 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 17:04:15,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:04:15,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 37 conjunts are in the unsatisfiable core [2021-01-06 17:04:15,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:04:15,779 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 684 proven. 1260 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-01-06 17:04:15,779 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:04:15,779 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 39 [2021-01-06 17:04:15,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230305737] [2021-01-06 17:04:15,780 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-01-06 17:04:15,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:04:15,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-01-06 17:04:15,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2021-01-06 17:04:15,783 INFO L87 Difference]: Start difference. First operand 97 states and 107 transitions. Second operand 39 states. [2021-01-06 17:04:15,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:04:15,971 INFO L93 Difference]: Finished difference Result 124 states and 145 transitions. [2021-01-06 17:04:15,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-01-06 17:04:15,972 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 96 [2021-01-06 17:04:15,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:04:15,973 INFO L225 Difference]: With dead ends: 124 [2021-01-06 17:04:15,973 INFO L226 Difference]: Without dead ends: 99 [2021-01-06 17:04:15,974 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2021-01-06 17:04:15,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-01-06 17:04:15,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2021-01-06 17:04:15,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2021-01-06 17:04:15,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 109 transitions. [2021-01-06 17:04:15,980 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 109 transitions. Word has length 96 [2021-01-06 17:04:15,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:04:15,980 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 109 transitions. [2021-01-06 17:04:15,980 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2021-01-06 17:04:15,981 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 109 transitions. [2021-01-06 17:04:15,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-01-06 17:04:15,981 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:04:15,982 INFO L422 BasicCegarLoop]: trace histogram [46, 36, 10, 1, 1, 1, 1, 1, 1] [2021-01-06 17:04:16,189 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-01-06 17:04:16,190 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:04:16,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:04:16,191 INFO L82 PathProgramCache]: Analyzing trace with hash 1325551375, now seen corresponding path program 33 times [2021-01-06 17:04:16,191 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:04:16,191 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960623310] [2021-01-06 17:04:16,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:04:16,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:04:17,051 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 703 proven. 1332 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-01-06 17:04:17,051 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960623310] [2021-01-06 17:04:17,051 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [850893804] [2021-01-06 17:04:17,051 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 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:04:17,123 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2021-01-06 17:04:17,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:04:17,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 17:04:17,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:04:17,742 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 756 proven. 100 refuted. 0 times theorem prover too weak. 1260 trivial. 0 not checked. [2021-01-06 17:04:17,743 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:04:17,743 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 13] total 50 [2021-01-06 17:04:17,743 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297422195] [2021-01-06 17:04:17,743 INFO L461 AbstractCegarLoop]: Interpolant automaton has 50 states [2021-01-06 17:04:17,743 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:04:17,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-01-06 17:04:17,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2021-01-06 17:04:17,745 INFO L87 Difference]: Start difference. First operand 99 states and 109 transitions. Second operand 50 states. [2021-01-06 17:04:18,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:04:18,018 INFO L93 Difference]: Finished difference Result 129 states and 153 transitions. [2021-01-06 17:04:18,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-01-06 17:04:18,018 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 98 [2021-01-06 17:04:18,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:04:18,019 INFO L225 Difference]: With dead ends: 129 [2021-01-06 17:04:18,019 INFO L226 Difference]: Without dead ends: 104 [2021-01-06 17:04:18,020 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2021-01-06 17:04:18,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-01-06 17:04:18,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 103. [2021-01-06 17:04:18,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2021-01-06 17:04:18,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 114 transitions. [2021-01-06 17:04:18,024 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 114 transitions. Word has length 98 [2021-01-06 17:04:18,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:04:18,025 INFO L481 AbstractCegarLoop]: Abstraction has 103 states and 114 transitions. [2021-01-06 17:04:18,025 INFO L482 AbstractCegarLoop]: Interpolant automaton has 50 states. [2021-01-06 17:04:18,025 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 114 transitions. [2021-01-06 17:04:18,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-01-06 17:04:18,026 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:04:18,026 INFO L422 BasicCegarLoop]: trace histogram [48, 37, 11, 1, 1, 1, 1, 1, 1] [2021-01-06 17:04:18,240 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-01-06 17:04:18,241 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:04:18,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:04:18,241 INFO L82 PathProgramCache]: Analyzing trace with hash -1778401897, now seen corresponding path program 34 times [2021-01-06 17:04:18,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:04:18,242 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293106095] [2021-01-06 17:04:18,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:04:18,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:04:19,204 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 798 proven. 1406 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-01-06 17:04:19,205 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293106095] [2021-01-06 17:04:19,205 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [286006239] [2021-01-06 17:04:19,205 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 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:04:19,270 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 17:04:19,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:04:19,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 39 conjunts are in the unsatisfiable core [2021-01-06 17:04:19,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:04:19,399 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 798 proven. 1406 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-01-06 17:04:19,400 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:04:19,400 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 41 [2021-01-06 17:04:19,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226990269] [2021-01-06 17:04:19,400 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-01-06 17:04:19,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:04:19,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-01-06 17:04:19,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2021-01-06 17:04:19,402 INFO L87 Difference]: Start difference. First operand 103 states and 114 transitions. Second operand 41 states. [2021-01-06 17:04:19,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:04:19,611 INFO L93 Difference]: Finished difference Result 132 states and 155 transitions. [2021-01-06 17:04:19,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-01-06 17:04:19,612 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 102 [2021-01-06 17:04:19,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:04:19,613 INFO L225 Difference]: With dead ends: 132 [2021-01-06 17:04:19,613 INFO L226 Difference]: Without dead ends: 105 [2021-01-06 17:04:19,614 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2021-01-06 17:04:19,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-01-06 17:04:19,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2021-01-06 17:04:19,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2021-01-06 17:04:19,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 116 transitions. [2021-01-06 17:04:19,618 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 116 transitions. Word has length 102 [2021-01-06 17:04:19,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:04:19,618 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 116 transitions. [2021-01-06 17:04:19,619 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2021-01-06 17:04:19,619 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 116 transitions. [2021-01-06 17:04:19,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-01-06 17:04:19,620 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:04:19,620 INFO L422 BasicCegarLoop]: trace histogram [49, 38, 11, 1, 1, 1, 1, 1, 1] [2021-01-06 17:04:19,834 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-01-06 17:04:19,835 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:04:19,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:04:19,835 INFO L82 PathProgramCache]: Analyzing trace with hash -1518277446, now seen corresponding path program 35 times [2021-01-06 17:04:19,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:04:19,836 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992307393] [2021-01-06 17:04:19,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:04:19,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:04:20,822 INFO L134 CoverageAnalysis]: Checked inductivity of 2401 backedges. 819 proven. 1482 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-01-06 17:04:20,822 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992307393] [2021-01-06 17:04:20,822 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606995479] [2021-01-06 17:04:20,822 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:04:20,916 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 50 check-sat command(s) [2021-01-06 17:04:20,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:04:20,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 40 conjunts are in the unsatisfiable core [2021-01-06 17:04:20,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:04:21,046 INFO L134 CoverageAnalysis]: Checked inductivity of 2401 backedges. 819 proven. 1482 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-01-06 17:04:21,046 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:04:21,046 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 42 [2021-01-06 17:04:21,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943395519] [2021-01-06 17:04:21,047 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-01-06 17:04:21,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:04:21,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-01-06 17:04:21,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2021-01-06 17:04:21,048 INFO L87 Difference]: Start difference. First operand 105 states and 116 transitions. Second operand 42 states. [2021-01-06 17:04:21,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:04:21,229 INFO L93 Difference]: Finished difference Result 134 states and 157 transitions. [2021-01-06 17:04:21,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-01-06 17:04:21,229 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 104 [2021-01-06 17:04:21,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:04:21,230 INFO L225 Difference]: With dead ends: 134 [2021-01-06 17:04:21,230 INFO L226 Difference]: Without dead ends: 107 [2021-01-06 17:04:21,231 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2021-01-06 17:04:21,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-01-06 17:04:21,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2021-01-06 17:04:21,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2021-01-06 17:04:21,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 118 transitions. [2021-01-06 17:04:21,236 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 118 transitions. Word has length 104 [2021-01-06 17:04:21,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:04:21,236 INFO L481 AbstractCegarLoop]: Abstraction has 107 states and 118 transitions. [2021-01-06 17:04:21,236 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2021-01-06 17:04:21,236 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 118 transitions. [2021-01-06 17:04:21,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-01-06 17:04:21,237 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:04:21,237 INFO L422 BasicCegarLoop]: trace histogram [50, 39, 11, 1, 1, 1, 1, 1, 1] [2021-01-06 17:04:21,450 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-01-06 17:04:21,451 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:04:21,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:04:21,452 INFO L82 PathProgramCache]: Analyzing trace with hash -646783203, now seen corresponding path program 36 times [2021-01-06 17:04:21,452 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:04:21,452 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960730164] [2021-01-06 17:04:21,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:04:21,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:04:22,559 INFO L134 CoverageAnalysis]: Checked inductivity of 2500 backedges. 840 proven. 1560 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-01-06 17:04:22,559 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960730164] [2021-01-06 17:04:22,559 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1780928390] [2021-01-06 17:04:22,560 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:04:22,669 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 47 check-sat command(s) [2021-01-06 17:04:22,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:04:22,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-06 17:04:22,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:04:23,513 INFO L134 CoverageAnalysis]: Checked inductivity of 2500 backedges. 897 proven. 121 refuted. 0 times theorem prover too weak. 1482 trivial. 0 not checked. [2021-01-06 17:04:23,513 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:04:23,513 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 14] total 54 [2021-01-06 17:04:23,514 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938657849] [2021-01-06 17:04:23,514 INFO L461 AbstractCegarLoop]: Interpolant automaton has 54 states [2021-01-06 17:04:23,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:04:23,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-01-06 17:04:23,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2021-01-06 17:04:23,515 INFO L87 Difference]: Start difference. First operand 107 states and 118 transitions. Second operand 54 states. [2021-01-06 17:04:23,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:04:23,821 INFO L93 Difference]: Finished difference Result 139 states and 165 transitions. [2021-01-06 17:04:23,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-01-06 17:04:23,822 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 106 [2021-01-06 17:04:23,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:04:23,823 INFO L225 Difference]: With dead ends: 139 [2021-01-06 17:04:23,823 INFO L226 Difference]: Without dead ends: 112 [2021-01-06 17:04:23,825 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2021-01-06 17:04:23,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-01-06 17:04:23,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 111. [2021-01-06 17:04:23,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2021-01-06 17:04:23,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 123 transitions. [2021-01-06 17:04:23,829 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 123 transitions. Word has length 106 [2021-01-06 17:04:23,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:04:23,830 INFO L481 AbstractCegarLoop]: Abstraction has 111 states and 123 transitions. [2021-01-06 17:04:23,830 INFO L482 AbstractCegarLoop]: Interpolant automaton has 54 states. [2021-01-06 17:04:23,830 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 123 transitions. [2021-01-06 17:04:23,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-01-06 17:04:23,831 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:04:23,831 INFO L422 BasicCegarLoop]: trace histogram [52, 40, 12, 1, 1, 1, 1, 1, 1] [2021-01-06 17:04:24,044 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-01-06 17:04:24,045 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:04:24,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:04:24,045 INFO L82 PathProgramCache]: Analyzing trace with hash 1987047205, now seen corresponding path program 37 times [2021-01-06 17:04:24,046 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:04:24,046 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4411676] [2021-01-06 17:04:24,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:04:24,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:04:25,167 INFO L134 CoverageAnalysis]: Checked inductivity of 2704 backedges. 943 proven. 1640 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2021-01-06 17:04:25,167 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4411676] [2021-01-06 17:04:25,167 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [513038892] [2021-01-06 17:04:25,167 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 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:04:25,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:04:25,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 42 conjunts are in the unsatisfiable core [2021-01-06 17:04:25,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:04:25,376 INFO L134 CoverageAnalysis]: Checked inductivity of 2704 backedges. 943 proven. 1640 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2021-01-06 17:04:25,376 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:04:25,376 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 44 [2021-01-06 17:04:25,377 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315140176] [2021-01-06 17:04:25,377 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2021-01-06 17:04:25,377 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:04:25,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-01-06 17:04:25,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2021-01-06 17:04:25,378 INFO L87 Difference]: Start difference. First operand 111 states and 123 transitions. Second operand 44 states. [2021-01-06 17:04:25,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:04:25,535 INFO L93 Difference]: Finished difference Result 142 states and 167 transitions. [2021-01-06 17:04:25,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-01-06 17:04:25,536 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 110 [2021-01-06 17:04:25,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:04:25,537 INFO L225 Difference]: With dead ends: 142 [2021-01-06 17:04:25,538 INFO L226 Difference]: Without dead ends: 113 [2021-01-06 17:04:25,539 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2021-01-06 17:04:25,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-01-06 17:04:25,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2021-01-06 17:04:25,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2021-01-06 17:04:25,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 125 transitions. [2021-01-06 17:04:25,544 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 125 transitions. Word has length 110 [2021-01-06 17:04:25,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:04:25,544 INFO L481 AbstractCegarLoop]: Abstraction has 113 states and 125 transitions. [2021-01-06 17:04:25,544 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2021-01-06 17:04:25,544 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 125 transitions. [2021-01-06 17:04:25,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-01-06 17:04:25,545 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:04:25,545 INFO L422 BasicCegarLoop]: trace histogram [53, 41, 12, 1, 1, 1, 1, 1, 1] [2021-01-06 17:04:25,755 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:04:25,755 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:04:25,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:04:25,756 INFO L82 PathProgramCache]: Analyzing trace with hash 1252870984, now seen corresponding path program 38 times [2021-01-06 17:04:25,756 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:04:25,757 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952381197] [2021-01-06 17:04:25,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:04:25,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:04:26,926 INFO L134 CoverageAnalysis]: Checked inductivity of 2809 backedges. 966 proven. 1722 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2021-01-06 17:04:26,926 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952381197] [2021-01-06 17:04:26,926 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1031752124] [2021-01-06 17:04:26,926 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 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:04:26,997 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 17:04:26,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:04:26,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 43 conjunts are in the unsatisfiable core [2021-01-06 17:04:27,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:04:27,143 INFO L134 CoverageAnalysis]: Checked inductivity of 2809 backedges. 966 proven. 1722 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2021-01-06 17:04:27,143 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:04:27,143 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 45 [2021-01-06 17:04:27,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692822809] [2021-01-06 17:04:27,144 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2021-01-06 17:04:27,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:04:27,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-01-06 17:04:27,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2021-01-06 17:04:27,145 INFO L87 Difference]: Start difference. First operand 113 states and 125 transitions. Second operand 45 states. [2021-01-06 17:04:27,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:04:27,367 INFO L93 Difference]: Finished difference Result 144 states and 169 transitions. [2021-01-06 17:04:27,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-01-06 17:04:27,367 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 112 [2021-01-06 17:04:27,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:04:27,371 INFO L225 Difference]: With dead ends: 144 [2021-01-06 17:04:27,372 INFO L226 Difference]: Without dead ends: 115 [2021-01-06 17:04:27,372 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2021-01-06 17:04:27,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-01-06 17:04:27,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2021-01-06 17:04:27,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2021-01-06 17:04:27,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 127 transitions. [2021-01-06 17:04:27,378 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 127 transitions. Word has length 112 [2021-01-06 17:04:27,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:04:27,378 INFO L481 AbstractCegarLoop]: Abstraction has 115 states and 127 transitions. [2021-01-06 17:04:27,378 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2021-01-06 17:04:27,378 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 127 transitions. [2021-01-06 17:04:27,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-01-06 17:04:27,379 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:04:27,379 INFO L422 BasicCegarLoop]: trace histogram [54, 42, 12, 1, 1, 1, 1, 1, 1] [2021-01-06 17:04:27,592 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:04:27,593 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:04:27,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:04:27,594 INFO L82 PathProgramCache]: Analyzing trace with hash 84159147, now seen corresponding path program 39 times [2021-01-06 17:04:27,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:04:27,594 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034285023] [2021-01-06 17:04:27,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:04:27,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:04:28,809 INFO L134 CoverageAnalysis]: Checked inductivity of 2916 backedges. 989 proven. 1806 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2021-01-06 17:04:28,810 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034285023] [2021-01-06 17:04:28,810 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1645913738] [2021-01-06 17:04:28,810 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:04:28,891 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 26 check-sat command(s) [2021-01-06 17:04:28,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:04:28,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-06 17:04:28,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:04:29,832 INFO L134 CoverageAnalysis]: Checked inductivity of 2916 backedges. 1050 proven. 144 refuted. 0 times theorem prover too weak. 1722 trivial. 0 not checked. [2021-01-06 17:04:29,832 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:04:29,832 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 15] total 58 [2021-01-06 17:04:29,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247001317] [2021-01-06 17:04:29,833 INFO L461 AbstractCegarLoop]: Interpolant automaton has 58 states [2021-01-06 17:04:29,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:04:29,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2021-01-06 17:04:29,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2021-01-06 17:04:29,834 INFO L87 Difference]: Start difference. First operand 115 states and 127 transitions. Second operand 58 states. [2021-01-06 17:04:30,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:04:30,171 INFO L93 Difference]: Finished difference Result 149 states and 177 transitions. [2021-01-06 17:04:30,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-01-06 17:04:30,171 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 114 [2021-01-06 17:04:30,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:04:30,173 INFO L225 Difference]: With dead ends: 149 [2021-01-06 17:04:30,173 INFO L226 Difference]: Without dead ends: 120 [2021-01-06 17:04:30,173 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2021-01-06 17:04:30,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-01-06 17:04:30,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 119. [2021-01-06 17:04:30,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2021-01-06 17:04:30,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 132 transitions. [2021-01-06 17:04:30,178 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 132 transitions. Word has length 114 [2021-01-06 17:04:30,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:04:30,179 INFO L481 AbstractCegarLoop]: Abstraction has 119 states and 132 transitions. [2021-01-06 17:04:30,179 INFO L482 AbstractCegarLoop]: Interpolant automaton has 58 states. [2021-01-06 17:04:30,179 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 132 transitions. [2021-01-06 17:04:30,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-01-06 17:04:30,180 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:04:30,180 INFO L422 BasicCegarLoop]: trace histogram [56, 43, 13, 1, 1, 1, 1, 1, 1] [2021-01-06 17:04:30,393 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:04:30,394 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:04:30,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:04:30,395 INFO L82 PathProgramCache]: Analyzing trace with hash -1023214541, now seen corresponding path program 40 times [2021-01-06 17:04:30,395 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:04:30,396 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442769482] [2021-01-06 17:04:30,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:04:30,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:04:31,606 INFO L134 CoverageAnalysis]: Checked inductivity of 3136 backedges. 1100 proven. 1892 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2021-01-06 17:04:31,606 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442769482] [2021-01-06 17:04:31,606 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999022989] [2021-01-06 17:04:31,606 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:04:31,686 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 17:04:31,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:04:31,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 45 conjunts are in the unsatisfiable core [2021-01-06 17:04:31,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:04:31,838 INFO L134 CoverageAnalysis]: Checked inductivity of 3136 backedges. 1100 proven. 1892 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2021-01-06 17:04:31,838 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:04:31,838 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 47 [2021-01-06 17:04:31,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930385593] [2021-01-06 17:04:31,840 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-01-06 17:04:31,840 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:04:31,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-01-06 17:04:31,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2021-01-06 17:04:31,841 INFO L87 Difference]: Start difference. First operand 119 states and 132 transitions. Second operand 47 states. [2021-01-06 17:04:32,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:04:32,015 INFO L93 Difference]: Finished difference Result 152 states and 179 transitions. [2021-01-06 17:04:32,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-01-06 17:04:32,018 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 118 [2021-01-06 17:04:32,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:04:32,019 INFO L225 Difference]: With dead ends: 152 [2021-01-06 17:04:32,020 INFO L226 Difference]: Without dead ends: 121 [2021-01-06 17:04:32,020 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2021-01-06 17:04:32,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-01-06 17:04:32,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2021-01-06 17:04:32,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2021-01-06 17:04:32,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 134 transitions. [2021-01-06 17:04:32,025 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 134 transitions. Word has length 118 [2021-01-06 17:04:32,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:04:32,025 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 134 transitions. [2021-01-06 17:04:32,025 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2021-01-06 17:04:32,025 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 134 transitions. [2021-01-06 17:04:32,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-01-06 17:04:32,026 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:04:32,026 INFO L422 BasicCegarLoop]: trace histogram [57, 44, 13, 1, 1, 1, 1, 1, 1] [2021-01-06 17:04:32,226 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-01-06 17:04:32,227 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:04:32,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:04:32,227 INFO L82 PathProgramCache]: Analyzing trace with hash -411073194, now seen corresponding path program 41 times [2021-01-06 17:04:32,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:04:32,228 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896374784] [2021-01-06 17:04:32,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:04:32,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:04:33,526 INFO L134 CoverageAnalysis]: Checked inductivity of 3249 backedges. 1125 proven. 1980 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2021-01-06 17:04:33,526 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896374784] [2021-01-06 17:04:33,527 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1139112776] [2021-01-06 17:04:33,527 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:04:33,628 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 58 check-sat command(s) [2021-01-06 17:04:33,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:04:33,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 46 conjunts are in the unsatisfiable core [2021-01-06 17:04:33,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:04:33,784 INFO L134 CoverageAnalysis]: Checked inductivity of 3249 backedges. 1125 proven. 1980 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2021-01-06 17:04:33,784 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:04:33,785 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 48 [2021-01-06 17:04:33,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413183289] [2021-01-06 17:04:33,785 INFO L461 AbstractCegarLoop]: Interpolant automaton has 48 states [2021-01-06 17:04:33,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:04:33,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-01-06 17:04:33,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2021-01-06 17:04:33,787 INFO L87 Difference]: Start difference. First operand 121 states and 134 transitions. Second operand 48 states. [2021-01-06 17:04:34,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:04:34,002 INFO L93 Difference]: Finished difference Result 154 states and 181 transitions. [2021-01-06 17:04:34,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-01-06 17:04:34,003 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 120 [2021-01-06 17:04:34,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:04:34,004 INFO L225 Difference]: With dead ends: 154 [2021-01-06 17:04:34,004 INFO L226 Difference]: Without dead ends: 123 [2021-01-06 17:04:34,004 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2021-01-06 17:04:34,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-01-06 17:04:34,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 123. [2021-01-06 17:04:34,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2021-01-06 17:04:34,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 136 transitions. [2021-01-06 17:04:34,009 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 136 transitions. Word has length 120 [2021-01-06 17:04:34,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:04:34,010 INFO L481 AbstractCegarLoop]: Abstraction has 123 states and 136 transitions. [2021-01-06 17:04:34,010 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2021-01-06 17:04:34,010 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 136 transitions. [2021-01-06 17:04:34,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-01-06 17:04:34,011 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:04:34,011 INFO L422 BasicCegarLoop]: trace histogram [58, 45, 13, 1, 1, 1, 1, 1, 1] [2021-01-06 17:04:34,224 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:04:34,225 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:04:34,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:04:34,225 INFO L82 PathProgramCache]: Analyzing trace with hash -553758279, now seen corresponding path program 42 times [2021-01-06 17:04:34,226 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:04:34,226 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743212204] [2021-01-06 17:04:34,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:04:34,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:04:35,643 INFO L134 CoverageAnalysis]: Checked inductivity of 3364 backedges. 1150 proven. 2070 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2021-01-06 17:04:35,643 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743212204] [2021-01-06 17:04:35,643 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1941974177] [2021-01-06 17:04:35,643 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 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:04:35,798 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 55 check-sat command(s) [2021-01-06 17:04:35,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:04:35,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 16 conjunts are in the unsatisfiable core [2021-01-06 17:04:35,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:04:36,893 INFO L134 CoverageAnalysis]: Checked inductivity of 3364 backedges. 1215 proven. 169 refuted. 0 times theorem prover too weak. 1980 trivial. 0 not checked. [2021-01-06 17:04:36,893 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:04:36,893 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 16] total 62 [2021-01-06 17:04:36,893 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087462129] [2021-01-06 17:04:36,894 INFO L461 AbstractCegarLoop]: Interpolant automaton has 62 states [2021-01-06 17:04:36,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:04:36,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2021-01-06 17:04:36,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2021-01-06 17:04:36,895 INFO L87 Difference]: Start difference. First operand 123 states and 136 transitions. Second operand 62 states. [2021-01-06 17:04:37,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:04:37,240 INFO L93 Difference]: Finished difference Result 159 states and 189 transitions. [2021-01-06 17:04:37,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-01-06 17:04:37,240 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 122 [2021-01-06 17:04:37,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:04:37,241 INFO L225 Difference]: With dead ends: 159 [2021-01-06 17:04:37,242 INFO L226 Difference]: Without dead ends: 128 [2021-01-06 17:04:37,242 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2021-01-06 17:04:37,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-01-06 17:04:37,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 127. [2021-01-06 17:04:37,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2021-01-06 17:04:37,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 141 transitions. [2021-01-06 17:04:37,247 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 141 transitions. Word has length 122 [2021-01-06 17:04:37,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:04:37,247 INFO L481 AbstractCegarLoop]: Abstraction has 127 states and 141 transitions. [2021-01-06 17:04:37,247 INFO L482 AbstractCegarLoop]: Interpolant automaton has 62 states. [2021-01-06 17:04:37,248 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 141 transitions. [2021-01-06 17:04:37,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-01-06 17:04:37,248 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:04:37,248 INFO L422 BasicCegarLoop]: trace histogram [60, 46, 14, 1, 1, 1, 1, 1, 1] [2021-01-06 17:04:37,462 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:04:37,462 INFO L429 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:04:37,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:04:37,463 INFO L82 PathProgramCache]: Analyzing trace with hash 1685652673, now seen corresponding path program 43 times [2021-01-06 17:04:37,463 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:04:37,464 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782914926] [2021-01-06 17:04:37,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:04:37,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:04:38,941 INFO L134 CoverageAnalysis]: Checked inductivity of 3600 backedges. 1269 proven. 2162 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2021-01-06 17:04:38,941 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782914926] [2021-01-06 17:04:38,941 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1177860236] [2021-01-06 17:04:38,941 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 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:04:39,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:04:39,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 48 conjunts are in the unsatisfiable core [2021-01-06 17:04:39,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:04:39,167 INFO L134 CoverageAnalysis]: Checked inductivity of 3600 backedges. 1269 proven. 2162 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2021-01-06 17:04:39,167 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:04:39,167 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 50 [2021-01-06 17:04:39,168 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816921793] [2021-01-06 17:04:39,168 INFO L461 AbstractCegarLoop]: Interpolant automaton has 50 states [2021-01-06 17:04:39,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:04:39,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-01-06 17:04:39,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2021-01-06 17:04:39,169 INFO L87 Difference]: Start difference. First operand 127 states and 141 transitions. Second operand 50 states. [2021-01-06 17:04:39,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:04:39,414 INFO L93 Difference]: Finished difference Result 162 states and 191 transitions. [2021-01-06 17:04:39,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-01-06 17:04:39,414 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 126 [2021-01-06 17:04:39,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:04:39,415 INFO L225 Difference]: With dead ends: 162 [2021-01-06 17:04:39,416 INFO L226 Difference]: Without dead ends: 129 [2021-01-06 17:04:39,416 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2021-01-06 17:04:39,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-01-06 17:04:39,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2021-01-06 17:04:39,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2021-01-06 17:04:39,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 143 transitions. [2021-01-06 17:04:39,421 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 143 transitions. Word has length 126 [2021-01-06 17:04:39,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:04:39,422 INFO L481 AbstractCegarLoop]: Abstraction has 129 states and 143 transitions. [2021-01-06 17:04:39,422 INFO L482 AbstractCegarLoop]: Interpolant automaton has 50 states. [2021-01-06 17:04:39,422 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 143 transitions. [2021-01-06 17:04:39,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-01-06 17:04:39,423 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:04:39,423 INFO L422 BasicCegarLoop]: trace histogram [61, 47, 14, 1, 1, 1, 1, 1, 1] [2021-01-06 17:04:39,637 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-01-06 17:04:39,638 INFO L429 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:04:39,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:04:39,639 INFO L82 PathProgramCache]: Analyzing trace with hash 834124516, now seen corresponding path program 44 times [2021-01-06 17:04:39,639 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:04:39,639 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563382324] [2021-01-06 17:04:39,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:04:39,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:04:41,173 INFO L134 CoverageAnalysis]: Checked inductivity of 3721 backedges. 1296 proven. 2256 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2021-01-06 17:04:41,173 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563382324] [2021-01-06 17:04:41,173 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644285075] [2021-01-06 17:04:41,174 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 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:04:41,255 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 17:04:41,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:04:41,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 49 conjunts are in the unsatisfiable core [2021-01-06 17:04:41,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:04:41,421 INFO L134 CoverageAnalysis]: Checked inductivity of 3721 backedges. 1296 proven. 2256 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2021-01-06 17:04:41,422 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:04:41,422 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 51 [2021-01-06 17:04:41,422 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41488118] [2021-01-06 17:04:41,422 INFO L461 AbstractCegarLoop]: Interpolant automaton has 51 states [2021-01-06 17:04:41,423 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:04:41,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-01-06 17:04:41,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2021-01-06 17:04:41,423 INFO L87 Difference]: Start difference. First operand 129 states and 143 transitions. Second operand 51 states. [2021-01-06 17:04:41,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:04:41,710 INFO L93 Difference]: Finished difference Result 164 states and 193 transitions. [2021-01-06 17:04:41,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-01-06 17:04:41,710 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 128 [2021-01-06 17:04:41,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:04:41,711 INFO L225 Difference]: With dead ends: 164 [2021-01-06 17:04:41,712 INFO L226 Difference]: Without dead ends: 131 [2021-01-06 17:04:41,712 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2021-01-06 17:04:41,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-01-06 17:04:41,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2021-01-06 17:04:41,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2021-01-06 17:04:41,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 145 transitions. [2021-01-06 17:04:41,718 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 145 transitions. Word has length 128 [2021-01-06 17:04:41,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:04:41,718 INFO L481 AbstractCegarLoop]: Abstraction has 131 states and 145 transitions. [2021-01-06 17:04:41,718 INFO L482 AbstractCegarLoop]: Interpolant automaton has 51 states. [2021-01-06 17:04:41,718 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 145 transitions. [2021-01-06 17:04:41,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-01-06 17:04:41,719 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:04:41,719 INFO L422 BasicCegarLoop]: trace histogram [62, 48, 14, 1, 1, 1, 1, 1, 1] [2021-01-06 17:04:41,934 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-01-06 17:04:41,935 INFO L429 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:04:41,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:04:41,935 INFO L82 PathProgramCache]: Analyzing trace with hash -1440648121, now seen corresponding path program 45 times [2021-01-06 17:04:41,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:04:41,936 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585060955] [2021-01-06 17:04:41,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:04:41,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:04:43,573 INFO L134 CoverageAnalysis]: Checked inductivity of 3844 backedges. 1323 proven. 2352 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2021-01-06 17:04:43,573 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585060955] [2021-01-06 17:04:43,573 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1988078320] [2021-01-06 17:04:43,573 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 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:04:43,660 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2021-01-06 17:04:43,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:04:43,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 17 conjunts are in the unsatisfiable core [2021-01-06 17:04:43,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:04:44,953 INFO L134 CoverageAnalysis]: Checked inductivity of 3844 backedges. 1392 proven. 196 refuted. 0 times theorem prover too weak. 2256 trivial. 0 not checked. [2021-01-06 17:04:44,954 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:04:44,954 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 17] total 66 [2021-01-06 17:04:44,954 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812806406] [2021-01-06 17:04:44,954 INFO L461 AbstractCegarLoop]: Interpolant automaton has 66 states [2021-01-06 17:04:44,954 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:04:44,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2021-01-06 17:04:44,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2021-01-06 17:04:44,955 INFO L87 Difference]: Start difference. First operand 131 states and 145 transitions. Second operand 66 states. [2021-01-06 17:04:45,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:04:45,370 INFO L93 Difference]: Finished difference Result 169 states and 201 transitions. [2021-01-06 17:04:45,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-01-06 17:04:45,371 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 130 [2021-01-06 17:04:45,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:04:45,372 INFO L225 Difference]: With dead ends: 169 [2021-01-06 17:04:45,372 INFO L226 Difference]: Without dead ends: 136 [2021-01-06 17:04:45,373 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2021-01-06 17:04:45,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-01-06 17:04:45,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 135. [2021-01-06 17:04:45,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2021-01-06 17:04:45,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 150 transitions. [2021-01-06 17:04:45,378 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 150 transitions. Word has length 130 [2021-01-06 17:04:45,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:04:45,379 INFO L481 AbstractCegarLoop]: Abstraction has 135 states and 150 transitions. [2021-01-06 17:04:45,379 INFO L482 AbstractCegarLoop]: Interpolant automaton has 66 states. [2021-01-06 17:04:45,379 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 150 transitions. [2021-01-06 17:04:45,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-01-06 17:04:45,380 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:04:45,380 INFO L422 BasicCegarLoop]: trace histogram [64, 49, 15, 1, 1, 1, 1, 1, 1] [2021-01-06 17:04:45,592 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-01-06 17:04:45,593 INFO L429 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:04:45,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:04:45,593 INFO L82 PathProgramCache]: Analyzing trace with hash -83220273, now seen corresponding path program 46 times [2021-01-06 17:04:45,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:04:45,594 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955591520] [2021-01-06 17:04:45,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:04:45,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:04:47,319 INFO L134 CoverageAnalysis]: Checked inductivity of 4096 backedges. 1450 proven. 2450 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2021-01-06 17:04:47,320 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955591520] [2021-01-06 17:04:47,320 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [111512884] [2021-01-06 17:04:47,320 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 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:04:47,398 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 17:04:47,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:04:47,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 51 conjunts are in the unsatisfiable core [2021-01-06 17:04:47,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:04:47,559 INFO L134 CoverageAnalysis]: Checked inductivity of 4096 backedges. 1450 proven. 2450 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2021-01-06 17:04:47,560 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:04:47,560 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 53 [2021-01-06 17:04:47,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397099364] [2021-01-06 17:04:47,561 INFO L461 AbstractCegarLoop]: Interpolant automaton has 53 states [2021-01-06 17:04:47,561 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:04:47,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-01-06 17:04:47,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2021-01-06 17:04:47,562 INFO L87 Difference]: Start difference. First operand 135 states and 150 transitions. Second operand 53 states. [2021-01-06 17:04:47,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:04:47,832 INFO L93 Difference]: Finished difference Result 172 states and 203 transitions. [2021-01-06 17:04:47,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-01-06 17:04:47,832 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 134 [2021-01-06 17:04:47,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:04:47,833 INFO L225 Difference]: With dead ends: 172 [2021-01-06 17:04:47,833 INFO L226 Difference]: Without dead ends: 137 [2021-01-06 17:04:47,834 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2021-01-06 17:04:47,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-01-06 17:04:47,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2021-01-06 17:04:47,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2021-01-06 17:04:47,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 152 transitions. [2021-01-06 17:04:47,839 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 152 transitions. Word has length 134 [2021-01-06 17:04:47,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:04:47,839 INFO L481 AbstractCegarLoop]: Abstraction has 137 states and 152 transitions. [2021-01-06 17:04:47,839 INFO L482 AbstractCegarLoop]: Interpolant automaton has 53 states. [2021-01-06 17:04:47,839 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 152 transitions. [2021-01-06 17:04:47,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-01-06 17:04:47,840 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:04:47,840 INFO L422 BasicCegarLoop]: trace histogram [65, 50, 15, 1, 1, 1, 1, 1, 1] [2021-01-06 17:04:48,055 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:04:48,056 INFO L429 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:04:48,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:04:48,056 INFO L82 PathProgramCache]: Analyzing trace with hash -1769075726, now seen corresponding path program 47 times [2021-01-06 17:04:48,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:04:48,057 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453208305] [2021-01-06 17:04:48,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:04:48,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:04:49,805 INFO L134 CoverageAnalysis]: Checked inductivity of 4225 backedges. 1479 proven. 2550 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2021-01-06 17:04:49,806 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453208305] [2021-01-06 17:04:49,806 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1834971370] [2021-01-06 17:04:49,806 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 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:04:49,929 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 66 check-sat command(s) [2021-01-06 17:04:49,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:04:49,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 52 conjunts are in the unsatisfiable core [2021-01-06 17:04:49,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:04:50,108 INFO L134 CoverageAnalysis]: Checked inductivity of 4225 backedges. 1479 proven. 2550 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2021-01-06 17:04:50,108 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:04:50,108 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 54 [2021-01-06 17:04:50,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873134046] [2021-01-06 17:04:50,109 INFO L461 AbstractCegarLoop]: Interpolant automaton has 54 states [2021-01-06 17:04:50,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:04:50,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-01-06 17:04:50,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2021-01-06 17:04:50,110 INFO L87 Difference]: Start difference. First operand 137 states and 152 transitions. Second operand 54 states. [2021-01-06 17:04:50,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:04:50,413 INFO L93 Difference]: Finished difference Result 174 states and 205 transitions. [2021-01-06 17:04:50,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-01-06 17:04:50,414 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 136 [2021-01-06 17:04:50,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:04:50,415 INFO L225 Difference]: With dead ends: 174 [2021-01-06 17:04:50,415 INFO L226 Difference]: Without dead ends: 139 [2021-01-06 17:04:50,415 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2021-01-06 17:04:50,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-01-06 17:04:50,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2021-01-06 17:04:50,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2021-01-06 17:04:50,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 154 transitions. [2021-01-06 17:04:50,421 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 154 transitions. Word has length 136 [2021-01-06 17:04:50,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:04:50,421 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 154 transitions. [2021-01-06 17:04:50,421 INFO L482 AbstractCegarLoop]: Interpolant automaton has 54 states. [2021-01-06 17:04:50,421 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 154 transitions. [2021-01-06 17:04:50,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2021-01-06 17:04:50,422 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:04:50,422 INFO L422 BasicCegarLoop]: trace histogram [66, 51, 15, 1, 1, 1, 1, 1, 1] [2021-01-06 17:04:50,635 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:04:50,636 INFO L429 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:04:50,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:04:50,636 INFO L82 PathProgramCache]: Analyzing trace with hash 1621471829, now seen corresponding path program 48 times [2021-01-06 17:04:50,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:04:50,637 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058723007] [2021-01-06 17:04:50,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:04:50,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:04:52,393 INFO L134 CoverageAnalysis]: Checked inductivity of 4356 backedges. 1508 proven. 2652 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2021-01-06 17:04:52,393 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058723007] [2021-01-06 17:04:52,394 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1053495410] [2021-01-06 17:04:52,394 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:04:52,543 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 63 check-sat command(s) [2021-01-06 17:04:52,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:04:52,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 18 conjunts are in the unsatisfiable core [2021-01-06 17:04:52,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:04:54,023 INFO L134 CoverageAnalysis]: Checked inductivity of 4356 backedges. 1581 proven. 225 refuted. 0 times theorem prover too weak. 2550 trivial. 0 not checked. [2021-01-06 17:04:54,023 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:04:54,023 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 18] total 70 [2021-01-06 17:04:54,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120522025] [2021-01-06 17:04:54,024 INFO L461 AbstractCegarLoop]: Interpolant automaton has 70 states [2021-01-06 17:04:54,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:04:54,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2021-01-06 17:04:54,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2021-01-06 17:04:54,025 INFO L87 Difference]: Start difference. First operand 139 states and 154 transitions. Second operand 70 states. [2021-01-06 17:04:54,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:04:54,382 INFO L93 Difference]: Finished difference Result 179 states and 213 transitions. [2021-01-06 17:04:54,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-01-06 17:04:54,383 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 138 [2021-01-06 17:04:54,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:04:54,384 INFO L225 Difference]: With dead ends: 179 [2021-01-06 17:04:54,384 INFO L226 Difference]: Without dead ends: 144 [2021-01-06 17:04:54,385 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2021-01-06 17:04:54,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-01-06 17:04:54,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 143. [2021-01-06 17:04:54,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2021-01-06 17:04:54,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 159 transitions. [2021-01-06 17:04:54,389 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 159 transitions. Word has length 138 [2021-01-06 17:04:54,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:04:54,389 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 159 transitions. [2021-01-06 17:04:54,389 INFO L482 AbstractCegarLoop]: Interpolant automaton has 70 states. [2021-01-06 17:04:54,389 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 159 transitions. [2021-01-06 17:04:54,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2021-01-06 17:04:54,390 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:04:54,390 INFO L422 BasicCegarLoop]: trace histogram [68, 52, 16, 1, 1, 1, 1, 1, 1] [2021-01-06 17:04:54,590 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:04:54,591 INFO L429 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:04:54,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:04:54,591 INFO L82 PathProgramCache]: Analyzing trace with hash -530151331, now seen corresponding path program 49 times [2021-01-06 17:04:54,592 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:04:54,592 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473161070] [2021-01-06 17:04:54,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:04:54,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:04:56,562 INFO L134 CoverageAnalysis]: Checked inductivity of 4624 backedges. 1643 proven. 2756 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2021-01-06 17:04:56,563 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473161070] [2021-01-06 17:04:56,563 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1698651203] [2021-01-06 17:04:56,563 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 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:04:56,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:04:56,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 54 conjunts are in the unsatisfiable core [2021-01-06 17:04:56,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:04:56,831 INFO L134 CoverageAnalysis]: Checked inductivity of 4624 backedges. 1643 proven. 2756 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2021-01-06 17:04:56,832 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:04:56,832 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 56 [2021-01-06 17:04:56,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074993393] [2021-01-06 17:04:56,833 INFO L461 AbstractCegarLoop]: Interpolant automaton has 56 states [2021-01-06 17:04:56,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:04:56,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-01-06 17:04:56,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2021-01-06 17:04:56,834 INFO L87 Difference]: Start difference. First operand 143 states and 159 transitions. Second operand 56 states. [2021-01-06 17:04:57,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:04:57,028 INFO L93 Difference]: Finished difference Result 182 states and 215 transitions. [2021-01-06 17:04:57,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-01-06 17:04:57,028 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 142 [2021-01-06 17:04:57,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:04:57,029 INFO L225 Difference]: With dead ends: 182 [2021-01-06 17:04:57,030 INFO L226 Difference]: Without dead ends: 145 [2021-01-06 17:04:57,030 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2021-01-06 17:04:57,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-01-06 17:04:57,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2021-01-06 17:04:57,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2021-01-06 17:04:57,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 161 transitions. [2021-01-06 17:04:57,035 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 161 transitions. Word has length 142 [2021-01-06 17:04:57,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:04:57,036 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 161 transitions. [2021-01-06 17:04:57,036 INFO L482 AbstractCegarLoop]: Interpolant automaton has 56 states. [2021-01-06 17:04:57,036 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 161 transitions. [2021-01-06 17:04:57,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2021-01-06 17:04:57,037 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:04:57,037 INFO L422 BasicCegarLoop]: trace histogram [69, 53, 16, 1, 1, 1, 1, 1, 1] [2021-01-06 17:04:57,251 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:04:57,251 INFO L429 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:04:57,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:04:57,252 INFO L82 PathProgramCache]: Analyzing trace with hash 1018337408, now seen corresponding path program 50 times [2021-01-06 17:04:57,252 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:04:57,252 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575594671] [2021-01-06 17:04:57,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:04:57,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:04:59,181 INFO L134 CoverageAnalysis]: Checked inductivity of 4761 backedges. 1674 proven. 2862 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2021-01-06 17:04:59,181 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575594671] [2021-01-06 17:04:59,182 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [976796755] [2021-01-06 17:04:59,182 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 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:04:59,268 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 17:04:59,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:04:59,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 351 conjuncts, 55 conjunts are in the unsatisfiable core [2021-01-06 17:04:59,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:04:59,459 INFO L134 CoverageAnalysis]: Checked inductivity of 4761 backedges. 1674 proven. 2862 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2021-01-06 17:04:59,459 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:04:59,459 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 57 [2021-01-06 17:04:59,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150899504] [2021-01-06 17:04:59,460 INFO L461 AbstractCegarLoop]: Interpolant automaton has 57 states [2021-01-06 17:04:59,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:04:59,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-01-06 17:04:59,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2021-01-06 17:04:59,461 INFO L87 Difference]: Start difference. First operand 145 states and 161 transitions. Second operand 57 states. [2021-01-06 17:04:59,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:04:59,758 INFO L93 Difference]: Finished difference Result 184 states and 217 transitions. [2021-01-06 17:04:59,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-01-06 17:04:59,759 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 144 [2021-01-06 17:04:59,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:04:59,760 INFO L225 Difference]: With dead ends: 184 [2021-01-06 17:04:59,760 INFO L226 Difference]: Without dead ends: 147 [2021-01-06 17:04:59,761 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2021-01-06 17:04:59,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-01-06 17:04:59,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 147. [2021-01-06 17:04:59,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2021-01-06 17:04:59,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 163 transitions. [2021-01-06 17:04:59,765 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 163 transitions. Word has length 144 [2021-01-06 17:04:59,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:04:59,766 INFO L481 AbstractCegarLoop]: Abstraction has 147 states and 163 transitions. [2021-01-06 17:04:59,766 INFO L482 AbstractCegarLoop]: Interpolant automaton has 57 states. [2021-01-06 17:04:59,766 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 163 transitions. [2021-01-06 17:04:59,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-01-06 17:04:59,767 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:04:59,767 INFO L422 BasicCegarLoop]: trace histogram [70, 54, 16, 1, 1, 1, 1, 1, 1] [2021-01-06 17:04:59,981 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2021-01-06 17:04:59,981 INFO L429 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:04:59,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:04:59,983 INFO L82 PathProgramCache]: Analyzing trace with hash -1237636125, now seen corresponding path program 51 times [2021-01-06 17:04:59,983 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:04:59,984 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458792207] [2021-01-06 17:04:59,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:05:00,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:05:02,021 INFO L134 CoverageAnalysis]: Checked inductivity of 4900 backedges. 1705 proven. 2970 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2021-01-06 17:05:02,021 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458792207] [2021-01-06 17:05:02,022 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1411711702] [2021-01-06 17:05:02,022 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:05:02,131 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 34 check-sat command(s) [2021-01-06 17:05:02,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:05:02,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 19 conjunts are in the unsatisfiable core [2021-01-06 17:05:02,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:05:03,780 INFO L134 CoverageAnalysis]: Checked inductivity of 4900 backedges. 1782 proven. 256 refuted. 0 times theorem prover too weak. 2862 trivial. 0 not checked. [2021-01-06 17:05:03,780 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:05:03,780 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 19] total 74 [2021-01-06 17:05:03,780 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643991480] [2021-01-06 17:05:03,781 INFO L461 AbstractCegarLoop]: Interpolant automaton has 74 states [2021-01-06 17:05:03,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:05:03,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2021-01-06 17:05:03,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2021-01-06 17:05:03,782 INFO L87 Difference]: Start difference. First operand 147 states and 163 transitions. Second operand 74 states. [2021-01-06 17:05:04,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:05:04,285 INFO L93 Difference]: Finished difference Result 189 states and 225 transitions. [2021-01-06 17:05:04,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-01-06 17:05:04,285 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 146 [2021-01-06 17:05:04,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:05:04,286 INFO L225 Difference]: With dead ends: 189 [2021-01-06 17:05:04,286 INFO L226 Difference]: Without dead ends: 152 [2021-01-06 17:05:04,287 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2021-01-06 17:05:04,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-01-06 17:05:04,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 151. [2021-01-06 17:05:04,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2021-01-06 17:05:04,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 168 transitions. [2021-01-06 17:05:04,293 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 168 transitions. Word has length 146 [2021-01-06 17:05:04,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:05:04,294 INFO L481 AbstractCegarLoop]: Abstraction has 151 states and 168 transitions. [2021-01-06 17:05:04,294 INFO L482 AbstractCegarLoop]: Interpolant automaton has 74 states. [2021-01-06 17:05:04,294 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 168 transitions. [2021-01-06 17:05:04,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-01-06 17:05:04,295 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:05:04,295 INFO L422 BasicCegarLoop]: trace histogram [72, 55, 17, 1, 1, 1, 1, 1, 1] [2021-01-06 17:05:04,510 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:05:04,510 INFO L429 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:05:04,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:05:04,511 INFO L82 PathProgramCache]: Analyzing trace with hash -1447672981, now seen corresponding path program 52 times [2021-01-06 17:05:04,511 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:05:04,511 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295370264] [2021-01-06 17:05:04,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:05:04,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:05:06,732 INFO L134 CoverageAnalysis]: Checked inductivity of 5184 backedges. 1848 proven. 3080 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2021-01-06 17:05:06,732 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295370264] [2021-01-06 17:05:06,732 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [749541597] [2021-01-06 17:05:06,732 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 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:05:06,819 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 17:05:06,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:05:06,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 57 conjunts are in the unsatisfiable core [2021-01-06 17:05:06,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:05:07,016 INFO L134 CoverageAnalysis]: Checked inductivity of 5184 backedges. 1848 proven. 3080 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2021-01-06 17:05:07,017 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:05:07,017 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 59 [2021-01-06 17:05:07,017 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460965933] [2021-01-06 17:05:07,018 INFO L461 AbstractCegarLoop]: Interpolant automaton has 59 states [2021-01-06 17:05:07,018 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:05:07,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2021-01-06 17:05:07,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2021-01-06 17:05:07,019 INFO L87 Difference]: Start difference. First operand 151 states and 168 transitions. Second operand 59 states. [2021-01-06 17:05:07,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:05:07,273 INFO L93 Difference]: Finished difference Result 192 states and 227 transitions. [2021-01-06 17:05:07,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-01-06 17:05:07,274 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 150 [2021-01-06 17:05:07,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:05:07,276 INFO L225 Difference]: With dead ends: 192 [2021-01-06 17:05:07,276 INFO L226 Difference]: Without dead ends: 153 [2021-01-06 17:05:07,277 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2021-01-06 17:05:07,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-01-06 17:05:07,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 153. [2021-01-06 17:05:07,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2021-01-06 17:05:07,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 170 transitions. [2021-01-06 17:05:07,281 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 170 transitions. Word has length 150 [2021-01-06 17:05:07,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:05:07,282 INFO L481 AbstractCegarLoop]: Abstraction has 153 states and 170 transitions. [2021-01-06 17:05:07,282 INFO L482 AbstractCegarLoop]: Interpolant automaton has 59 states. [2021-01-06 17:05:07,282 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 170 transitions. [2021-01-06 17:05:07,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2021-01-06 17:05:07,283 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:05:07,283 INFO L422 BasicCegarLoop]: trace histogram [73, 56, 17, 1, 1, 1, 1, 1, 1] [2021-01-06 17:05:07,497 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-01-06 17:05:07,498 INFO L429 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:05:07,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:05:07,498 INFO L82 PathProgramCache]: Analyzing trace with hash -2041741170, now seen corresponding path program 53 times [2021-01-06 17:05:07,499 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:05:07,499 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404316450] [2021-01-06 17:05:07,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:05:07,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:05:09,704 INFO L134 CoverageAnalysis]: Checked inductivity of 5329 backedges. 1881 proven. 3192 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2021-01-06 17:05:09,705 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404316450] [2021-01-06 17:05:09,705 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [729174721] [2021-01-06 17:05:09,705 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 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:05:09,844 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 74 check-sat command(s) [2021-01-06 17:05:09,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:05:09,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 58 conjunts are in the unsatisfiable core [2021-01-06 17:05:09,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:05:10,039 INFO L134 CoverageAnalysis]: Checked inductivity of 5329 backedges. 1881 proven. 3192 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2021-01-06 17:05:10,040 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:05:10,040 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 60 [2021-01-06 17:05:10,040 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382487507] [2021-01-06 17:05:10,041 INFO L461 AbstractCegarLoop]: Interpolant automaton has 60 states [2021-01-06 17:05:10,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:05:10,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2021-01-06 17:05:10,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2021-01-06 17:05:10,042 INFO L87 Difference]: Start difference. First operand 153 states and 170 transitions. Second operand 60 states. [2021-01-06 17:05:10,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:05:10,285 INFO L93 Difference]: Finished difference Result 194 states and 229 transitions. [2021-01-06 17:05:10,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-01-06 17:05:10,285 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 152 [2021-01-06 17:05:10,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:05:10,286 INFO L225 Difference]: With dead ends: 194 [2021-01-06 17:05:10,286 INFO L226 Difference]: Without dead ends: 155 [2021-01-06 17:05:10,287 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2021-01-06 17:05:10,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-01-06 17:05:10,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 155. [2021-01-06 17:05:10,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2021-01-06 17:05:10,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 172 transitions. [2021-01-06 17:05:10,292 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 172 transitions. Word has length 152 [2021-01-06 17:05:10,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:05:10,292 INFO L481 AbstractCegarLoop]: Abstraction has 155 states and 172 transitions. [2021-01-06 17:05:10,292 INFO L482 AbstractCegarLoop]: Interpolant automaton has 60 states. [2021-01-06 17:05:10,292 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 172 transitions. [2021-01-06 17:05:10,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-01-06 17:05:10,293 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:05:10,293 INFO L422 BasicCegarLoop]: trace histogram [74, 57, 17, 1, 1, 1, 1, 1, 1] [2021-01-06 17:05:10,508 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-01-06 17:05:10,509 INFO L429 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:05:10,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:05:10,509 INFO L82 PathProgramCache]: Analyzing trace with hash -1710620431, now seen corresponding path program 54 times [2021-01-06 17:05:10,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:05:10,510 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104703332] [2021-01-06 17:05:10,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:05:10,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:05:12,861 INFO L134 CoverageAnalysis]: Checked inductivity of 5476 backedges. 1914 proven. 3306 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2021-01-06 17:05:12,862 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104703332] [2021-01-06 17:05:12,862 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1940064100] [2021-01-06 17:05:12,862 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 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:05:13,035 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 71 check-sat command(s) [2021-01-06 17:05:13,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:05:13,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 357 conjuncts, 20 conjunts are in the unsatisfiable core [2021-01-06 17:05:13,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:05:14,877 INFO L134 CoverageAnalysis]: Checked inductivity of 5476 backedges. 1995 proven. 289 refuted. 0 times theorem prover too weak. 3192 trivial. 0 not checked. [2021-01-06 17:05:14,877 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:05:14,878 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 20] total 78 [2021-01-06 17:05:14,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065939256] [2021-01-06 17:05:14,878 INFO L461 AbstractCegarLoop]: Interpolant automaton has 78 states [2021-01-06 17:05:14,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:05:14,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2021-01-06 17:05:14,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2021-01-06 17:05:14,880 INFO L87 Difference]: Start difference. First operand 155 states and 172 transitions. Second operand 78 states. [2021-01-06 17:05:15,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:05:15,381 INFO L93 Difference]: Finished difference Result 199 states and 237 transitions. [2021-01-06 17:05:15,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-01-06 17:05:15,382 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 154 [2021-01-06 17:05:15,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:05:15,383 INFO L225 Difference]: With dead ends: 199 [2021-01-06 17:05:15,383 INFO L226 Difference]: Without dead ends: 160 [2021-01-06 17:05:15,383 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2021-01-06 17:05:15,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-01-06 17:05:15,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 159. [2021-01-06 17:05:15,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2021-01-06 17:05:15,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 177 transitions. [2021-01-06 17:05:15,389 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 177 transitions. Word has length 154 [2021-01-06 17:05:15,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:05:15,390 INFO L481 AbstractCegarLoop]: Abstraction has 159 states and 177 transitions. [2021-01-06 17:05:15,390 INFO L482 AbstractCegarLoop]: Interpolant automaton has 78 states. [2021-01-06 17:05:15,390 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 177 transitions. [2021-01-06 17:05:15,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2021-01-06 17:05:15,391 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:05:15,391 INFO L422 BasicCegarLoop]: trace histogram [76, 58, 18, 1, 1, 1, 1, 1, 1] [2021-01-06 17:05:15,601 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:05:15,602 INFO L429 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:05:15,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:05:15,603 INFO L82 PathProgramCache]: Analyzing trace with hash 697924089, now seen corresponding path program 55 times [2021-01-06 17:05:15,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:05:15,603 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301534388] [2021-01-06 17:05:15,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:05:15,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:05:17,888 INFO L134 CoverageAnalysis]: Checked inductivity of 5776 backedges. 2065 proven. 3422 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2021-01-06 17:05:17,888 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301534388] [2021-01-06 17:05:17,888 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [422657038] [2021-01-06 17:05:17,888 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 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:05:17,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:05:17,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 383 conjuncts, 60 conjunts are in the unsatisfiable core [2021-01-06 17:05:17,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:05:18,181 INFO L134 CoverageAnalysis]: Checked inductivity of 5776 backedges. 2065 proven. 3422 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2021-01-06 17:05:18,181 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:05:18,181 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 62 [2021-01-06 17:05:18,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165098451] [2021-01-06 17:05:18,187 INFO L461 AbstractCegarLoop]: Interpolant automaton has 62 states [2021-01-06 17:05:18,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:05:18,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2021-01-06 17:05:18,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2021-01-06 17:05:18,190 INFO L87 Difference]: Start difference. First operand 159 states and 177 transitions. Second operand 62 states. [2021-01-06 17:05:18,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:05:18,536 INFO L93 Difference]: Finished difference Result 202 states and 239 transitions. [2021-01-06 17:05:18,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-01-06 17:05:18,537 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 158 [2021-01-06 17:05:18,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:05:18,538 INFO L225 Difference]: With dead ends: 202 [2021-01-06 17:05:18,538 INFO L226 Difference]: Without dead ends: 161 [2021-01-06 17:05:18,539 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2021-01-06 17:05:18,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-01-06 17:05:18,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 161. [2021-01-06 17:05:18,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2021-01-06 17:05:18,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 179 transitions. [2021-01-06 17:05:18,543 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 179 transitions. Word has length 158 [2021-01-06 17:05:18,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:05:18,543 INFO L481 AbstractCegarLoop]: Abstraction has 161 states and 179 transitions. [2021-01-06 17:05:18,543 INFO L482 AbstractCegarLoop]: Interpolant automaton has 62 states. [2021-01-06 17:05:18,544 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 179 transitions. [2021-01-06 17:05:18,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-01-06 17:05:18,544 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:05:18,545 INFO L422 BasicCegarLoop]: trace histogram [77, 59, 18, 1, 1, 1, 1, 1, 1] [2021-01-06 17:05:18,758 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-01-06 17:05:18,759 INFO L429 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:05:18,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:05:18,759 INFO L82 PathProgramCache]: Analyzing trace with hash 318694428, now seen corresponding path program 56 times [2021-01-06 17:05:18,760 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:05:18,760 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425266353] [2021-01-06 17:05:18,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:05:18,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:05:21,143 INFO L134 CoverageAnalysis]: Checked inductivity of 5929 backedges. 2100 proven. 3540 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2021-01-06 17:05:21,144 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425266353] [2021-01-06 17:05:21,144 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1879130043] [2021-01-06 17:05:21,144 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 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:05:21,235 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 17:05:21,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:05:21,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 387 conjuncts, 61 conjunts are in the unsatisfiable core [2021-01-06 17:05:21,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:05:21,441 INFO L134 CoverageAnalysis]: Checked inductivity of 5929 backedges. 2100 proven. 3540 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2021-01-06 17:05:21,442 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:05:21,442 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 63 [2021-01-06 17:05:21,442 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361959740] [2021-01-06 17:05:21,442 INFO L461 AbstractCegarLoop]: Interpolant automaton has 63 states [2021-01-06 17:05:21,443 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:05:21,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2021-01-06 17:05:21,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2021-01-06 17:05:21,443 INFO L87 Difference]: Start difference. First operand 161 states and 179 transitions. Second operand 63 states. [2021-01-06 17:05:21,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:05:21,792 INFO L93 Difference]: Finished difference Result 204 states and 241 transitions. [2021-01-06 17:05:21,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-01-06 17:05:21,793 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 160 [2021-01-06 17:05:21,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:05:21,795 INFO L225 Difference]: With dead ends: 204 [2021-01-06 17:05:21,795 INFO L226 Difference]: Without dead ends: 163 [2021-01-06 17:05:21,795 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2021-01-06 17:05:21,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2021-01-06 17:05:21,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 163. [2021-01-06 17:05:21,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2021-01-06 17:05:21,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 181 transitions. [2021-01-06 17:05:21,804 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 181 transitions. Word has length 160 [2021-01-06 17:05:21,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:05:21,804 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 181 transitions. [2021-01-06 17:05:21,804 INFO L482 AbstractCegarLoop]: Interpolant automaton has 63 states. [2021-01-06 17:05:21,805 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 181 transitions. [2021-01-06 17:05:21,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2021-01-06 17:05:21,805 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:05:21,806 INFO L422 BasicCegarLoop]: trace histogram [78, 60, 18, 1, 1, 1, 1, 1, 1] [2021-01-06 17:05:22,018 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:05:22,019 INFO L429 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:05:22,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:05:22,019 INFO L82 PathProgramCache]: Analyzing trace with hash 951210367, now seen corresponding path program 57 times [2021-01-06 17:05:22,020 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:05:22,020 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556117941] [2021-01-06 17:05:22,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:05:22,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:05:24,526 INFO L134 CoverageAnalysis]: Checked inductivity of 6084 backedges. 2135 proven. 3660 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2021-01-06 17:05:24,526 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556117941] [2021-01-06 17:05:24,526 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1044738107] [2021-01-06 17:05:24,526 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 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:05:24,632 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 38 check-sat command(s) [2021-01-06 17:05:24,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:05:24,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 21 conjunts are in the unsatisfiable core [2021-01-06 17:05:24,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:05:26,591 INFO L134 CoverageAnalysis]: Checked inductivity of 6084 backedges. 2220 proven. 324 refuted. 0 times theorem prover too weak. 3540 trivial. 0 not checked. [2021-01-06 17:05:26,591 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:05:26,591 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 21] total 82 [2021-01-06 17:05:26,591 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78172488] [2021-01-06 17:05:26,592 INFO L461 AbstractCegarLoop]: Interpolant automaton has 82 states [2021-01-06 17:05:26,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:05:26,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2021-01-06 17:05:26,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2021-01-06 17:05:26,593 INFO L87 Difference]: Start difference. First operand 163 states and 181 transitions. Second operand 82 states. [2021-01-06 17:05:27,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:05:27,173 INFO L93 Difference]: Finished difference Result 209 states and 249 transitions. [2021-01-06 17:05:27,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-01-06 17:05:27,173 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 162 [2021-01-06 17:05:27,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:05:27,175 INFO L225 Difference]: With dead ends: 209 [2021-01-06 17:05:27,175 INFO L226 Difference]: Without dead ends: 168 [2021-01-06 17:05:27,175 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2021-01-06 17:05:27,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2021-01-06 17:05:27,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 167. [2021-01-06 17:05:27,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2021-01-06 17:05:27,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 186 transitions. [2021-01-06 17:05:27,181 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 186 transitions. Word has length 162 [2021-01-06 17:05:27,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:05:27,181 INFO L481 AbstractCegarLoop]: Abstraction has 167 states and 186 transitions. [2021-01-06 17:05:27,181 INFO L482 AbstractCegarLoop]: Interpolant automaton has 82 states. [2021-01-06 17:05:27,181 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 186 transitions. [2021-01-06 17:05:27,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2021-01-06 17:05:27,182 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:05:27,182 INFO L422 BasicCegarLoop]: trace histogram [80, 61, 19, 1, 1, 1, 1, 1, 1] [2021-01-06 17:05:27,396 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2021-01-06 17:05:27,397 INFO L429 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:05:27,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:05:27,397 INFO L82 PathProgramCache]: Analyzing trace with hash -232240121, now seen corresponding path program 58 times [2021-01-06 17:05:27,398 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:05:27,398 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100078675] [2021-01-06 17:05:27,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:05:27,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:05:29,957 INFO L134 CoverageAnalysis]: Checked inductivity of 6400 backedges. 2294 proven. 3782 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2021-01-06 17:05:29,958 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100078675] [2021-01-06 17:05:29,958 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1895498214] [2021-01-06 17:05:29,958 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:05:30,044 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 17:05:30,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:05:30,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 63 conjunts are in the unsatisfiable core [2021-01-06 17:05:30,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:05:30,252 INFO L134 CoverageAnalysis]: Checked inductivity of 6400 backedges. 2294 proven. 3782 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2021-01-06 17:05:30,253 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:05:30,253 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 65 [2021-01-06 17:05:30,253 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939264543] [2021-01-06 17:05:30,253 INFO L461 AbstractCegarLoop]: Interpolant automaton has 65 states [2021-01-06 17:05:30,253 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:05:30,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2021-01-06 17:05:30,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2021-01-06 17:05:30,254 INFO L87 Difference]: Start difference. First operand 167 states and 186 transitions. Second operand 65 states. [2021-01-06 17:05:30,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:05:30,529 INFO L93 Difference]: Finished difference Result 212 states and 251 transitions. [2021-01-06 17:05:30,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-01-06 17:05:30,530 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 166 [2021-01-06 17:05:30,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:05:30,531 INFO L225 Difference]: With dead ends: 212 [2021-01-06 17:05:30,531 INFO L226 Difference]: Without dead ends: 169 [2021-01-06 17:05:30,532 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2021-01-06 17:05:30,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-01-06 17:05:30,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 169. [2021-01-06 17:05:30,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2021-01-06 17:05:30,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 188 transitions. [2021-01-06 17:05:30,538 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 188 transitions. Word has length 166 [2021-01-06 17:05:30,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:05:30,539 INFO L481 AbstractCegarLoop]: Abstraction has 169 states and 188 transitions. [2021-01-06 17:05:30,539 INFO L482 AbstractCegarLoop]: Interpolant automaton has 65 states. [2021-01-06 17:05:30,539 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 188 transitions. [2021-01-06 17:05:30,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2021-01-06 17:05:30,540 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:05:30,540 INFO L422 BasicCegarLoop]: trace histogram [81, 62, 19, 1, 1, 1, 1, 1, 1] [2021-01-06 17:05:30,754 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:05:30,755 INFO L429 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:05:30,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:05:30,755 INFO L82 PathProgramCache]: Analyzing trace with hash 1105126186, now seen corresponding path program 59 times [2021-01-06 17:05:30,756 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:05:30,756 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832802923] [2021-01-06 17:05:30,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:05:30,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:05:33,478 INFO L134 CoverageAnalysis]: Checked inductivity of 6561 backedges. 2331 proven. 3906 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2021-01-06 17:05:33,478 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832802923] [2021-01-06 17:05:33,478 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1593453980] [2021-01-06 17:05:33,478 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 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:05:33,620 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 82 check-sat command(s) [2021-01-06 17:05:33,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:05:33,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 405 conjuncts, 64 conjunts are in the unsatisfiable core [2021-01-06 17:05:33,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:05:33,852 INFO L134 CoverageAnalysis]: Checked inductivity of 6561 backedges. 2331 proven. 3906 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2021-01-06 17:05:33,853 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:05:33,853 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 66 [2021-01-06 17:05:33,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015464443] [2021-01-06 17:05:33,853 INFO L461 AbstractCegarLoop]: Interpolant automaton has 66 states [2021-01-06 17:05:33,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:05:33,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2021-01-06 17:05:33,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2021-01-06 17:05:33,854 INFO L87 Difference]: Start difference. First operand 169 states and 188 transitions. Second operand 66 states. [2021-01-06 17:05:34,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:05:34,221 INFO L93 Difference]: Finished difference Result 214 states and 253 transitions. [2021-01-06 17:05:34,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-01-06 17:05:34,222 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 168 [2021-01-06 17:05:34,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:05:34,223 INFO L225 Difference]: With dead ends: 214 [2021-01-06 17:05:34,224 INFO L226 Difference]: Without dead ends: 171 [2021-01-06 17:05:34,225 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2021-01-06 17:05:34,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2021-01-06 17:05:34,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 171. [2021-01-06 17:05:34,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2021-01-06 17:05:34,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 190 transitions. [2021-01-06 17:05:34,231 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 190 transitions. Word has length 168 [2021-01-06 17:05:34,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:05:34,231 INFO L481 AbstractCegarLoop]: Abstraction has 171 states and 190 transitions. [2021-01-06 17:05:34,231 INFO L482 AbstractCegarLoop]: Interpolant automaton has 66 states. [2021-01-06 17:05:34,231 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 190 transitions. [2021-01-06 17:05:34,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-01-06 17:05:34,232 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:05:34,232 INFO L422 BasicCegarLoop]: trace histogram [82, 63, 19, 1, 1, 1, 1, 1, 1] [2021-01-06 17:05:34,445 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2021-01-06 17:05:34,446 INFO L429 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:05:34,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:05:34,446 INFO L82 PathProgramCache]: Analyzing trace with hash 2118925709, now seen corresponding path program 60 times [2021-01-06 17:05:34,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:05:34,447 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36568864] [2021-01-06 17:05:34,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:05:34,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:05:37,156 INFO L134 CoverageAnalysis]: Checked inductivity of 6724 backedges. 2368 proven. 4032 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2021-01-06 17:05:37,156 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36568864] [2021-01-06 17:05:37,156 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [687532099] [2021-01-06 17:05:37,156 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:05:37,332 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 79 check-sat command(s) [2021-01-06 17:05:37,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:05:37,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 393 conjuncts, 22 conjunts are in the unsatisfiable core [2021-01-06 17:05:37,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:05:39,367 INFO L134 CoverageAnalysis]: Checked inductivity of 6724 backedges. 2457 proven. 361 refuted. 0 times theorem prover too weak. 3906 trivial. 0 not checked. [2021-01-06 17:05:39,367 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:05:39,367 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 22] total 86 [2021-01-06 17:05:39,367 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038898690] [2021-01-06 17:05:39,368 INFO L461 AbstractCegarLoop]: Interpolant automaton has 86 states [2021-01-06 17:05:39,368 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:05:39,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2021-01-06 17:05:39,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3655, Invalid=3655, Unknown=0, NotChecked=0, Total=7310 [2021-01-06 17:05:39,369 INFO L87 Difference]: Start difference. First operand 171 states and 190 transitions. Second operand 86 states. [2021-01-06 17:05:39,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:05:39,964 INFO L93 Difference]: Finished difference Result 219 states and 261 transitions. [2021-01-06 17:05:39,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-01-06 17:05:39,964 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 170 [2021-01-06 17:05:39,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:05:39,966 INFO L225 Difference]: With dead ends: 219 [2021-01-06 17:05:39,966 INFO L226 Difference]: Without dead ends: 176 [2021-01-06 17:05:39,967 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=3655, Invalid=3655, Unknown=0, NotChecked=0, Total=7310 [2021-01-06 17:05:39,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2021-01-06 17:05:39,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 175. [2021-01-06 17:05:39,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2021-01-06 17:05:39,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 195 transitions. [2021-01-06 17:05:39,972 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 195 transitions. Word has length 170 [2021-01-06 17:05:39,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:05:39,972 INFO L481 AbstractCegarLoop]: Abstraction has 175 states and 195 transitions. [2021-01-06 17:05:39,972 INFO L482 AbstractCegarLoop]: Interpolant automaton has 86 states. [2021-01-06 17:05:39,972 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 195 transitions. [2021-01-06 17:05:39,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2021-01-06 17:05:39,973 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:05:39,973 INFO L422 BasicCegarLoop]: trace histogram [84, 64, 20, 1, 1, 1, 1, 1, 1] [2021-01-06 17:05:40,187 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:05:40,188 INFO L429 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:05:40,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:05:40,188 INFO L82 PathProgramCache]: Analyzing trace with hash 1458755989, now seen corresponding path program 61 times [2021-01-06 17:05:40,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:05:40,189 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81011022] [2021-01-06 17:05:40,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:05:40,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:05:43,088 INFO L134 CoverageAnalysis]: Checked inductivity of 7056 backedges. 2535 proven. 4160 refuted. 0 times theorem prover too weak. 361 trivial. 0 not checked. [2021-01-06 17:05:43,088 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81011022] [2021-01-06 17:05:43,088 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [383287722] [2021-01-06 17:05:43,089 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 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:05:43,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:05:43,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 419 conjuncts, 66 conjunts are in the unsatisfiable core [2021-01-06 17:05:43,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:05:43,409 INFO L134 CoverageAnalysis]: Checked inductivity of 7056 backedges. 2535 proven. 4160 refuted. 0 times theorem prover too weak. 361 trivial. 0 not checked. [2021-01-06 17:05:43,410 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:05:43,410 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 68 [2021-01-06 17:05:43,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318837935] [2021-01-06 17:05:43,410 INFO L461 AbstractCegarLoop]: Interpolant automaton has 68 states [2021-01-06 17:05:43,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:05:43,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2021-01-06 17:05:43,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2021-01-06 17:05:43,412 INFO L87 Difference]: Start difference. First operand 175 states and 195 transitions. Second operand 68 states. [2021-01-06 17:05:43,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:05:43,671 INFO L93 Difference]: Finished difference Result 222 states and 263 transitions. [2021-01-06 17:05:43,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-01-06 17:05:43,672 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 174 [2021-01-06 17:05:43,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:05:43,673 INFO L225 Difference]: With dead ends: 222 [2021-01-06 17:05:43,673 INFO L226 Difference]: Without dead ends: 177 [2021-01-06 17:05:43,674 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2021-01-06 17:05:43,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2021-01-06 17:05:43,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 177. [2021-01-06 17:05:43,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2021-01-06 17:05:43,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 197 transitions. [2021-01-06 17:05:43,680 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 197 transitions. Word has length 174 [2021-01-06 17:05:43,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:05:43,680 INFO L481 AbstractCegarLoop]: Abstraction has 177 states and 197 transitions. [2021-01-06 17:05:43,681 INFO L482 AbstractCegarLoop]: Interpolant automaton has 68 states. [2021-01-06 17:05:43,681 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 197 transitions. [2021-01-06 17:05:43,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2021-01-06 17:05:43,682 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:05:43,682 INFO L422 BasicCegarLoop]: trace histogram [85, 65, 20, 1, 1, 1, 1, 1, 1] [2021-01-06 17:05:43,893 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2021-01-06 17:05:43,893 INFO L429 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:05:43,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:05:43,894 INFO L82 PathProgramCache]: Analyzing trace with hash 863870392, now seen corresponding path program 62 times [2021-01-06 17:05:43,894 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:05:43,895 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721977284] [2021-01-06 17:05:43,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:05:43,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:05:46,841 INFO L134 CoverageAnalysis]: Checked inductivity of 7225 backedges. 2574 proven. 4290 refuted. 0 times theorem prover too weak. 361 trivial. 0 not checked. [2021-01-06 17:05:46,841 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721977284] [2021-01-06 17:05:46,841 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [43477566] [2021-01-06 17:05:46,842 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 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:05:46,934 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 17:05:46,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:05:46,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 423 conjuncts, 67 conjunts are in the unsatisfiable core [2021-01-06 17:05:46,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:05:47,167 INFO L134 CoverageAnalysis]: Checked inductivity of 7225 backedges. 2574 proven. 4290 refuted. 0 times theorem prover too weak. 361 trivial. 0 not checked. [2021-01-06 17:05:47,167 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:05:47,168 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 69 [2021-01-06 17:05:47,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616817962] [2021-01-06 17:05:47,173 INFO L461 AbstractCegarLoop]: Interpolant automaton has 69 states [2021-01-06 17:05:47,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:05:47,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2021-01-06 17:05:47,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2021-01-06 17:05:47,175 INFO L87 Difference]: Start difference. First operand 177 states and 197 transitions. Second operand 69 states. [2021-01-06 17:05:47,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:05:47,500 INFO L93 Difference]: Finished difference Result 224 states and 265 transitions. [2021-01-06 17:05:47,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-01-06 17:05:47,501 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 176 [2021-01-06 17:05:47,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:05:47,502 INFO L225 Difference]: With dead ends: 224 [2021-01-06 17:05:47,502 INFO L226 Difference]: Without dead ends: 179 [2021-01-06 17:05:47,502 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2021-01-06 17:05:47,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2021-01-06 17:05:47,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 179. [2021-01-06 17:05:47,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2021-01-06 17:05:47,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 199 transitions. [2021-01-06 17:05:47,508 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 199 transitions. Word has length 176 [2021-01-06 17:05:47,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:05:47,508 INFO L481 AbstractCegarLoop]: Abstraction has 179 states and 199 transitions. [2021-01-06 17:05:47,508 INFO L482 AbstractCegarLoop]: Interpolant automaton has 69 states. [2021-01-06 17:05:47,509 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 199 transitions. [2021-01-06 17:05:47,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2021-01-06 17:05:47,509 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:05:47,510 INFO L422 BasicCegarLoop]: trace histogram [86, 66, 20, 1, 1, 1, 1, 1, 1] [2021-01-06 17:05:47,724 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:05:47,725 INFO L429 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:05:47,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:05:47,725 INFO L82 PathProgramCache]: Analyzing trace with hash 409462043, now seen corresponding path program 63 times [2021-01-06 17:05:47,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:05:47,726 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195808377] [2021-01-06 17:05:47,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:05:47,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:05:50,842 INFO L134 CoverageAnalysis]: Checked inductivity of 7396 backedges. 2613 proven. 4422 refuted. 0 times theorem prover too weak. 361 trivial. 0 not checked. [2021-01-06 17:05:50,842 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195808377] [2021-01-06 17:05:50,843 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [630272591] [2021-01-06 17:05:50,843 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:05:50,948 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 42 check-sat command(s) [2021-01-06 17:05:50,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:05:50,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 23 conjunts are in the unsatisfiable core [2021-01-06 17:05:50,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:05:53,322 INFO L134 CoverageAnalysis]: Checked inductivity of 7396 backedges. 2706 proven. 400 refuted. 0 times theorem prover too weak. 4290 trivial. 0 not checked. [2021-01-06 17:05:53,323 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:05:53,323 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 23] total 90 [2021-01-06 17:05:53,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451648618] [2021-01-06 17:05:53,324 INFO L461 AbstractCegarLoop]: Interpolant automaton has 90 states [2021-01-06 17:05:53,324 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:05:53,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2021-01-06 17:05:53,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4005, Invalid=4005, Unknown=0, NotChecked=0, Total=8010 [2021-01-06 17:05:53,326 INFO L87 Difference]: Start difference. First operand 179 states and 199 transitions. Second operand 90 states. [2021-01-06 17:05:54,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:05:54,010 INFO L93 Difference]: Finished difference Result 229 states and 273 transitions. [2021-01-06 17:05:54,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2021-01-06 17:05:54,011 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 178 [2021-01-06 17:05:54,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:05:54,012 INFO L225 Difference]: With dead ends: 229 [2021-01-06 17:05:54,012 INFO L226 Difference]: Without dead ends: 184 [2021-01-06 17:05:54,013 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=4005, Invalid=4005, Unknown=0, NotChecked=0, Total=8010 [2021-01-06 17:05:54,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2021-01-06 17:05:54,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 183. [2021-01-06 17:05:54,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2021-01-06 17:05:54,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 204 transitions. [2021-01-06 17:05:54,017 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 204 transitions. Word has length 178 [2021-01-06 17:05:54,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:05:54,017 INFO L481 AbstractCegarLoop]: Abstraction has 183 states and 204 transitions. [2021-01-06 17:05:54,017 INFO L482 AbstractCegarLoop]: Interpolant automaton has 90 states. [2021-01-06 17:05:54,017 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 204 transitions. [2021-01-06 17:05:54,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2021-01-06 17:05:54,018 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:05:54,018 INFO L422 BasicCegarLoop]: trace histogram [88, 67, 21, 1, 1, 1, 1, 1, 1] [2021-01-06 17:05:54,225 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-01-06 17:05:54,226 INFO L429 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:05:54,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:05:54,226 INFO L82 PathProgramCache]: Analyzing trace with hash -285130077, now seen corresponding path program 64 times [2021-01-06 17:05:54,227 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:05:54,227 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049646322] [2021-01-06 17:05:54,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:05:54,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:05:57,420 INFO L134 CoverageAnalysis]: Checked inductivity of 7744 backedges. 2788 proven. 4556 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2021-01-06 17:05:57,420 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049646322] [2021-01-06 17:05:57,420 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2058797889] [2021-01-06 17:05:57,420 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 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:05:57,521 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 17:05:57,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:05:57,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 437 conjuncts, 69 conjunts are in the unsatisfiable core [2021-01-06 17:05:57,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:05:57,782 INFO L134 CoverageAnalysis]: Checked inductivity of 7744 backedges. 2788 proven. 4556 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2021-01-06 17:05:57,782 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:05:57,782 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 71 [2021-01-06 17:05:57,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255858219] [2021-01-06 17:05:57,783 INFO L461 AbstractCegarLoop]: Interpolant automaton has 71 states [2021-01-06 17:05:57,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:05:57,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2021-01-06 17:05:57,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2021-01-06 17:05:57,785 INFO L87 Difference]: Start difference. First operand 183 states and 204 transitions. Second operand 71 states. [2021-01-06 17:05:58,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:05:58,082 INFO L93 Difference]: Finished difference Result 232 states and 275 transitions. [2021-01-06 17:05:58,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-01-06 17:05:58,083 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 182 [2021-01-06 17:05:58,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:05:58,084 INFO L225 Difference]: With dead ends: 232 [2021-01-06 17:05:58,084 INFO L226 Difference]: Without dead ends: 185 [2021-01-06 17:05:58,085 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2021-01-06 17:05:58,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2021-01-06 17:05:58,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 185. [2021-01-06 17:05:58,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2021-01-06 17:05:58,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 206 transitions. [2021-01-06 17:05:58,091 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 206 transitions. Word has length 182 [2021-01-06 17:05:58,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:05:58,091 INFO L481 AbstractCegarLoop]: Abstraction has 185 states and 206 transitions. [2021-01-06 17:05:58,091 INFO L482 AbstractCegarLoop]: Interpolant automaton has 71 states. [2021-01-06 17:05:58,091 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 206 transitions. [2021-01-06 17:05:58,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2021-01-06 17:05:58,092 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:05:58,093 INFO L422 BasicCegarLoop]: trace histogram [89, 68, 21, 1, 1, 1, 1, 1, 1] [2021-01-06 17:05:58,307 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-01-06 17:05:58,308 INFO L429 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:05:58,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:05:58,309 INFO L82 PathProgramCache]: Analyzing trace with hash 1273181126, now seen corresponding path program 65 times [2021-01-06 17:05:58,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:05:58,309 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099518714] [2021-01-06 17:05:58,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:05:58,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:06:01,568 INFO L134 CoverageAnalysis]: Checked inductivity of 7921 backedges. 2829 proven. 4692 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2021-01-06 17:06:01,568 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099518714] [2021-01-06 17:06:01,568 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [238435755] [2021-01-06 17:06:01,568 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 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:06:01,728 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 90 check-sat command(s) [2021-01-06 17:06:01,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:06:01,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 441 conjuncts, 70 conjunts are in the unsatisfiable core [2021-01-06 17:06:01,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:06:01,985 INFO L134 CoverageAnalysis]: Checked inductivity of 7921 backedges. 2829 proven. 4692 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2021-01-06 17:06:01,985 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:06:01,985 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 72 [2021-01-06 17:06:01,985 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092691622] [2021-01-06 17:06:01,986 INFO L461 AbstractCegarLoop]: Interpolant automaton has 72 states [2021-01-06 17:06:01,986 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:06:01,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2021-01-06 17:06:01,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2021-01-06 17:06:01,987 INFO L87 Difference]: Start difference. First operand 185 states and 206 transitions. Second operand 72 states. [2021-01-06 17:06:02,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:06:02,384 INFO L93 Difference]: Finished difference Result 234 states and 277 transitions. [2021-01-06 17:06:02,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-01-06 17:06:02,385 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 184 [2021-01-06 17:06:02,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:06:02,386 INFO L225 Difference]: With dead ends: 234 [2021-01-06 17:06:02,386 INFO L226 Difference]: Without dead ends: 187 [2021-01-06 17:06:02,387 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2021-01-06 17:06:02,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2021-01-06 17:06:02,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 187. [2021-01-06 17:06:02,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2021-01-06 17:06:02,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 208 transitions. [2021-01-06 17:06:02,392 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 208 transitions. Word has length 184 [2021-01-06 17:06:02,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:06:02,392 INFO L481 AbstractCegarLoop]: Abstraction has 187 states and 208 transitions. [2021-01-06 17:06:02,392 INFO L482 AbstractCegarLoop]: Interpolant automaton has 72 states. [2021-01-06 17:06:02,392 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 208 transitions. [2021-01-06 17:06:02,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2021-01-06 17:06:02,393 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:06:02,394 INFO L422 BasicCegarLoop]: trace histogram [90, 69, 21, 1, 1, 1, 1, 1, 1] [2021-01-06 17:06:02,607 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-01-06 17:06:02,608 INFO L429 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:06:02,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:06:02,608 INFO L82 PathProgramCache]: Analyzing trace with hash -133339095, now seen corresponding path program 66 times [2021-01-06 17:06:02,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:06:02,609 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719204051] [2021-01-06 17:06:02,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:06:02,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:06:05,937 INFO L134 CoverageAnalysis]: Checked inductivity of 8100 backedges. 2870 proven. 4830 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2021-01-06 17:06:05,938 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719204051] [2021-01-06 17:06:05,938 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1306337144] [2021-01-06 17:06:05,938 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 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:06:06,137 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 87 check-sat command(s) [2021-01-06 17:06:06,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:06:06,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 429 conjuncts, 24 conjunts are in the unsatisfiable core [2021-01-06 17:06:06,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:06:08,659 INFO L134 CoverageAnalysis]: Checked inductivity of 8100 backedges. 2967 proven. 441 refuted. 0 times theorem prover too weak. 4692 trivial. 0 not checked. [2021-01-06 17:06:08,660 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:06:08,660 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 24] total 94 [2021-01-06 17:06:08,660 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425036871] [2021-01-06 17:06:08,660 INFO L461 AbstractCegarLoop]: Interpolant automaton has 94 states [2021-01-06 17:06:08,660 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:06:08,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2021-01-06 17:06:08,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4371, Invalid=4371, Unknown=0, NotChecked=0, Total=8742 [2021-01-06 17:06:08,662 INFO L87 Difference]: Start difference. First operand 187 states and 208 transitions. Second operand 94 states. [2021-01-06 17:06:09,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:06:09,421 INFO L93 Difference]: Finished difference Result 239 states and 285 transitions. [2021-01-06 17:06:09,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2021-01-06 17:06:09,427 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 186 [2021-01-06 17:06:09,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:06:09,428 INFO L225 Difference]: With dead ends: 239 [2021-01-06 17:06:09,428 INFO L226 Difference]: Without dead ends: 192 [2021-01-06 17:06:09,428 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=4371, Invalid=4371, Unknown=0, NotChecked=0, Total=8742 [2021-01-06 17:06:09,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2021-01-06 17:06:09,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 191. [2021-01-06 17:06:09,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2021-01-06 17:06:09,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 213 transitions. [2021-01-06 17:06:09,433 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 213 transitions. Word has length 186 [2021-01-06 17:06:09,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:06:09,433 INFO L481 AbstractCegarLoop]: Abstraction has 191 states and 213 transitions. [2021-01-06 17:06:09,433 INFO L482 AbstractCegarLoop]: Interpolant automaton has 94 states. [2021-01-06 17:06:09,433 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 213 transitions. [2021-01-06 17:06:09,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-01-06 17:06:09,434 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:06:09,435 INFO L422 BasicCegarLoop]: trace histogram [92, 70, 22, 1, 1, 1, 1, 1, 1] [2021-01-06 17:06:09,647 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:06:09,648 INFO L429 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:06:09,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:06:09,648 INFO L82 PathProgramCache]: Analyzing trace with hash -1764513999, now seen corresponding path program 67 times [2021-01-06 17:06:09,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:06:09,649 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61191132] [2021-01-06 17:06:09,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:06:09,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:06:13,180 INFO L134 CoverageAnalysis]: Checked inductivity of 8464 backedges. 3053 proven. 4970 refuted. 0 times theorem prover too weak. 441 trivial. 0 not checked. [2021-01-06 17:06:13,180 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61191132] [2021-01-06 17:06:13,180 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1884789567] [2021-01-06 17:06:13,181 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 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:06:13,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:06:13,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 455 conjuncts, 72 conjunts are in the unsatisfiable core [2021-01-06 17:06:13,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:06:13,525 INFO L134 CoverageAnalysis]: Checked inductivity of 8464 backedges. 3053 proven. 4970 refuted. 0 times theorem prover too weak. 441 trivial. 0 not checked. [2021-01-06 17:06:13,525 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:06:13,526 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73] total 74 [2021-01-06 17:06:13,526 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465238592] [2021-01-06 17:06:13,526 INFO L461 AbstractCegarLoop]: Interpolant automaton has 74 states [2021-01-06 17:06:13,526 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:06:13,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2021-01-06 17:06:13,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2021-01-06 17:06:13,528 INFO L87 Difference]: Start difference. First operand 191 states and 213 transitions. Second operand 74 states. [2021-01-06 17:06:13,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:06:13,985 INFO L93 Difference]: Finished difference Result 242 states and 287 transitions. [2021-01-06 17:06:13,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-01-06 17:06:13,986 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 190 [2021-01-06 17:06:13,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:06:13,987 INFO L225 Difference]: With dead ends: 242 [2021-01-06 17:06:13,987 INFO L226 Difference]: Without dead ends: 193 [2021-01-06 17:06:13,988 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2021-01-06 17:06:13,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2021-01-06 17:06:13,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 193. [2021-01-06 17:06:13,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2021-01-06 17:06:13,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 215 transitions. [2021-01-06 17:06:13,993 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 215 transitions. Word has length 190 [2021-01-06 17:06:13,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:06:13,993 INFO L481 AbstractCegarLoop]: Abstraction has 193 states and 215 transitions. [2021-01-06 17:06:13,994 INFO L482 AbstractCegarLoop]: Interpolant automaton has 74 states. [2021-01-06 17:06:13,994 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 215 transitions. [2021-01-06 17:06:13,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2021-01-06 17:06:13,994 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:06:13,994 INFO L422 BasicCegarLoop]: trace histogram [93, 71, 22, 1, 1, 1, 1, 1, 1] [2021-01-06 17:06:14,195 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:06:14,195 INFO L429 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:06:14,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:06:14,196 INFO L82 PathProgramCache]: Analyzing trace with hash 881837396, now seen corresponding path program 68 times [2021-01-06 17:06:14,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:06:14,197 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812234115] [2021-01-06 17:06:14,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:06:14,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:06:17,923 INFO L134 CoverageAnalysis]: Checked inductivity of 8649 backedges. 3096 proven. 5112 refuted. 0 times theorem prover too weak. 441 trivial. 0 not checked. [2021-01-06 17:06:17,923 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812234115] [2021-01-06 17:06:17,923 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [188331505] [2021-01-06 17:06:17,923 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 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:06:18,028 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 17:06:18,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:06:18,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 459 conjuncts, 73 conjunts are in the unsatisfiable core [2021-01-06 17:06:18,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:06:18,293 INFO L134 CoverageAnalysis]: Checked inductivity of 8649 backedges. 3096 proven. 5112 refuted. 0 times theorem prover too weak. 441 trivial. 0 not checked. [2021-01-06 17:06:18,294 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:06:18,294 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74] total 75 [2021-01-06 17:06:18,294 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285698306] [2021-01-06 17:06:18,294 INFO L461 AbstractCegarLoop]: Interpolant automaton has 75 states [2021-01-06 17:06:18,294 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:06:18,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2021-01-06 17:06:18,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2021-01-06 17:06:18,295 INFO L87 Difference]: Start difference. First operand 193 states and 215 transitions. Second operand 75 states. [2021-01-06 17:06:18,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:06:18,764 INFO L93 Difference]: Finished difference Result 244 states and 289 transitions. [2021-01-06 17:06:18,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-01-06 17:06:18,765 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 192 [2021-01-06 17:06:18,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:06:18,767 INFO L225 Difference]: With dead ends: 244 [2021-01-06 17:06:18,767 INFO L226 Difference]: Without dead ends: 195 [2021-01-06 17:06:18,768 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2021-01-06 17:06:18,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2021-01-06 17:06:18,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 195. [2021-01-06 17:06:18,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2021-01-06 17:06:18,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 217 transitions. [2021-01-06 17:06:18,774 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 217 transitions. Word has length 192 [2021-01-06 17:06:18,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:06:18,774 INFO L481 AbstractCegarLoop]: Abstraction has 195 states and 217 transitions. [2021-01-06 17:06:18,774 INFO L482 AbstractCegarLoop]: Interpolant automaton has 75 states. [2021-01-06 17:06:18,774 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 217 transitions. [2021-01-06 17:06:18,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2021-01-06 17:06:18,775 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:06:18,775 INFO L422 BasicCegarLoop]: trace histogram [94, 72, 22, 1, 1, 1, 1, 1, 1] [2021-01-06 17:06:18,988 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:06:18,989 INFO L429 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:06:18,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:06:18,989 INFO L82 PathProgramCache]: Analyzing trace with hash 1404888759, now seen corresponding path program 69 times [2021-01-06 17:06:18,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:06:18,990 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445441258] [2021-01-06 17:06:18,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:06:19,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:06:22,748 INFO L134 CoverageAnalysis]: Checked inductivity of 8836 backedges. 3139 proven. 5256 refuted. 0 times theorem prover too weak. 441 trivial. 0 not checked. [2021-01-06 17:06:22,749 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445441258] [2021-01-06 17:06:22,749 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [366468810] [2021-01-06 17:06:22,749 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 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:06:22,865 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 46 check-sat command(s) [2021-01-06 17:06:22,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:06:22,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 25 conjunts are in the unsatisfiable core [2021-01-06 17:06:22,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:06:25,784 INFO L134 CoverageAnalysis]: Checked inductivity of 8836 backedges. 3240 proven. 484 refuted. 0 times theorem prover too weak. 5112 trivial. 0 not checked. [2021-01-06 17:06:25,784 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:06:25,785 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 25] total 98 [2021-01-06 17:06:25,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506013590] [2021-01-06 17:06:25,785 INFO L461 AbstractCegarLoop]: Interpolant automaton has 98 states [2021-01-06 17:06:25,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:06:25,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2021-01-06 17:06:25,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4753, Invalid=4753, Unknown=0, NotChecked=0, Total=9506 [2021-01-06 17:06:25,786 INFO L87 Difference]: Start difference. First operand 195 states and 217 transitions. Second operand 98 states. [2021-01-06 17:06:26,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:06:26,510 INFO L93 Difference]: Finished difference Result 249 states and 297 transitions. [2021-01-06 17:06:26,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2021-01-06 17:06:26,511 INFO L78 Accepts]: Start accepts. Automaton has 98 states. Word has length 194 [2021-01-06 17:06:26,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:06:26,512 INFO L225 Difference]: With dead ends: 249 [2021-01-06 17:06:26,512 INFO L226 Difference]: Without dead ends: 200 [2021-01-06 17:06:26,513 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=4753, Invalid=4753, Unknown=0, NotChecked=0, Total=9506 [2021-01-06 17:06:26,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-01-06 17:06:26,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 199. [2021-01-06 17:06:26,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2021-01-06 17:06:26,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 222 transitions. [2021-01-06 17:06:26,519 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 222 transitions. Word has length 194 [2021-01-06 17:06:26,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:06:26,519 INFO L481 AbstractCegarLoop]: Abstraction has 199 states and 222 transitions. [2021-01-06 17:06:26,519 INFO L482 AbstractCegarLoop]: Interpolant automaton has 98 states. [2021-01-06 17:06:26,520 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 222 transitions. [2021-01-06 17:06:26,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2021-01-06 17:06:26,521 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:06:26,521 INFO L422 BasicCegarLoop]: trace histogram [96, 73, 23, 1, 1, 1, 1, 1, 1] [2021-01-06 17:06:26,735 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable72 [2021-01-06 17:06:26,736 INFO L429 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:06:26,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:06:26,736 INFO L82 PathProgramCache]: Analyzing trace with hash -228448449, now seen corresponding path program 70 times [2021-01-06 17:06:26,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:06:26,737 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241874938] [2021-01-06 17:06:26,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:06:26,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:06:30,744 INFO L134 CoverageAnalysis]: Checked inductivity of 9216 backedges. 3330 proven. 5402 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2021-01-06 17:06:30,745 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241874938] [2021-01-06 17:06:30,745 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [964129722] [2021-01-06 17:06:30,745 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 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:06:30,856 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 17:06:30,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:06:30,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 473 conjuncts, 75 conjunts are in the unsatisfiable core [2021-01-06 17:06:30,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:06:31,169 INFO L134 CoverageAnalysis]: Checked inductivity of 9216 backedges. 3330 proven. 5402 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2021-01-06 17:06:31,169 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:06:31,169 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76] total 77 [2021-01-06 17:06:31,170 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990946229] [2021-01-06 17:06:31,170 INFO L461 AbstractCegarLoop]: Interpolant automaton has 77 states [2021-01-06 17:06:31,170 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:06:31,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2021-01-06 17:06:31,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2021-01-06 17:06:31,172 INFO L87 Difference]: Start difference. First operand 199 states and 222 transitions. Second operand 77 states. [2021-01-06 17:06:31,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:06:31,581 INFO L93 Difference]: Finished difference Result 252 states and 299 transitions. [2021-01-06 17:06:31,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-01-06 17:06:31,582 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 198 [2021-01-06 17:06:31,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:06:31,583 INFO L225 Difference]: With dead ends: 252 [2021-01-06 17:06:31,584 INFO L226 Difference]: Without dead ends: 201 [2021-01-06 17:06:31,584 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 198 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2021-01-06 17:06:31,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2021-01-06 17:06:31,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 201. [2021-01-06 17:06:31,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 201 states. [2021-01-06 17:06:31,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 224 transitions. [2021-01-06 17:06:31,589 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 224 transitions. Word has length 198 [2021-01-06 17:06:31,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:06:31,589 INFO L481 AbstractCegarLoop]: Abstraction has 201 states and 224 transitions. [2021-01-06 17:06:31,589 INFO L482 AbstractCegarLoop]: Interpolant automaton has 77 states. [2021-01-06 17:06:31,589 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 224 transitions. [2021-01-06 17:06:31,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2021-01-06 17:06:31,590 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:06:31,591 INFO L422 BasicCegarLoop]: trace histogram [97, 74, 23, 1, 1, 1, 1, 1, 1] [2021-01-06 17:06:31,804 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:06:31,805 INFO L429 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:06:31,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:06:31,806 INFO L82 PathProgramCache]: Analyzing trace with hash 1585148514, now seen corresponding path program 71 times [2021-01-06 17:06:31,806 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:06:31,807 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650986176] [2021-01-06 17:06:31,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:06:31,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:06:35,887 INFO L134 CoverageAnalysis]: Checked inductivity of 9409 backedges. 3375 proven. 5550 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2021-01-06 17:06:35,888 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650986176] [2021-01-06 17:06:35,888 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [489618527] [2021-01-06 17:06:35,888 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 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:06:36,059 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 98 check-sat command(s) [2021-01-06 17:06:36,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:06:36,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 477 conjuncts, 76 conjunts are in the unsatisfiable core [2021-01-06 17:06:36,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:06:36,326 INFO L134 CoverageAnalysis]: Checked inductivity of 9409 backedges. 3375 proven. 5550 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2021-01-06 17:06:36,326 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:06:36,326 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77] total 78 [2021-01-06 17:06:36,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549823353] [2021-01-06 17:06:36,327 INFO L461 AbstractCegarLoop]: Interpolant automaton has 78 states [2021-01-06 17:06:36,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:06:36,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2021-01-06 17:06:36,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2021-01-06 17:06:36,328 INFO L87 Difference]: Start difference. First operand 201 states and 224 transitions. Second operand 78 states. [2021-01-06 17:06:36,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:06:36,836 INFO L93 Difference]: Finished difference Result 254 states and 301 transitions. [2021-01-06 17:06:36,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-01-06 17:06:36,836 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 200 [2021-01-06 17:06:36,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:06:36,838 INFO L225 Difference]: With dead ends: 254 [2021-01-06 17:06:36,838 INFO L226 Difference]: Without dead ends: 203 [2021-01-06 17:06:36,838 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2021-01-06 17:06:36,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2021-01-06 17:06:36,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 203. [2021-01-06 17:06:36,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2021-01-06 17:06:36,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 226 transitions. [2021-01-06 17:06:36,845 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 226 transitions. Word has length 200 [2021-01-06 17:06:36,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:06:36,845 INFO L481 AbstractCegarLoop]: Abstraction has 203 states and 226 transitions. [2021-01-06 17:06:36,845 INFO L482 AbstractCegarLoop]: Interpolant automaton has 78 states. [2021-01-06 17:06:36,845 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 226 transitions. [2021-01-06 17:06:36,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2021-01-06 17:06:36,846 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:06:36,846 INFO L422 BasicCegarLoop]: trace histogram [98, 75, 23, 1, 1, 1, 1, 1, 1] [2021-01-06 17:06:37,061 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:06:37,061 INFO L429 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:06:37,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:06:37,062 INFO L82 PathProgramCache]: Analyzing trace with hash 695107781, now seen corresponding path program 72 times [2021-01-06 17:06:37,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:06:37,062 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852425782] [2021-01-06 17:06:37,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:06:37,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:06:41,269 INFO L134 CoverageAnalysis]: Checked inductivity of 9604 backedges. 3420 proven. 5700 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2021-01-06 17:06:41,269 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852425782] [2021-01-06 17:06:41,270 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [715008250] [2021-01-06 17:06:41,270 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:06:41,486 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 95 check-sat command(s) [2021-01-06 17:06:41,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:06:41,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 26 conjunts are in the unsatisfiable core [2021-01-06 17:06:41,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:06:44,720 INFO L134 CoverageAnalysis]: Checked inductivity of 9604 backedges. 3525 proven. 529 refuted. 0 times theorem prover too weak. 5550 trivial. 0 not checked. [2021-01-06 17:06:44,720 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:06:44,720 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 26] total 102 [2021-01-06 17:06:44,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357792797] [2021-01-06 17:06:44,721 INFO L461 AbstractCegarLoop]: Interpolant automaton has 102 states [2021-01-06 17:06:44,721 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:06:44,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2021-01-06 17:06:44,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2021-01-06 17:06:44,722 INFO L87 Difference]: Start difference. First operand 203 states and 226 transitions. Second operand 102 states. [2021-01-06 17:06:45,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:06:45,447 INFO L93 Difference]: Finished difference Result 259 states and 309 transitions. [2021-01-06 17:06:45,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2021-01-06 17:06:45,448 INFO L78 Accepts]: Start accepts. Automaton has 102 states. Word has length 202 [2021-01-06 17:06:45,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:06:45,449 INFO L225 Difference]: With dead ends: 259 [2021-01-06 17:06:45,449 INFO L226 Difference]: Without dead ends: 208 [2021-01-06 17:06:45,450 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 179 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2021-01-06 17:06:45,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-01-06 17:06:45,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 207. [2021-01-06 17:06:45,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 207 states. [2021-01-06 17:06:45,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 231 transitions. [2021-01-06 17:06:45,455 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 231 transitions. Word has length 202 [2021-01-06 17:06:45,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:06:45,455 INFO L481 AbstractCegarLoop]: Abstraction has 207 states and 231 transitions. [2021-01-06 17:06:45,455 INFO L482 AbstractCegarLoop]: Interpolant automaton has 102 states. [2021-01-06 17:06:45,455 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 231 transitions. [2021-01-06 17:06:45,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2021-01-06 17:06:45,462 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:06:45,462 INFO L422 BasicCegarLoop]: trace histogram [100, 76, 24, 1, 1, 1, 1, 1, 1] [2021-01-06 17:06:45,677 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:06:45,678 INFO L429 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:06:45,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:06:45,678 INFO L82 PathProgramCache]: Analyzing trace with hash 1864164045, now seen corresponding path program 73 times [2021-01-06 17:06:45,679 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:06:45,679 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031414587] [2021-01-06 17:06:45,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:06:45,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:06:49,983 INFO L134 CoverageAnalysis]: Checked inductivity of 10000 backedges. 3619 proven. 5852 refuted. 0 times theorem prover too weak. 529 trivial. 0 not checked. [2021-01-06 17:06:49,984 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031414587] [2021-01-06 17:06:49,984 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1464463898] [2021-01-06 17:06:49,984 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 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:06:50,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:06:50,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 491 conjuncts, 78 conjunts are in the unsatisfiable core [2021-01-06 17:06:50,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:06:50,357 INFO L134 CoverageAnalysis]: Checked inductivity of 10000 backedges. 3619 proven. 5852 refuted. 0 times theorem prover too weak. 529 trivial. 0 not checked. [2021-01-06 17:06:50,358 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:06:50,358 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 79] total 80 [2021-01-06 17:06:50,358 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731262742] [2021-01-06 17:06:50,358 INFO L461 AbstractCegarLoop]: Interpolant automaton has 80 states [2021-01-06 17:06:50,358 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:06:50,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2021-01-06 17:06:50,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320 [2021-01-06 17:06:50,359 INFO L87 Difference]: Start difference. First operand 207 states and 231 transitions. Second operand 80 states. [2021-01-06 17:06:50,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:06:50,825 INFO L93 Difference]: Finished difference Result 262 states and 311 transitions. [2021-01-06 17:06:50,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-01-06 17:06:50,826 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 206 [2021-01-06 17:06:50,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:06:50,828 INFO L225 Difference]: With dead ends: 262 [2021-01-06 17:06:50,828 INFO L226 Difference]: Without dead ends: 209 [2021-01-06 17:06:50,829 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 206 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320 [2021-01-06 17:06:50,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2021-01-06 17:06:50,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 209. [2021-01-06 17:06:50,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 209 states. [2021-01-06 17:06:50,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 233 transitions. [2021-01-06 17:06:50,833 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 233 transitions. Word has length 206 [2021-01-06 17:06:50,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:06:50,833 INFO L481 AbstractCegarLoop]: Abstraction has 209 states and 233 transitions. [2021-01-06 17:06:50,833 INFO L482 AbstractCegarLoop]: Interpolant automaton has 80 states. [2021-01-06 17:06:50,833 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 233 transitions. [2021-01-06 17:06:50,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2021-01-06 17:06:50,834 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:06:50,835 INFO L422 BasicCegarLoop]: trace histogram [101, 77, 24, 1, 1, 1, 1, 1, 1] [2021-01-06 17:06:51,040 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2021-01-06 17:06:51,041 INFO L429 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:06:51,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:06:51,042 INFO L82 PathProgramCache]: Analyzing trace with hash 68573936, now seen corresponding path program 74 times [2021-01-06 17:06:51,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:06:51,042 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442014407] [2021-01-06 17:06:51,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:06:51,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:06:55,529 INFO L134 CoverageAnalysis]: Checked inductivity of 10201 backedges. 3666 proven. 6006 refuted. 0 times theorem prover too weak. 529 trivial. 0 not checked. [2021-01-06 17:06:55,529 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442014407] [2021-01-06 17:06:55,530 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1366957378] [2021-01-06 17:06:55,530 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 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:06:55,641 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 17:06:55,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:06:55,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 495 conjuncts, 79 conjunts are in the unsatisfiable core [2021-01-06 17:06:55,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:06:55,887 INFO L134 CoverageAnalysis]: Checked inductivity of 10201 backedges. 3666 proven. 6006 refuted. 0 times theorem prover too weak. 529 trivial. 0 not checked. [2021-01-06 17:06:55,888 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:06:55,888 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 80] total 81 [2021-01-06 17:06:55,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318222256] [2021-01-06 17:06:55,888 INFO L461 AbstractCegarLoop]: Interpolant automaton has 81 states [2021-01-06 17:06:55,888 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:06:55,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2021-01-06 17:06:55,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2021-01-06 17:06:55,890 INFO L87 Difference]: Start difference. First operand 209 states and 233 transitions. Second operand 81 states. [2021-01-06 17:06:56,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:06:56,313 INFO L93 Difference]: Finished difference Result 264 states and 313 transitions. [2021-01-06 17:06:56,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-01-06 17:06:56,314 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 208 [2021-01-06 17:06:56,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:06:56,315 INFO L225 Difference]: With dead ends: 264 [2021-01-06 17:06:56,315 INFO L226 Difference]: Without dead ends: 211 [2021-01-06 17:06:56,316 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 208 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2021-01-06 17:06:56,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2021-01-06 17:06:56,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 211. [2021-01-06 17:06:56,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 211 states. [2021-01-06 17:06:56,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 235 transitions. [2021-01-06 17:06:56,322 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 235 transitions. Word has length 208 [2021-01-06 17:06:56,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:06:56,323 INFO L481 AbstractCegarLoop]: Abstraction has 211 states and 235 transitions. [2021-01-06 17:06:56,323 INFO L482 AbstractCegarLoop]: Interpolant automaton has 81 states. [2021-01-06 17:06:56,323 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 235 transitions. [2021-01-06 17:06:56,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2021-01-06 17:06:56,324 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:06:56,324 INFO L422 BasicCegarLoop]: trace histogram [102, 78, 24, 1, 1, 1, 1, 1, 1] [2021-01-06 17:06:56,539 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:06:56,540 INFO L429 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:06:56,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:06:56,540 INFO L82 PathProgramCache]: Analyzing trace with hash 1083332179, now seen corresponding path program 75 times [2021-01-06 17:06:56,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:06:56,541 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586622439] [2021-01-06 17:06:56,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:06:56,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:07:01,146 INFO L134 CoverageAnalysis]: Checked inductivity of 10404 backedges. 3713 proven. 6162 refuted. 0 times theorem prover too weak. 529 trivial. 0 not checked. [2021-01-06 17:07:01,146 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586622439] [2021-01-06 17:07:01,146 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1417021307] [2021-01-06 17:07:01,146 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 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:07:01,275 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 50 check-sat command(s) [2021-01-06 17:07:01,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:07:01,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 27 conjunts are in the unsatisfiable core [2021-01-06 17:07:01,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:07:04,835 INFO L134 CoverageAnalysis]: Checked inductivity of 10404 backedges. 3822 proven. 576 refuted. 0 times theorem prover too weak. 6006 trivial. 0 not checked. [2021-01-06 17:07:04,835 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:07:04,835 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 27] total 106 [2021-01-06 17:07:04,836 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724869920] [2021-01-06 17:07:04,836 INFO L461 AbstractCegarLoop]: Interpolant automaton has 106 states [2021-01-06 17:07:04,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:07:04,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2021-01-06 17:07:04,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5565, Invalid=5565, Unknown=0, NotChecked=0, Total=11130 [2021-01-06 17:07:04,838 INFO L87 Difference]: Start difference. First operand 211 states and 235 transitions. Second operand 106 states. [2021-01-06 17:07:05,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:07:05,594 INFO L93 Difference]: Finished difference Result 269 states and 321 transitions. [2021-01-06 17:07:05,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2021-01-06 17:07:05,595 INFO L78 Accepts]: Start accepts. Automaton has 106 states. Word has length 210 [2021-01-06 17:07:05,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:07:05,596 INFO L225 Difference]: With dead ends: 269 [2021-01-06 17:07:05,596 INFO L226 Difference]: Without dead ends: 216 [2021-01-06 17:07:05,597 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=5565, Invalid=5565, Unknown=0, NotChecked=0, Total=11130 [2021-01-06 17:07:05,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2021-01-06 17:07:05,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 215. [2021-01-06 17:07:05,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 215 states. [2021-01-06 17:07:05,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 240 transitions. [2021-01-06 17:07:05,602 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 240 transitions. Word has length 210 [2021-01-06 17:07:05,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:07:05,602 INFO L481 AbstractCegarLoop]: Abstraction has 215 states and 240 transitions. [2021-01-06 17:07:05,602 INFO L482 AbstractCegarLoop]: Interpolant automaton has 106 states. [2021-01-06 17:07:05,603 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 240 transitions. [2021-01-06 17:07:05,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2021-01-06 17:07:05,604 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:07:05,604 INFO L422 BasicCegarLoop]: trace histogram [104, 79, 25, 1, 1, 1, 1, 1, 1] [2021-01-06 17:07:05,818 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:07:05,819 INFO L429 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:07:05,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:07:05,819 INFO L82 PathProgramCache]: Analyzing trace with hash -974390821, now seen corresponding path program 76 times [2021-01-06 17:07:05,820 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:07:05,820 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421843259] [2021-01-06 17:07:05,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:07:05,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:07:10,632 INFO L134 CoverageAnalysis]: Checked inductivity of 10816 backedges. 3920 proven. 6320 refuted. 0 times theorem prover too weak. 576 trivial. 0 not checked. [2021-01-06 17:07:10,632 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421843259] [2021-01-06 17:07:10,632 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [387919612] [2021-01-06 17:07:10,633 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 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:07:10,746 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 17:07:10,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:07:10,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 509 conjuncts, 81 conjunts are in the unsatisfiable core [2021-01-06 17:07:10,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:07:11,010 INFO L134 CoverageAnalysis]: Checked inductivity of 10816 backedges. 3920 proven. 6320 refuted. 0 times theorem prover too weak. 576 trivial. 0 not checked. [2021-01-06 17:07:11,010 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:07:11,010 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 82] total 83 [2021-01-06 17:07:11,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400425987] [2021-01-06 17:07:11,011 INFO L461 AbstractCegarLoop]: Interpolant automaton has 83 states [2021-01-06 17:07:11,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:07:11,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2021-01-06 17:07:11,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3403, Invalid=3403, Unknown=0, NotChecked=0, Total=6806 [2021-01-06 17:07:11,012 INFO L87 Difference]: Start difference. First operand 215 states and 240 transitions. Second operand 83 states. [2021-01-06 17:07:11,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:07:11,587 INFO L93 Difference]: Finished difference Result 272 states and 323 transitions. [2021-01-06 17:07:11,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-01-06 17:07:11,588 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 214 [2021-01-06 17:07:11,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:07:11,589 INFO L225 Difference]: With dead ends: 272 [2021-01-06 17:07:11,589 INFO L226 Difference]: Without dead ends: 217 [2021-01-06 17:07:11,589 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 295 GetRequests, 214 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=3403, Invalid=3403, Unknown=0, NotChecked=0, Total=6806 [2021-01-06 17:07:11,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2021-01-06 17:07:11,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 217. [2021-01-06 17:07:11,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 217 states. [2021-01-06 17:07:11,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 242 transitions. [2021-01-06 17:07:11,593 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 242 transitions. Word has length 214 [2021-01-06 17:07:11,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:07:11,593 INFO L481 AbstractCegarLoop]: Abstraction has 217 states and 242 transitions. [2021-01-06 17:07:11,593 INFO L482 AbstractCegarLoop]: Interpolant automaton has 83 states. [2021-01-06 17:07:11,593 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 242 transitions. [2021-01-06 17:07:11,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2021-01-06 17:07:11,594 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:07:11,595 INFO L422 BasicCegarLoop]: trace histogram [105, 80, 25, 1, 1, 1, 1, 1, 1] [2021-01-06 17:07:11,808 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-01-06 17:07:11,809 INFO L429 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:07:11,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:07:11,809 INFO L82 PathProgramCache]: Analyzing trace with hash -1421304066, now seen corresponding path program 77 times [2021-01-06 17:07:11,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:07:11,810 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793549795] [2021-01-06 17:07:11,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:07:11,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:07:16,655 INFO L134 CoverageAnalysis]: Checked inductivity of 11025 backedges. 3969 proven. 6480 refuted. 0 times theorem prover too weak. 576 trivial. 0 not checked. [2021-01-06 17:07:16,655 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793549795] [2021-01-06 17:07:16,655 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1241124609] [2021-01-06 17:07:16,655 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 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:07:16,848 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 106 check-sat command(s) [2021-01-06 17:07:16,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:07:16,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 513 conjuncts, 82 conjunts are in the unsatisfiable core [2021-01-06 17:07:16,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:07:17,111 INFO L134 CoverageAnalysis]: Checked inductivity of 11025 backedges. 3969 proven. 6480 refuted. 0 times theorem prover too weak. 576 trivial. 0 not checked. [2021-01-06 17:07:17,111 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:07:17,112 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 83] total 84 [2021-01-06 17:07:17,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406263818] [2021-01-06 17:07:17,112 INFO L461 AbstractCegarLoop]: Interpolant automaton has 84 states [2021-01-06 17:07:17,112 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:07:17,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2021-01-06 17:07:17,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3486, Invalid=3486, Unknown=0, NotChecked=0, Total=6972 [2021-01-06 17:07:17,113 INFO L87 Difference]: Start difference. First operand 217 states and 242 transitions. Second operand 84 states. [2021-01-06 17:07:17,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:07:17,664 INFO L93 Difference]: Finished difference Result 274 states and 325 transitions. [2021-01-06 17:07:17,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-01-06 17:07:17,665 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 216 [2021-01-06 17:07:17,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:07:17,673 INFO L225 Difference]: With dead ends: 274 [2021-01-06 17:07:17,673 INFO L226 Difference]: Without dead ends: 219 [2021-01-06 17:07:17,674 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 216 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=3486, Invalid=3486, Unknown=0, NotChecked=0, Total=6972 [2021-01-06 17:07:17,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2021-01-06 17:07:17,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 219. [2021-01-06 17:07:17,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 219 states. [2021-01-06 17:07:17,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 244 transitions. [2021-01-06 17:07:17,678 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 244 transitions. Word has length 216 [2021-01-06 17:07:17,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:07:17,678 INFO L481 AbstractCegarLoop]: Abstraction has 219 states and 244 transitions. [2021-01-06 17:07:17,678 INFO L482 AbstractCegarLoop]: Interpolant automaton has 84 states. [2021-01-06 17:07:17,678 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 244 transitions. [2021-01-06 17:07:17,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2021-01-06 17:07:17,679 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:07:17,679 INFO L422 BasicCegarLoop]: trace histogram [106, 81, 25, 1, 1, 1, 1, 1, 1] [2021-01-06 17:07:17,879 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:07:17,880 INFO L429 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:07:17,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:07:17,881 INFO L82 PathProgramCache]: Analyzing trace with hash -1408202911, now seen corresponding path program 78 times [2021-01-06 17:07:17,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:07:17,881 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701069950] [2021-01-06 17:07:17,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:07:17,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:07:22,881 INFO L134 CoverageAnalysis]: Checked inductivity of 11236 backedges. 4018 proven. 6642 refuted. 0 times theorem prover too weak. 576 trivial. 0 not checked. [2021-01-06 17:07:22,881 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701069950] [2021-01-06 17:07:22,882 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1392240336] [2021-01-06 17:07:22,882 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 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:07:23,125 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 103 check-sat command(s) [2021-01-06 17:07:23,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:07:23,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 501 conjuncts, 28 conjunts are in the unsatisfiable core [2021-01-06 17:07:23,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:07:27,039 INFO L134 CoverageAnalysis]: Checked inductivity of 11236 backedges. 4131 proven. 625 refuted. 0 times theorem prover too weak. 6480 trivial. 0 not checked. [2021-01-06 17:07:27,040 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:07:27,040 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [84, 28] total 110 [2021-01-06 17:07:27,040 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392775542] [2021-01-06 17:07:27,041 INFO L461 AbstractCegarLoop]: Interpolant automaton has 110 states [2021-01-06 17:07:27,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:07:27,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2021-01-06 17:07:27,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5995, Invalid=5995, Unknown=0, NotChecked=0, Total=11990 [2021-01-06 17:07:27,042 INFO L87 Difference]: Start difference. First operand 219 states and 244 transitions. Second operand 110 states. [2021-01-06 17:07:28,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:07:28,018 INFO L93 Difference]: Finished difference Result 279 states and 333 transitions. [2021-01-06 17:07:28,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2021-01-06 17:07:28,018 INFO L78 Accepts]: Start accepts. Automaton has 110 states. Word has length 218 [2021-01-06 17:07:28,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:07:28,019 INFO L225 Difference]: With dead ends: 279 [2021-01-06 17:07:28,019 INFO L226 Difference]: Without dead ends: 224 [2021-01-06 17:07:28,020 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 193 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=5995, Invalid=5995, Unknown=0, NotChecked=0, Total=11990 [2021-01-06 17:07:28,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2021-01-06 17:07:28,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 223. [2021-01-06 17:07:28,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 223 states. [2021-01-06 17:07:28,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 249 transitions. [2021-01-06 17:07:28,024 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 249 transitions. Word has length 218 [2021-01-06 17:07:28,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:07:28,024 INFO L481 AbstractCegarLoop]: Abstraction has 223 states and 249 transitions. [2021-01-06 17:07:28,024 INFO L482 AbstractCegarLoop]: Interpolant automaton has 110 states. [2021-01-06 17:07:28,024 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 249 transitions. [2021-01-06 17:07:28,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2021-01-06 17:07:28,025 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:07:28,025 INFO L422 BasicCegarLoop]: trace histogram [108, 82, 26, 1, 1, 1, 1, 1, 1] [2021-01-06 17:07:28,239 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:07:28,239 INFO L429 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:07:28,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:07:28,240 INFO L82 PathProgramCache]: Analyzing trace with hash -47215511, now seen corresponding path program 79 times [2021-01-06 17:07:28,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:07:28,241 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561450165] [2021-01-06 17:07:28,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:07:28,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:07:33,438 INFO L134 CoverageAnalysis]: Checked inductivity of 11664 backedges. 4233 proven. 6806 refuted. 0 times theorem prover too weak. 625 trivial. 0 not checked. [2021-01-06 17:07:33,439 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561450165] [2021-01-06 17:07:33,439 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1786770453] [2021-01-06 17:07:33,439 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 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:07:33,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:07:33,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 527 conjuncts, 84 conjunts are in the unsatisfiable core [2021-01-06 17:07:33,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:07:33,842 INFO L134 CoverageAnalysis]: Checked inductivity of 11664 backedges. 4233 proven. 6806 refuted. 0 times theorem prover too weak. 625 trivial. 0 not checked. [2021-01-06 17:07:33,842 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:07:33,843 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 85] total 86 [2021-01-06 17:07:33,843 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880006364] [2021-01-06 17:07:33,843 INFO L461 AbstractCegarLoop]: Interpolant automaton has 86 states [2021-01-06 17:07:33,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:07:33,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2021-01-06 17:07:33,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3655, Invalid=3655, Unknown=0, NotChecked=0, Total=7310 [2021-01-06 17:07:33,844 INFO L87 Difference]: Start difference. First operand 223 states and 249 transitions. Second operand 86 states. [2021-01-06 17:07:34,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:07:34,262 INFO L93 Difference]: Finished difference Result 282 states and 335 transitions. [2021-01-06 17:07:34,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2021-01-06 17:07:34,263 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 222 [2021-01-06 17:07:34,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:07:34,265 INFO L225 Difference]: With dead ends: 282 [2021-01-06 17:07:34,265 INFO L226 Difference]: Without dead ends: 225 [2021-01-06 17:07:34,266 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 306 GetRequests, 222 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=3655, Invalid=3655, Unknown=0, NotChecked=0, Total=7310 [2021-01-06 17:07:34,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2021-01-06 17:07:34,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 225. [2021-01-06 17:07:34,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 225 states. [2021-01-06 17:07:34,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 251 transitions. [2021-01-06 17:07:34,271 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 251 transitions. Word has length 222 [2021-01-06 17:07:34,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:07:34,271 INFO L481 AbstractCegarLoop]: Abstraction has 225 states and 251 transitions. [2021-01-06 17:07:34,272 INFO L482 AbstractCegarLoop]: Interpolant automaton has 86 states. [2021-01-06 17:07:34,272 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 251 transitions. [2021-01-06 17:07:34,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2021-01-06 17:07:34,273 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:07:34,273 INFO L422 BasicCegarLoop]: trace histogram [109, 83, 26, 1, 1, 1, 1, 1, 1] [2021-01-06 17:07:34,486 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:07:34,487 INFO L429 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:07:34,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:07:34,487 INFO L82 PathProgramCache]: Analyzing trace with hash 661806732, now seen corresponding path program 80 times [2021-01-06 17:07:34,488 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:07:34,488 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847241710] [2021-01-06 17:07:34,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:07:34,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:07:39,820 INFO L134 CoverageAnalysis]: Checked inductivity of 11881 backedges. 4284 proven. 6972 refuted. 0 times theorem prover too weak. 625 trivial. 0 not checked. [2021-01-06 17:07:39,820 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847241710] [2021-01-06 17:07:39,820 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1889432343] [2021-01-06 17:07:39,820 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 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:07:39,938 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 17:07:39,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:07:39,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 531 conjuncts, 85 conjunts are in the unsatisfiable core [2021-01-06 17:07:39,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:07:40,199 INFO L134 CoverageAnalysis]: Checked inductivity of 11881 backedges. 4284 proven. 6972 refuted. 0 times theorem prover too weak. 625 trivial. 0 not checked. [2021-01-06 17:07:40,199 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:07:40,199 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [86, 86] total 87 [2021-01-06 17:07:40,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925943414] [2021-01-06 17:07:40,200 INFO L461 AbstractCegarLoop]: Interpolant automaton has 87 states [2021-01-06 17:07:40,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:07:40,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2021-01-06 17:07:40,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3741, Invalid=3741, Unknown=0, NotChecked=0, Total=7482 [2021-01-06 17:07:40,206 INFO L87 Difference]: Start difference. First operand 225 states and 251 transitions. Second operand 87 states. [2021-01-06 17:07:40,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:07:40,804 INFO L93 Difference]: Finished difference Result 284 states and 337 transitions. [2021-01-06 17:07:40,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-01-06 17:07:40,805 INFO L78 Accepts]: Start accepts. Automaton has 87 states. Word has length 224 [2021-01-06 17:07:40,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:07:40,806 INFO L225 Difference]: With dead ends: 284 [2021-01-06 17:07:40,807 INFO L226 Difference]: Without dead ends: 227 [2021-01-06 17:07:40,807 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 309 GetRequests, 224 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=3741, Invalid=3741, Unknown=0, NotChecked=0, Total=7482 [2021-01-06 17:07:40,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2021-01-06 17:07:40,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 227. [2021-01-06 17:07:40,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 227 states. [2021-01-06 17:07:40,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 253 transitions. [2021-01-06 17:07:40,812 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 253 transitions. Word has length 224 [2021-01-06 17:07:40,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:07:40,813 INFO L481 AbstractCegarLoop]: Abstraction has 227 states and 253 transitions. [2021-01-06 17:07:40,813 INFO L482 AbstractCegarLoop]: Interpolant automaton has 87 states. [2021-01-06 17:07:40,813 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 253 transitions. [2021-01-06 17:07:40,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2021-01-06 17:07:40,814 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:07:40,814 INFO L422 BasicCegarLoop]: trace histogram [110, 84, 26, 1, 1, 1, 1, 1, 1] [2021-01-06 17:07:41,027 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:07:41,028 INFO L429 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:07:41,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:07:41,028 INFO L82 PathProgramCache]: Analyzing trace with hash -867617809, now seen corresponding path program 81 times [2021-01-06 17:07:41,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:07:41,029 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791453111] [2021-01-06 17:07:41,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:07:41,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat