/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/recursive-simple/sum_25x0-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 07:04:21,136 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 07:04:21,139 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 07:04:21,181 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 07:04:21,182 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 07:04:21,186 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 07:04:21,190 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 07:04:21,198 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 07:04:21,202 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 07:04:21,208 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 07:04:21,210 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 07:04:21,212 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 07:04:21,212 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 07:04:21,215 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 07:04:21,218 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 07:04:21,220 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 07:04:21,241 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 07:04:21,245 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 07:04:21,253 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 07:04:21,261 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 07:04:21,263 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 07:04:21,266 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 07:04:21,267 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 07:04:21,270 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 07:04:21,280 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 07:04:21,285 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 07:04:21,286 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 07:04:21,288 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 07:04:21,289 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 07:04:21,290 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 07:04:21,290 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 07:04:21,291 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 07:04:21,291 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 07:04:21,292 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 07:04:21,293 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 07:04:21,293 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 07:04:21,294 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 07:04:21,353 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 07:04:21,353 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 07:04:21,357 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 07:04:21,358 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 07:04:21,358 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 07:04:21,358 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 07:04:21,358 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 07:04:21,359 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 07:04:21,359 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 07:04:21,360 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 07:04:21,361 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 07:04:21,361 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 07:04:21,361 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 07:04:21,362 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 07:04:21,362 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 07:04:21,362 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 07:04:21,362 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 07:04:21,363 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 07:04:21,363 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 07:04:21,363 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 07:04:21,364 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 07:04:21,364 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 07:04:21,364 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 07:04:21,365 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 07:04:21,365 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 07:04:21,365 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/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 07:04:21,763 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 07:04:21,787 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 07:04:21,790 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 07:04:21,791 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 07:04:21,792 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 07:04:21,793 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive-simple/sum_25x0-1.c [2020-12-22 07:04:21,881 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dd08ce96d/3d738b647baa4e0c96513ae8b6d1e267/FLAG68afb65bb [2020-12-22 07:04:22,508 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 07:04:22,509 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive-simple/sum_25x0-1.c [2020-12-22 07:04:22,516 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dd08ce96d/3d738b647baa4e0c96513ae8b6d1e267/FLAG68afb65bb [2020-12-22 07:04:22,872 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dd08ce96d/3d738b647baa4e0c96513ae8b6d1e267 [2020-12-22 07:04:22,875 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 07:04:22,877 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 07:04:22,882 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 07:04:22,882 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 07:04:22,886 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 07:04:22,886 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:04:22" (1/1) ... [2020-12-22 07:04:22,889 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2502a3c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:04:22, skipping insertion in model container [2020-12-22 07:04:22,889 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:04:22" (1/1) ... [2020-12-22 07:04:22,897 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 07:04:22,912 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 07:04:23,061 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive-simple/sum_25x0-1.c[481,494] [2020-12-22 07:04:23,064 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 07:04:23,074 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 07:04:23,090 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive-simple/sum_25x0-1.c[481,494] [2020-12-22 07:04:23,091 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 07:04:23,105 INFO L208 MainTranslator]: Completed translation [2020-12-22 07:04:23,106 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:04:23 WrapperNode [2020-12-22 07:04:23,106 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 07:04:23,107 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 07:04:23,107 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 07:04:23,108 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 07:04:23,115 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:04:23" (1/1) ... [2020-12-22 07:04:23,122 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:04:23" (1/1) ... [2020-12-22 07:04:23,139 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 07:04:23,140 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 07:04:23,140 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 07:04:23,140 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 07:04:23,149 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:04:23" (1/1) ... [2020-12-22 07:04:23,149 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:04:23" (1/1) ... [2020-12-22 07:04:23,151 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:04:23" (1/1) ... [2020-12-22 07:04:23,151 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:04:23" (1/1) ... [2020-12-22 07:04:23,154 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:04:23" (1/1) ... [2020-12-22 07:04:23,156 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:04:23" (1/1) ... [2020-12-22 07:04:23,157 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:04:23" (1/1) ... [2020-12-22 07:04:23,159 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 07:04:23,160 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 07:04:23,160 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 07:04:23,160 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 07:04:23,161 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:04:23" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 07:04:23,260 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 07:04:23,261 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 07:04:23,261 INFO L130 BoogieDeclarations]: Found specification of procedure sum [2020-12-22 07:04:23,261 INFO L138 BoogieDeclarations]: Found implementation of procedure sum [2020-12-22 07:04:23,261 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 07:04:23,262 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 07:04:23,469 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 07:04:23,470 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2020-12-22 07:04:23,471 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:04:23 BoogieIcfgContainer [2020-12-22 07:04:23,471 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 07:04:23,473 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 07:04:23,474 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 07:04:23,477 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 07:04:23,477 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 07:04:22" (1/3) ... [2020-12-22 07:04:23,478 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@612100f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 07:04:23, skipping insertion in model container [2020-12-22 07:04:23,479 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:04:23" (2/3) ... [2020-12-22 07:04:23,479 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@612100f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 07:04:23, skipping insertion in model container [2020-12-22 07:04:23,479 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:04:23" (3/3) ... [2020-12-22 07:04:23,481 INFO L111 eAbstractionObserver]: Analyzing ICFG sum_25x0-1.c [2020-12-22 07:04:23,488 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 07:04:23,492 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 07:04:23,511 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 07:04:23,541 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 07:04:23,542 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 07:04:23,542 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 07:04:23,542 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 07:04:23,542 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 07:04:23,542 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 07:04:23,543 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 07:04:23,543 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 07:04:23,561 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states. [2020-12-22 07:04:23,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-22 07:04:23,568 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:04:23,569 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:04:23,569 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:04:23,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:04:23,601 INFO L82 PathProgramCache]: Analyzing trace with hash -358017204, now seen corresponding path program 1 times [2020-12-22 07:04:23,634 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:04:23,635 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143134300] [2020-12-22 07:04:23,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:04:23,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:23,944 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:23,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:24,046 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:04:24,047 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143134300] [2020-12-22 07:04:24,048 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:04:24,048 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:04:24,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700744212] [2020-12-22 07:04:24,054 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:04:24,054 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:04:24,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:04:24,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:04:24,073 INFO L87 Difference]: Start difference. First operand 16 states. Second operand 5 states. [2020-12-22 07:04:24,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:04:24,175 INFO L93 Difference]: Finished difference Result 25 states and 28 transitions. [2020-12-22 07:04:24,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 07:04:24,177 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-12-22 07:04:24,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:04:24,187 INFO L225 Difference]: With dead ends: 25 [2020-12-22 07:04:24,187 INFO L226 Difference]: Without dead ends: 15 [2020-12-22 07:04:24,191 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-22 07:04:24,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-12-22 07:04:24,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-12-22 07:04:24,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-12-22 07:04:24,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2020-12-22 07:04:24,243 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 10 [2020-12-22 07:04:24,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:04:24,243 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2020-12-22 07:04:24,244 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:04:24,244 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2020-12-22 07:04:24,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-22 07:04:24,246 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:04:24,246 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:04:24,247 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 07:04:24,248 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:04:24,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:04:24,249 INFO L82 PathProgramCache]: Analyzing trace with hash 679465686, now seen corresponding path program 1 times [2020-12-22 07:04:24,250 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:04:24,251 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975825829] [2020-12-22 07:04:24,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:04:24,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:24,350 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:24,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:24,424 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:24,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:24,456 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 07:04:24,456 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975825829] [2020-12-22 07:04:24,457 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [408234445] [2020-12-22 07:04:24,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 07:04:24,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:24,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-22 07:04:24,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 07:04:24,656 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 07:04:24,656 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 07:04:24,656 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-12-22 07:04:24,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715003523] [2020-12-22 07:04:24,661 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 07:04:24,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:04:24,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 07:04:24,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-12-22 07:04:24,663 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 7 states. [2020-12-22 07:04:24,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:04:24,711 INFO L93 Difference]: Finished difference Result 22 states and 23 transitions. [2020-12-22 07:04:24,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 07:04:24,712 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 16 [2020-12-22 07:04:24,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:04:24,713 INFO L225 Difference]: With dead ends: 22 [2020-12-22 07:04:24,713 INFO L226 Difference]: Without dead ends: 18 [2020-12-22 07:04:24,714 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-12-22 07:04:24,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-12-22 07:04:24,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-12-22 07:04:24,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-12-22 07:04:24,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-12-22 07:04:24,721 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 16 [2020-12-22 07:04:24,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:04:24,721 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-12-22 07:04:24,721 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 07:04:24,722 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-12-22 07:04:24,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-12-22 07:04:24,723 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:04:24,723 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:04:24,937 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-12-22 07:04:24,938 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:04:24,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:04:24,940 INFO L82 PathProgramCache]: Analyzing trace with hash -41010676, now seen corresponding path program 2 times [2020-12-22 07:04:24,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:04:24,941 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182203558] [2020-12-22 07:04:24,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:04:24,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:24,983 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:24,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:25,016 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:25,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:25,041 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:25,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:25,062 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-22 07:04:25,063 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182203558] [2020-12-22 07:04:25,063 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [151180088] [2020-12-22 07:04:25,063 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 07:04:25,118 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 07:04:25,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 07:04:25,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-22 07:04:25,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 07:04:25,193 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-22 07:04:25,194 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 07:04:25,194 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-12-22 07:04:25,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601306899] [2020-12-22 07:04:25,195 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 07:04:25,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:04:25,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 07:04:25,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-12-22 07:04:25,197 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 8 states. [2020-12-22 07:04:25,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:04:25,277 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2020-12-22 07:04:25,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 07:04:25,277 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 22 [2020-12-22 07:04:25,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:04:25,279 INFO L225 Difference]: With dead ends: 25 [2020-12-22 07:04:25,279 INFO L226 Difference]: Without dead ends: 21 [2020-12-22 07:04:25,282 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-12-22 07:04:25,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-12-22 07:04:25,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-12-22 07:04:25,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-12-22 07:04:25,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-12-22 07:04:25,297 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 22 [2020-12-22 07:04:25,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:04:25,298 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-12-22 07:04:25,299 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 07:04:25,299 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-12-22 07:04:25,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-12-22 07:04:25,302 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:04:25,302 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:04:25,516 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 07:04:25,517 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:04:25,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:04:25,519 INFO L82 PathProgramCache]: Analyzing trace with hash 1769866774, now seen corresponding path program 3 times [2020-12-22 07:04:25,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:04:25,520 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679828156] [2020-12-22 07:04:25,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:04:25,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:25,560 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:25,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:25,631 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:25,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:25,678 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:25,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:25,716 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:25,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:25,750 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-12-22 07:04:25,751 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679828156] [2020-12-22 07:04:25,751 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1320102267] [2020-12-22 07:04:25,752 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 07:04:25,820 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-22 07:04:25,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 07:04:25,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-22 07:04:25,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 07:04:25,920 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-12-22 07:04:25,921 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 07:04:25,921 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-12-22 07:04:25,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329630446] [2020-12-22 07:04:25,922 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 07:04:25,922 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:04:25,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 07:04:25,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-12-22 07:04:25,923 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 9 states. [2020-12-22 07:04:25,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:04:25,995 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2020-12-22 07:04:25,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 07:04:25,996 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 28 [2020-12-22 07:04:25,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:04:25,997 INFO L225 Difference]: With dead ends: 28 [2020-12-22 07:04:25,998 INFO L226 Difference]: Without dead ends: 24 [2020-12-22 07:04:25,999 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-12-22 07:04:25,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-12-22 07:04:26,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-12-22 07:04:26,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-12-22 07:04:26,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-12-22 07:04:26,006 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 28 [2020-12-22 07:04:26,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:04:26,006 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-12-22 07:04:26,006 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 07:04:26,007 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-12-22 07:04:26,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-12-22 07:04:26,008 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:04:26,008 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:04:26,224 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 07:04:26,225 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:04:26,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:04:26,227 INFO L82 PathProgramCache]: Analyzing trace with hash 371264716, now seen corresponding path program 4 times [2020-12-22 07:04:26,227 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:04:26,228 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770832298] [2020-12-22 07:04:26,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:04:26,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:26,289 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:26,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:26,343 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:26,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:26,393 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:26,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:26,424 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:26,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:26,441 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:26,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:26,467 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-12-22 07:04:26,467 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770832298] [2020-12-22 07:04:26,468 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1712142770] [2020-12-22 07:04:26,468 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 07:04:26,528 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 07:04:26,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 07:04:26,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-22 07:04:26,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 07:04:26,674 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-12-22 07:04:26,675 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 07:04:26,675 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-12-22 07:04:26,676 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127366452] [2020-12-22 07:04:26,676 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 07:04:26,676 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:04:26,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 07:04:26,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-12-22 07:04:26,679 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 10 states. [2020-12-22 07:04:26,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:04:26,777 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2020-12-22 07:04:26,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 07:04:26,778 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 34 [2020-12-22 07:04:26,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:04:26,781 INFO L225 Difference]: With dead ends: 31 [2020-12-22 07:04:26,782 INFO L226 Difference]: Without dead ends: 27 [2020-12-22 07:04:26,788 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2020-12-22 07:04:26,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-12-22 07:04:26,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-12-22 07:04:26,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-12-22 07:04:26,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-12-22 07:04:26,804 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 34 [2020-12-22 07:04:26,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:04:26,805 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-12-22 07:04:26,805 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 07:04:26,805 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-12-22 07:04:26,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-12-22 07:04:26,808 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:04:26,808 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:04:27,023 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 07:04:27,024 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:04:27,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:04:27,024 INFO L82 PathProgramCache]: Analyzing trace with hash -886339242, now seen corresponding path program 5 times [2020-12-22 07:04:27,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:04:27,025 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640892138] [2020-12-22 07:04:27,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:04:27,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:27,055 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:27,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:27,084 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:27,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:27,108 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:27,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:27,132 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:27,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:27,178 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:27,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:27,196 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:27,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:27,219 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-12-22 07:04:27,219 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640892138] [2020-12-22 07:04:27,220 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [622760564] [2020-12-22 07:04:27,220 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 07:04:27,285 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-12-22 07:04:27,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 07:04:27,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-22 07:04:27,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 07:04:27,371 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-12-22 07:04:27,371 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 07:04:27,371 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-12-22 07:04:27,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442005595] [2020-12-22 07:04:27,372 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-22 07:04:27,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:04:27,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-22 07:04:27,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-12-22 07:04:27,373 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 11 states. [2020-12-22 07:04:27,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:04:27,479 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2020-12-22 07:04:27,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 07:04:27,479 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 40 [2020-12-22 07:04:27,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:04:27,481 INFO L225 Difference]: With dead ends: 34 [2020-12-22 07:04:27,481 INFO L226 Difference]: Without dead ends: 30 [2020-12-22 07:04:27,482 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=95, Invalid=177, Unknown=0, NotChecked=0, Total=272 [2020-12-22 07:04:27,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-12-22 07:04:27,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-12-22 07:04:27,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-12-22 07:04:27,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2020-12-22 07:04:27,487 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 40 [2020-12-22 07:04:27,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:04:27,488 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2020-12-22 07:04:27,488 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-22 07:04:27,488 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2020-12-22 07:04:27,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-12-22 07:04:27,490 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:04:27,490 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:04:27,699 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-12-22 07:04:27,700 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:04:27,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:04:27,701 INFO L82 PathProgramCache]: Analyzing trace with hash -918712436, now seen corresponding path program 6 times [2020-12-22 07:04:27,702 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:04:27,702 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149767095] [2020-12-22 07:04:27,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:04:27,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:27,746 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:27,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:27,777 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:27,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:27,802 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:27,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:27,824 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:27,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:27,844 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:27,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:27,871 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:27,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:27,890 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:27,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:27,921 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-12-22 07:04:27,921 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149767095] [2020-12-22 07:04:27,922 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1436544581] [2020-12-22 07:04:27,922 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 07:04:27,991 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-12-22 07:04:27,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 07:04:27,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-22 07:04:27,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 07:04:28,111 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-12-22 07:04:28,111 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 07:04:28,112 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-12-22 07:04:28,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434918520] [2020-12-22 07:04:28,112 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-22 07:04:28,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:04:28,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-22 07:04:28,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-12-22 07:04:28,114 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 12 states. [2020-12-22 07:04:28,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:04:28,222 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2020-12-22 07:04:28,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-22 07:04:28,223 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 46 [2020-12-22 07:04:28,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:04:28,225 INFO L225 Difference]: With dead ends: 37 [2020-12-22 07:04:28,225 INFO L226 Difference]: Without dead ends: 33 [2020-12-22 07:04:28,227 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=222, Unknown=0, NotChecked=0, Total=342 [2020-12-22 07:04:28,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-12-22 07:04:28,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-12-22 07:04:28,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-12-22 07:04:28,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2020-12-22 07:04:28,233 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 46 [2020-12-22 07:04:28,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:04:28,234 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2020-12-22 07:04:28,234 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-22 07:04:28,234 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2020-12-22 07:04:28,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-12-22 07:04:28,236 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:04:28,236 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:04:28,451 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 07:04:28,451 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:04:28,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:04:28,452 INFO L82 PathProgramCache]: Analyzing trace with hash -626238314, now seen corresponding path program 7 times [2020-12-22 07:04:28,452 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:04:28,453 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500856488] [2020-12-22 07:04:28,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:04:28,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:28,488 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:28,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:28,525 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:28,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:28,563 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:28,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:28,597 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:28,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:28,620 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:28,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:28,649 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:28,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:28,671 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:28,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:28,692 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:28,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:28,725 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-12-22 07:04:28,725 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500856488] [2020-12-22 07:04:28,725 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [968789371] [2020-12-22 07:04:28,725 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 07:04:28,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:28,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-22 07:04:28,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 07:04:28,899 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-12-22 07:04:28,900 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 07:04:28,900 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-12-22 07:04:28,900 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212488664] [2020-12-22 07:04:28,901 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-22 07:04:28,901 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:04:28,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-22 07:04:28,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-12-22 07:04:28,902 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 13 states. [2020-12-22 07:04:29,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:04:29,059 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2020-12-22 07:04:29,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-22 07:04:29,059 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 52 [2020-12-22 07:04:29,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:04:29,063 INFO L225 Difference]: With dead ends: 40 [2020-12-22 07:04:29,063 INFO L226 Difference]: Without dead ends: 36 [2020-12-22 07:04:29,064 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=148, Invalid=272, Unknown=0, NotChecked=0, Total=420 [2020-12-22 07:04:29,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-12-22 07:04:29,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-12-22 07:04:29,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-12-22 07:04:29,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2020-12-22 07:04:29,076 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 52 [2020-12-22 07:04:29,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:04:29,076 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2020-12-22 07:04:29,076 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-22 07:04:29,077 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2020-12-22 07:04:29,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-12-22 07:04:29,081 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:04:29,081 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:04:29,295 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 07:04:29,296 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:04:29,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:04:29,297 INFO L82 PathProgramCache]: Analyzing trace with hash -960511412, now seen corresponding path program 8 times [2020-12-22 07:04:29,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:04:29,298 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427474286] [2020-12-22 07:04:29,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:04:29,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:29,330 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:29,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:29,360 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:29,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:29,387 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:29,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:29,412 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:29,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:29,436 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:29,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:29,458 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:29,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:29,477 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:29,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:29,498 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:29,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:29,517 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:29,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:29,551 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-12-22 07:04:29,551 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427474286] [2020-12-22 07:04:29,551 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1448938670] [2020-12-22 07:04:29,551 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 07:04:29,613 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 07:04:29,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 07:04:29,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-22 07:04:29,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 07:04:29,710 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-12-22 07:04:29,710 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 07:04:29,711 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-12-22 07:04:29,711 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380753493] [2020-12-22 07:04:29,711 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-22 07:04:29,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:04:29,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-22 07:04:29,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2020-12-22 07:04:29,713 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 14 states. [2020-12-22 07:04:29,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:04:29,870 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2020-12-22 07:04:29,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-22 07:04:29,870 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 58 [2020-12-22 07:04:29,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:04:29,872 INFO L225 Difference]: With dead ends: 43 [2020-12-22 07:04:29,872 INFO L226 Difference]: Without dead ends: 39 [2020-12-22 07:04:29,873 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=179, Invalid=327, Unknown=0, NotChecked=0, Total=506 [2020-12-22 07:04:29,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-12-22 07:04:29,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-12-22 07:04:29,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-12-22 07:04:29,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2020-12-22 07:04:29,880 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 58 [2020-12-22 07:04:29,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:04:29,880 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2020-12-22 07:04:29,880 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-22 07:04:29,880 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2020-12-22 07:04:29,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 07:04:29,882 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:04:29,882 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:04:30,096 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-12-22 07:04:30,097 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:04:30,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:04:30,098 INFO L82 PathProgramCache]: Analyzing trace with hash -366706730, now seen corresponding path program 9 times [2020-12-22 07:04:30,099 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:04:30,099 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144229117] [2020-12-22 07:04:30,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:04:30,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:30,135 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:30,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:30,174 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:30,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:30,205 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:30,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:30,237 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:30,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:30,267 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:30,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:30,293 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:30,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:30,318 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:30,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:30,341 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:30,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:30,362 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:30,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:30,382 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:30,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:30,424 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-12-22 07:04:30,425 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144229117] [2020-12-22 07:04:30,425 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [699647113] [2020-12-22 07:04:30,425 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 07:04:30,504 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-12-22 07:04:30,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 07:04:30,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 22 conjunts are in the unsatisfiable core [2020-12-22 07:04:30,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 07:04:30,666 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-12-22 07:04:30,667 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 07:04:30,667 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-12-22 07:04:30,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449794081] [2020-12-22 07:04:30,669 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-22 07:04:30,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:04:30,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-22 07:04:30,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2020-12-22 07:04:30,674 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 15 states. [2020-12-22 07:04:30,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:04:30,841 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2020-12-22 07:04:30,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-22 07:04:30,841 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 64 [2020-12-22 07:04:30,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:04:30,847 INFO L225 Difference]: With dead ends: 46 [2020-12-22 07:04:30,847 INFO L226 Difference]: Without dead ends: 42 [2020-12-22 07:04:30,849 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=213, Invalid=387, Unknown=0, NotChecked=0, Total=600 [2020-12-22 07:04:30,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-12-22 07:04:30,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-12-22 07:04:30,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-12-22 07:04:30,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2020-12-22 07:04:30,865 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 64 [2020-12-22 07:04:30,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:04:30,865 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2020-12-22 07:04:30,865 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-22 07:04:30,866 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2020-12-22 07:04:30,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-12-22 07:04:30,868 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:04:30,868 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:04:31,082 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 07:04:31,083 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:04:31,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:04:31,084 INFO L82 PathProgramCache]: Analyzing trace with hash -1719425780, now seen corresponding path program 10 times [2020-12-22 07:04:31,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:04:31,085 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705042441] [2020-12-22 07:04:31,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:04:31,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:31,119 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:31,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:31,152 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:31,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:31,182 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:31,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:31,215 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:31,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:31,242 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:31,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:31,268 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:31,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:31,291 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:31,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:31,317 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:31,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:31,340 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:31,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:31,375 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:31,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:31,397 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:31,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:31,446 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2020-12-22 07:04:31,446 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705042441] [2020-12-22 07:04:31,446 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1870940304] [2020-12-22 07:04:31,447 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 07:04:31,523 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 07:04:31,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 07:04:31,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 24 conjunts are in the unsatisfiable core [2020-12-22 07:04:31,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 07:04:31,669 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2020-12-22 07:04:31,669 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 07:04:31,669 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-12-22 07:04:31,670 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849674310] [2020-12-22 07:04:31,670 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-22 07:04:31,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:04:31,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-22 07:04:31,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2020-12-22 07:04:31,671 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 16 states. [2020-12-22 07:04:31,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:04:31,857 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2020-12-22 07:04:31,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-22 07:04:31,858 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 70 [2020-12-22 07:04:31,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:04:31,860 INFO L225 Difference]: With dead ends: 49 [2020-12-22 07:04:31,860 INFO L226 Difference]: Without dead ends: 45 [2020-12-22 07:04:31,862 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=250, Invalid=452, Unknown=0, NotChecked=0, Total=702 [2020-12-22 07:04:31,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-12-22 07:04:31,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-12-22 07:04:31,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-12-22 07:04:31,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2020-12-22 07:04:31,874 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 70 [2020-12-22 07:04:31,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:04:31,876 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2020-12-22 07:04:31,876 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-22 07:04:31,876 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2020-12-22 07:04:31,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-12-22 07:04:31,880 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:04:31,880 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:04:32,093 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 07:04:32,094 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:04:32,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:04:32,095 INFO L82 PathProgramCache]: Analyzing trace with hash 1354232598, now seen corresponding path program 11 times [2020-12-22 07:04:32,096 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:04:32,096 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498358018] [2020-12-22 07:04:32,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:04:32,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:32,141 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:32,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:32,205 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:32,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:32,239 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:32,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:32,286 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:32,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:32,323 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:32,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:32,373 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:32,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:32,401 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:32,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:32,434 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:32,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:32,462 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:32,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:32,486 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:32,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:32,509 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:32,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:32,534 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:32,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:32,585 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2020-12-22 07:04:32,585 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498358018] [2020-12-22 07:04:32,585 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [465625283] [2020-12-22 07:04:32,585 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 07:04:32,712 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-12-22 07:04:32,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 07:04:32,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 26 conjunts are in the unsatisfiable core [2020-12-22 07:04:32,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 07:04:32,887 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2020-12-22 07:04:32,888 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 07:04:32,888 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-12-22 07:04:32,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697443837] [2020-12-22 07:04:32,889 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 07:04:32,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:04:32,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 07:04:32,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=174, Unknown=0, NotChecked=0, Total=272 [2020-12-22 07:04:32,891 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 17 states. [2020-12-22 07:04:33,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:04:33,081 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2020-12-22 07:04:33,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-22 07:04:33,082 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 76 [2020-12-22 07:04:33,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:04:33,083 INFO L225 Difference]: With dead ends: 52 [2020-12-22 07:04:33,083 INFO L226 Difference]: Without dead ends: 48 [2020-12-22 07:04:33,087 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=290, Invalid=522, Unknown=0, NotChecked=0, Total=812 [2020-12-22 07:04:33,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-12-22 07:04:33,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2020-12-22 07:04:33,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-12-22 07:04:33,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2020-12-22 07:04:33,098 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 76 [2020-12-22 07:04:33,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:04:33,098 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2020-12-22 07:04:33,098 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 07:04:33,098 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2020-12-22 07:04:33,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-12-22 07:04:33,099 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:04:33,099 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:04:33,313 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-12-22 07:04:33,314 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:04:33,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:04:33,315 INFO L82 PathProgramCache]: Analyzing trace with hash 1734686668, now seen corresponding path program 12 times [2020-12-22 07:04:33,315 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:04:33,315 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706562740] [2020-12-22 07:04:33,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:04:33,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:33,351 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:33,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:33,387 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:33,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:33,419 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:33,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:33,448 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:33,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:33,475 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:33,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:33,501 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:33,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:33,529 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:33,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:33,553 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:33,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:33,577 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:33,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:33,600 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:33,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:33,646 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:33,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:33,670 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:33,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:33,692 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:33,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:33,770 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2020-12-22 07:04:33,770 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706562740] [2020-12-22 07:04:33,770 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1662525257] [2020-12-22 07:04:33,771 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 07:04:33,859 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-12-22 07:04:33,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 07:04:33,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 28 conjunts are in the unsatisfiable core [2020-12-22 07:04:33,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 07:04:33,981 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2020-12-22 07:04:33,982 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 07:04:33,982 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-12-22 07:04:33,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473995771] [2020-12-22 07:04:33,983 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-22 07:04:33,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:04:33,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-22 07:04:33,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=194, Unknown=0, NotChecked=0, Total=306 [2020-12-22 07:04:33,984 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 18 states. [2020-12-22 07:04:34,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:04:34,170 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2020-12-22 07:04:34,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-22 07:04:34,170 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 82 [2020-12-22 07:04:34,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:04:34,171 INFO L225 Difference]: With dead ends: 55 [2020-12-22 07:04:34,171 INFO L226 Difference]: Without dead ends: 51 [2020-12-22 07:04:34,172 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=333, Invalid=597, Unknown=0, NotChecked=0, Total=930 [2020-12-22 07:04:34,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-12-22 07:04:34,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-12-22 07:04:34,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-12-22 07:04:34,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2020-12-22 07:04:34,177 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 82 [2020-12-22 07:04:34,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:04:34,178 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2020-12-22 07:04:34,178 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-22 07:04:34,178 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2020-12-22 07:04:34,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-12-22 07:04:34,179 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:04:34,179 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:04:34,395 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-12-22 07:04:34,396 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:04:34,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:04:34,397 INFO L82 PathProgramCache]: Analyzing trace with hash -1433749930, now seen corresponding path program 13 times [2020-12-22 07:04:34,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:04:34,397 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535340388] [2020-12-22 07:04:34,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:04:34,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:34,450 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:34,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:34,496 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:34,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:34,551 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:34,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:34,583 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:34,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:34,612 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:34,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:34,639 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:34,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:34,665 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:34,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:34,691 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:34,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:34,716 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:34,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:34,741 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:34,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:34,763 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:34,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:34,786 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:34,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:34,808 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:34,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:34,829 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:34,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:34,891 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2020-12-22 07:04:34,891 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535340388] [2020-12-22 07:04:34,891 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [719816780] [2020-12-22 07:04:34,892 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 07:04:34,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:34,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 30 conjunts are in the unsatisfiable core [2020-12-22 07:04:34,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 07:04:35,162 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2020-12-22 07:04:35,162 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 07:04:35,162 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-12-22 07:04:35,163 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921196154] [2020-12-22 07:04:35,164 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-22 07:04:35,164 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:04:35,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-22 07:04:35,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=215, Unknown=0, NotChecked=0, Total=342 [2020-12-22 07:04:35,165 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 19 states. [2020-12-22 07:04:35,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:04:35,372 INFO L93 Difference]: Finished difference Result 58 states and 59 transitions. [2020-12-22 07:04:35,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-22 07:04:35,373 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 88 [2020-12-22 07:04:35,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:04:35,374 INFO L225 Difference]: With dead ends: 58 [2020-12-22 07:04:35,374 INFO L226 Difference]: Without dead ends: 54 [2020-12-22 07:04:35,376 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=379, Invalid=677, Unknown=0, NotChecked=0, Total=1056 [2020-12-22 07:04:35,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-12-22 07:04:35,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2020-12-22 07:04:35,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-12-22 07:04:35,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2020-12-22 07:04:35,384 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 88 [2020-12-22 07:04:35,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:04:35,385 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2020-12-22 07:04:35,385 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-22 07:04:35,385 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2020-12-22 07:04:35,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-12-22 07:04:35,386 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:04:35,387 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:04:35,590 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-22 07:04:35,591 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:04:35,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:04:35,591 INFO L82 PathProgramCache]: Analyzing trace with hash -1321174388, now seen corresponding path program 14 times [2020-12-22 07:04:35,592 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:04:35,592 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209128395] [2020-12-22 07:04:35,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:04:35,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:35,635 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:35,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:35,683 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:35,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:35,722 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:35,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:35,758 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:35,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:35,797 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:35,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:35,831 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:35,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:35,862 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:35,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:35,893 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:35,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:35,921 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:35,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:35,948 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:35,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:35,974 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:35,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:36,001 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:36,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:36,026 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:36,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:36,050 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:36,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:36,072 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:36,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:36,177 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2020-12-22 07:04:36,177 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209128395] [2020-12-22 07:04:36,178 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1826543897] [2020-12-22 07:04:36,178 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 07:04:36,262 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 07:04:36,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 07:04:36,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 32 conjunts are in the unsatisfiable core [2020-12-22 07:04:36,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 07:04:36,413 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2020-12-22 07:04:36,413 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 07:04:36,413 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-12-22 07:04:36,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4454066] [2020-12-22 07:04:36,414 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-22 07:04:36,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:04:36,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-22 07:04:36,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=237, Unknown=0, NotChecked=0, Total=380 [2020-12-22 07:04:36,415 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand 20 states. [2020-12-22 07:04:36,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:04:36,647 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2020-12-22 07:04:36,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-22 07:04:36,648 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 94 [2020-12-22 07:04:36,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:04:36,649 INFO L225 Difference]: With dead ends: 61 [2020-12-22 07:04:36,649 INFO L226 Difference]: Without dead ends: 57 [2020-12-22 07:04:36,650 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=428, Invalid=762, Unknown=0, NotChecked=0, Total=1190 [2020-12-22 07:04:36,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-12-22 07:04:36,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-12-22 07:04:36,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-12-22 07:04:36,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2020-12-22 07:04:36,655 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 94 [2020-12-22 07:04:36,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:04:36,655 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2020-12-22 07:04:36,655 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-22 07:04:36,655 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2020-12-22 07:04:36,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-12-22 07:04:36,656 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:04:36,656 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:04:36,870 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 07:04:36,871 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:04:36,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:04:36,872 INFO L82 PathProgramCache]: Analyzing trace with hash 415287702, now seen corresponding path program 15 times [2020-12-22 07:04:36,872 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:04:36,872 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956807922] [2020-12-22 07:04:36,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:04:36,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:36,913 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:36,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:36,980 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:36,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:37,022 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:37,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:37,060 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:37,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:37,097 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:37,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:37,132 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:37,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:37,167 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:37,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:37,200 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:37,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:37,231 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:37,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:37,269 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:37,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:37,296 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:37,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:37,322 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:37,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:37,347 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:37,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:37,371 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:37,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:37,394 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:37,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:37,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:37,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:37,492 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2020-12-22 07:04:37,493 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956807922] [2020-12-22 07:04:37,493 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [36230159] [2020-12-22 07:04:37,493 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 07:04:37,613 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2020-12-22 07:04:37,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 07:04:37,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 34 conjunts are in the unsatisfiable core [2020-12-22 07:04:37,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 07:04:37,777 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2020-12-22 07:04:37,778 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 07:04:37,778 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-12-22 07:04:37,778 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665548950] [2020-12-22 07:04:37,779 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-22 07:04:37,779 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:04:37,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-22 07:04:37,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=260, Unknown=0, NotChecked=0, Total=420 [2020-12-22 07:04:37,780 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 21 states. [2020-12-22 07:04:38,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:04:38,014 INFO L93 Difference]: Finished difference Result 64 states and 65 transitions. [2020-12-22 07:04:38,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-22 07:04:38,014 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 100 [2020-12-22 07:04:38,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:04:38,015 INFO L225 Difference]: With dead ends: 64 [2020-12-22 07:04:38,015 INFO L226 Difference]: Without dead ends: 60 [2020-12-22 07:04:38,017 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=480, Invalid=852, Unknown=0, NotChecked=0, Total=1332 [2020-12-22 07:04:38,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-12-22 07:04:38,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2020-12-22 07:04:38,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-12-22 07:04:38,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2020-12-22 07:04:38,021 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 100 [2020-12-22 07:04:38,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:04:38,022 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2020-12-22 07:04:38,022 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-22 07:04:38,022 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2020-12-22 07:04:38,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-12-22 07:04:38,023 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:04:38,023 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:04:38,236 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-12-22 07:04:38,237 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:04:38,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:04:38,238 INFO L82 PathProgramCache]: Analyzing trace with hash 317812044, now seen corresponding path program 16 times [2020-12-22 07:04:38,238 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:04:38,238 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994833632] [2020-12-22 07:04:38,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:04:38,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:38,281 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:38,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:38,325 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:38,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:38,364 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:38,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:38,400 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:38,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:38,437 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:38,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:38,471 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:38,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:38,504 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:38,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:38,537 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:38,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:38,568 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:38,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:38,599 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:38,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:38,629 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:38,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:38,661 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:38,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:38,687 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:38,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:38,757 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:38,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:38,787 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:38,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:38,812 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:38,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:38,836 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:38,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:38,932 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2020-12-22 07:04:38,933 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994833632] [2020-12-22 07:04:38,933 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1007118137] [2020-12-22 07:04:38,933 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 07:04:39,016 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 07:04:39,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 07:04:39,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 36 conjunts are in the unsatisfiable core [2020-12-22 07:04:39,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 07:04:39,189 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2020-12-22 07:04:39,190 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 07:04:39,190 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-12-22 07:04:39,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224448372] [2020-12-22 07:04:39,190 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-22 07:04:39,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:04:39,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-22 07:04:39,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=284, Unknown=0, NotChecked=0, Total=462 [2020-12-22 07:04:39,192 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand 22 states. [2020-12-22 07:04:39,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:04:39,443 INFO L93 Difference]: Finished difference Result 67 states and 68 transitions. [2020-12-22 07:04:39,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-22 07:04:39,444 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 106 [2020-12-22 07:04:39,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:04:39,445 INFO L225 Difference]: With dead ends: 67 [2020-12-22 07:04:39,445 INFO L226 Difference]: Without dead ends: 63 [2020-12-22 07:04:39,446 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=535, Invalid=947, Unknown=0, NotChecked=0, Total=1482 [2020-12-22 07:04:39,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-12-22 07:04:39,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2020-12-22 07:04:39,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-12-22 07:04:39,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2020-12-22 07:04:39,450 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 106 [2020-12-22 07:04:39,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:04:39,450 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2020-12-22 07:04:39,451 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-22 07:04:39,451 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2020-12-22 07:04:39,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-12-22 07:04:39,452 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:04:39,452 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:04:39,666 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-22 07:04:39,666 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:04:39,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:04:39,667 INFO L82 PathProgramCache]: Analyzing trace with hash -2122437418, now seen corresponding path program 17 times [2020-12-22 07:04:39,667 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:04:39,667 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845167080] [2020-12-22 07:04:39,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:04:39,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:39,711 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:39,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:39,757 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:39,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:39,803 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:39,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:39,851 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:39,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:39,899 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:39,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:39,939 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:39,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:39,981 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:39,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:40,022 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:40,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:40,058 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:40,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:40,092 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:40,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:40,128 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:40,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:40,158 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:40,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:40,185 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:40,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:40,214 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:40,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:40,242 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:40,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:40,269 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:40,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:40,295 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:40,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:40,321 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:40,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:40,447 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2020-12-22 07:04:40,447 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845167080] [2020-12-22 07:04:40,447 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1813209850] [2020-12-22 07:04:40,447 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 07:04:40,577 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2020-12-22 07:04:40,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 07:04:40,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 38 conjunts are in the unsatisfiable core [2020-12-22 07:04:40,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 07:04:40,741 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2020-12-22 07:04:40,741 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 07:04:40,741 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-12-22 07:04:40,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674823111] [2020-12-22 07:04:40,742 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-22 07:04:40,742 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:04:40,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-22 07:04:40,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=309, Unknown=0, NotChecked=0, Total=506 [2020-12-22 07:04:40,743 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand 23 states. [2020-12-22 07:04:41,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:04:41,036 INFO L93 Difference]: Finished difference Result 70 states and 71 transitions. [2020-12-22 07:04:41,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-22 07:04:41,036 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 112 [2020-12-22 07:04:41,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:04:41,038 INFO L225 Difference]: With dead ends: 70 [2020-12-22 07:04:41,038 INFO L226 Difference]: Without dead ends: 66 [2020-12-22 07:04:41,040 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=593, Invalid=1047, Unknown=0, NotChecked=0, Total=1640 [2020-12-22 07:04:41,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-12-22 07:04:41,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2020-12-22 07:04:41,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-12-22 07:04:41,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 67 transitions. [2020-12-22 07:04:41,044 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 67 transitions. Word has length 112 [2020-12-22 07:04:41,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:04:41,045 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 67 transitions. [2020-12-22 07:04:41,045 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-22 07:04:41,045 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 67 transitions. [2020-12-22 07:04:41,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2020-12-22 07:04:41,046 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:04:41,046 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:04:41,260 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-22 07:04:41,261 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:04:41,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:04:41,262 INFO L82 PathProgramCache]: Analyzing trace with hash 55840780, now seen corresponding path program 18 times [2020-12-22 07:04:41,262 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:04:41,263 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339829601] [2020-12-22 07:04:41,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:04:41,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:41,323 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:41,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:41,379 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:41,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:41,428 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:41,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:41,476 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:41,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:41,522 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:41,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:41,567 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:41,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:41,605 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:41,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:41,639 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:41,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:41,671 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:41,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:41,706 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:41,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:41,736 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:41,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:41,766 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:41,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:41,796 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:41,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:41,824 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:41,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:41,857 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:41,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:41,890 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:41,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:41,927 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:41,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:41,965 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:41,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:41,997 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:42,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:42,196 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2020-12-22 07:04:42,197 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339829601] [2020-12-22 07:04:42,197 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1624777943] [2020-12-22 07:04:42,197 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 07:04:42,327 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2020-12-22 07:04:42,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 07:04:42,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 40 conjunts are in the unsatisfiable core [2020-12-22 07:04:42,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 07:04:42,518 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2020-12-22 07:04:42,518 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 07:04:42,519 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-12-22 07:04:42,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121896873] [2020-12-22 07:04:42,519 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-12-22 07:04:42,520 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:04:42,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-12-22 07:04:42,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=335, Unknown=0, NotChecked=0, Total=552 [2020-12-22 07:04:42,520 INFO L87 Difference]: Start difference. First operand 66 states and 67 transitions. Second operand 24 states. [2020-12-22 07:04:42,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:04:42,805 INFO L93 Difference]: Finished difference Result 73 states and 74 transitions. [2020-12-22 07:04:42,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-12-22 07:04:42,806 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 118 [2020-12-22 07:04:42,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:04:42,807 INFO L225 Difference]: With dead ends: 73 [2020-12-22 07:04:42,807 INFO L226 Difference]: Without dead ends: 69 [2020-12-22 07:04:42,808 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=654, Invalid=1152, Unknown=0, NotChecked=0, Total=1806 [2020-12-22 07:04:42,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-12-22 07:04:42,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2020-12-22 07:04:42,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-12-22 07:04:42,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2020-12-22 07:04:42,812 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 118 [2020-12-22 07:04:42,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:04:42,812 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2020-12-22 07:04:42,813 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-12-22 07:04:42,813 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2020-12-22 07:04:42,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-12-22 07:04:42,814 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:04:42,814 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:04:43,028 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 07:04:43,029 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:04:43,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:04:43,030 INFO L82 PathProgramCache]: Analyzing trace with hash -806952938, now seen corresponding path program 19 times [2020-12-22 07:04:43,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:04:43,030 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588328164] [2020-12-22 07:04:43,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:04:43,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:43,077 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:43,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:43,128 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:43,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:43,175 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:43,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:43,219 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:43,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:43,261 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:43,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:43,319 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:43,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:43,358 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:43,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:43,395 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:43,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:43,431 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:43,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:43,466 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:43,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:43,505 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:43,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:43,538 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:43,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:43,567 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:43,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:43,597 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:43,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:43,627 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:43,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:43,655 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:43,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:43,684 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:43,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:43,711 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:43,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:43,738 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:43,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:43,764 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:43,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:43,916 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2020-12-22 07:04:43,917 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588328164] [2020-12-22 07:04:43,917 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [750576932] [2020-12-22 07:04:43,917 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 07:04:44,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:44,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 399 conjuncts, 42 conjunts are in the unsatisfiable core [2020-12-22 07:04:44,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 07:04:44,201 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2020-12-22 07:04:44,202 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 07:04:44,202 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-12-22 07:04:44,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933514407] [2020-12-22 07:04:44,203 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-12-22 07:04:44,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:04:44,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-12-22 07:04:44,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=238, Invalid=362, Unknown=0, NotChecked=0, Total=600 [2020-12-22 07:04:44,204 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand 25 states. [2020-12-22 07:04:44,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:04:44,515 INFO L93 Difference]: Finished difference Result 76 states and 77 transitions. [2020-12-22 07:04:44,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-22 07:04:44,516 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 124 [2020-12-22 07:04:44,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:04:44,517 INFO L225 Difference]: With dead ends: 76 [2020-12-22 07:04:44,517 INFO L226 Difference]: Without dead ends: 72 [2020-12-22 07:04:44,519 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 380 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=718, Invalid=1262, Unknown=0, NotChecked=0, Total=1980 [2020-12-22 07:04:44,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-12-22 07:04:44,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2020-12-22 07:04:44,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-12-22 07:04:44,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 73 transitions. [2020-12-22 07:04:44,523 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 73 transitions. Word has length 124 [2020-12-22 07:04:44,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:04:44,523 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 73 transitions. [2020-12-22 07:04:44,523 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-12-22 07:04:44,523 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 73 transitions. [2020-12-22 07:04:44,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-12-22 07:04:44,525 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:04:44,525 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:04:44,738 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 07:04:44,739 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:04:44,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:04:44,740 INFO L82 PathProgramCache]: Analyzing trace with hash -1807457588, now seen corresponding path program 20 times [2020-12-22 07:04:44,740 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:04:44,740 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883977615] [2020-12-22 07:04:44,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:04:44,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:44,790 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:44,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:44,845 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:44,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:44,891 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:44,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:44,937 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:44,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:44,979 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:44,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:45,022 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:45,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:45,078 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:45,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:45,116 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:45,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:45,152 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:45,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:45,187 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:45,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:45,221 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:45,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:45,253 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:45,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:45,287 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:45,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:45,320 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:45,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:45,351 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:45,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:45,380 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:45,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:45,411 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:45,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:45,444 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:45,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:45,471 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:45,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:45,499 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:45,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:45,527 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:45,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:45,732 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 0 proven. 610 refuted. 0 times theorem prover too weak. 610 trivial. 0 not checked. [2020-12-22 07:04:45,732 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883977615] [2020-12-22 07:04:45,733 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [152106806] [2020-12-22 07:04:45,733 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 07:04:45,839 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 07:04:45,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 07:04:45,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 417 conjuncts, 44 conjunts are in the unsatisfiable core [2020-12-22 07:04:45,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 07:04:46,034 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 0 proven. 610 refuted. 0 times theorem prover too weak. 610 trivial. 0 not checked. [2020-12-22 07:04:46,035 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 07:04:46,035 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-12-22 07:04:46,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128458686] [2020-12-22 07:04:46,037 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-12-22 07:04:46,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:04:46,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-12-22 07:04:46,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=260, Invalid=390, Unknown=0, NotChecked=0, Total=650 [2020-12-22 07:04:46,039 INFO L87 Difference]: Start difference. First operand 72 states and 73 transitions. Second operand 26 states. [2020-12-22 07:04:46,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:04:46,362 INFO L93 Difference]: Finished difference Result 79 states and 80 transitions. [2020-12-22 07:04:46,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-22 07:04:46,363 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 130 [2020-12-22 07:04:46,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:04:46,367 INFO L225 Difference]: With dead ends: 79 [2020-12-22 07:04:46,367 INFO L226 Difference]: Without dead ends: 75 [2020-12-22 07:04:46,368 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 420 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=785, Invalid=1377, Unknown=0, NotChecked=0, Total=2162 [2020-12-22 07:04:46,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-12-22 07:04:46,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2020-12-22 07:04:46,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-12-22 07:04:46,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 76 transitions. [2020-12-22 07:04:46,376 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 76 transitions. Word has length 130 [2020-12-22 07:04:46,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:04:46,377 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 76 transitions. [2020-12-22 07:04:46,377 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-12-22 07:04:46,377 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 76 transitions. [2020-12-22 07:04:46,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-12-22 07:04:46,378 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:04:46,379 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:04:46,591 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-12-22 07:04:46,592 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:04:46,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:04:46,593 INFO L82 PathProgramCache]: Analyzing trace with hash 874439510, now seen corresponding path program 21 times [2020-12-22 07:04:46,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:04:46,593 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613570970] [2020-12-22 07:04:46,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:04:46,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:46,647 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:46,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:46,704 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:46,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:46,759 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:46,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:46,812 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:46,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:46,863 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:46,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:46,911 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:46,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:46,973 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:46,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:47,014 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:47,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:47,054 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:47,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:47,089 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:47,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:47,124 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:47,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:47,157 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:47,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:47,195 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:47,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:47,238 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:47,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:47,277 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:47,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:47,316 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:47,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:47,349 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:47,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:47,379 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:47,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:47,408 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:47,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:47,436 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:47,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:47,464 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:47,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:47,493 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:47,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:47,673 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 0 proven. 672 refuted. 0 times theorem prover too weak. 672 trivial. 0 not checked. [2020-12-22 07:04:47,673 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613570970] [2020-12-22 07:04:47,674 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [13009614] [2020-12-22 07:04:47,674 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 07:04:47,802 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2020-12-22 07:04:47,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 07:04:47,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 435 conjuncts, 46 conjunts are in the unsatisfiable core [2020-12-22 07:04:47,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 07:04:48,013 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 0 proven. 672 refuted. 0 times theorem prover too weak. 672 trivial. 0 not checked. [2020-12-22 07:04:48,013 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 07:04:48,013 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-12-22 07:04:48,014 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046061615] [2020-12-22 07:04:48,014 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-12-22 07:04:48,014 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:04:48,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-12-22 07:04:48,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=283, Invalid=419, Unknown=0, NotChecked=0, Total=702 [2020-12-22 07:04:48,015 INFO L87 Difference]: Start difference. First operand 75 states and 76 transitions. Second operand 27 states. [2020-12-22 07:04:48,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:04:48,341 INFO L93 Difference]: Finished difference Result 82 states and 83 transitions. [2020-12-22 07:04:48,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-22 07:04:48,342 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 136 [2020-12-22 07:04:48,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:04:48,343 INFO L225 Difference]: With dead ends: 82 [2020-12-22 07:04:48,343 INFO L226 Difference]: Without dead ends: 78 [2020-12-22 07:04:48,344 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 179 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 462 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=855, Invalid=1497, Unknown=0, NotChecked=0, Total=2352 [2020-12-22 07:04:48,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-12-22 07:04:48,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2020-12-22 07:04:48,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-12-22 07:04:48,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 79 transitions. [2020-12-22 07:04:48,348 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 79 transitions. Word has length 136 [2020-12-22 07:04:48,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:04:48,349 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 79 transitions. [2020-12-22 07:04:48,349 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-12-22 07:04:48,349 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 79 transitions. [2020-12-22 07:04:48,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2020-12-22 07:04:48,350 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:04:48,351 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:04:48,566 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-12-22 07:04:48,567 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:04:48,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:04:48,567 INFO L82 PathProgramCache]: Analyzing trace with hash 849241484, now seen corresponding path program 22 times [2020-12-22 07:04:48,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:04:48,568 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901529186] [2020-12-22 07:04:48,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:04:48,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:48,634 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:48,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:48,713 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:48,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:48,794 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:48,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:48,885 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:48,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:48,957 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:48,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:49,025 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:49,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:49,080 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:49,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:49,153 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:49,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:49,194 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:49,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:49,234 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:49,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:49,271 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:49,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:49,307 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:49,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:49,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:49,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:49,376 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:49,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:49,410 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:49,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:49,444 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:49,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:49,476 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:49,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:49,508 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:49,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:49,539 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:49,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:49,571 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:49,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:49,602 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:49,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:49,632 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:49,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:49,662 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:49,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:49,893 INFO L134 CoverageAnalysis]: Checked inductivity of 1474 backedges. 0 proven. 737 refuted. 0 times theorem prover too weak. 737 trivial. 0 not checked. [2020-12-22 07:04:49,894 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901529186] [2020-12-22 07:04:49,894 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [863259645] [2020-12-22 07:04:49,894 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 07:04:50,017 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 07:04:50,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 07:04:50,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 453 conjuncts, 48 conjunts are in the unsatisfiable core [2020-12-22 07:04:50,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 07:04:50,234 INFO L134 CoverageAnalysis]: Checked inductivity of 1474 backedges. 0 proven. 737 refuted. 0 times theorem prover too weak. 737 trivial. 0 not checked. [2020-12-22 07:04:50,234 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 07:04:50,235 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-12-22 07:04:50,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909399134] [2020-12-22 07:04:50,235 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-12-22 07:04:50,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:04:50,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-12-22 07:04:50,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=307, Invalid=449, Unknown=0, NotChecked=0, Total=756 [2020-12-22 07:04:50,237 INFO L87 Difference]: Start difference. First operand 78 states and 79 transitions. Second operand 28 states. [2020-12-22 07:04:50,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:04:50,625 INFO L93 Difference]: Finished difference Result 85 states and 86 transitions. [2020-12-22 07:04:50,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-12-22 07:04:50,626 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 142 [2020-12-22 07:04:50,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:04:50,627 INFO L225 Difference]: With dead ends: 85 [2020-12-22 07:04:50,627 INFO L226 Difference]: Without dead ends: 81 [2020-12-22 07:04:50,628 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 506 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=928, Invalid=1622, Unknown=0, NotChecked=0, Total=2550 [2020-12-22 07:04:50,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-12-22 07:04:50,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2020-12-22 07:04:50,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-12-22 07:04:50,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 82 transitions. [2020-12-22 07:04:50,638 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 82 transitions. Word has length 142 [2020-12-22 07:04:50,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:04:50,639 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 82 transitions. [2020-12-22 07:04:50,639 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-12-22 07:04:50,639 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 82 transitions. [2020-12-22 07:04:50,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-12-22 07:04:50,640 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:04:50,640 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:04:50,840 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 07:04:50,841 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:04:50,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:04:50,842 INFO L82 PathProgramCache]: Analyzing trace with hash 1665808022, now seen corresponding path program 23 times [2020-12-22 07:04:50,842 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:04:50,843 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607454497] [2020-12-22 07:04:50,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:04:50,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:50,897 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:50,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:50,954 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:50,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:51,008 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:51,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:51,061 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:51,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:51,112 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:51,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:51,159 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:51,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:51,209 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:51,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:51,279 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:51,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:51,319 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:51,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:51,362 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:51,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:51,407 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:51,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:51,452 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:51,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:51,508 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:51,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:51,544 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:51,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:51,579 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:51,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:51,617 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:51,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:51,652 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:51,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:51,686 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:51,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:51,721 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:51,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:51,759 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:51,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:51,795 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:51,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:51,827 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:51,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:51,860 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:51,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:51,891 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:51,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:52,135 INFO L134 CoverageAnalysis]: Checked inductivity of 1610 backedges. 0 proven. 805 refuted. 0 times theorem prover too weak. 805 trivial. 0 not checked. [2020-12-22 07:04:52,136 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607454497] [2020-12-22 07:04:52,136 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2081349940] [2020-12-22 07:04:52,136 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 07:04:52,312 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2020-12-22 07:04:52,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 07:04:52,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 471 conjuncts, 50 conjunts are in the unsatisfiable core [2020-12-22 07:04:52,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 07:04:52,514 INFO L134 CoverageAnalysis]: Checked inductivity of 1610 backedges. 0 proven. 805 refuted. 0 times theorem prover too weak. 805 trivial. 0 not checked. [2020-12-22 07:04:52,515 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 07:04:52,515 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2020-12-22 07:04:52,515 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604323854] [2020-12-22 07:04:52,516 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-12-22 07:04:52,516 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:04:52,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-12-22 07:04:52,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=332, Invalid=480, Unknown=0, NotChecked=0, Total=812 [2020-12-22 07:04:52,517 INFO L87 Difference]: Start difference. First operand 81 states and 82 transitions. Second operand 29 states. [2020-12-22 07:04:52,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:04:52,936 INFO L93 Difference]: Finished difference Result 88 states and 89 transitions. [2020-12-22 07:04:52,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-12-22 07:04:52,937 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 148 [2020-12-22 07:04:52,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:04:52,938 INFO L225 Difference]: With dead ends: 88 [2020-12-22 07:04:52,938 INFO L226 Difference]: Without dead ends: 84 [2020-12-22 07:04:52,940 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 195 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 552 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1004, Invalid=1752, Unknown=0, NotChecked=0, Total=2756 [2020-12-22 07:04:52,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-12-22 07:04:52,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2020-12-22 07:04:52,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-12-22 07:04:52,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 85 transitions. [2020-12-22 07:04:52,949 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 85 transitions. Word has length 148 [2020-12-22 07:04:52,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:04:52,949 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 85 transitions. [2020-12-22 07:04:52,949 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-12-22 07:04:52,949 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 85 transitions. [2020-12-22 07:04:52,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2020-12-22 07:04:52,954 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:04:52,954 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:04:53,161 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-12-22 07:04:53,162 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:04:53,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:04:53,163 INFO L82 PathProgramCache]: Analyzing trace with hash 1715345484, now seen corresponding path program 24 times [2020-12-22 07:04:53,163 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:04:53,163 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537781663] [2020-12-22 07:04:53,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:04:53,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:53,213 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:53,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:53,271 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:53,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:53,328 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:53,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:53,379 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:53,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:53,430 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:53,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:53,479 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:53,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:53,527 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:53,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:53,572 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:53,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:53,631 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:53,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:53,672 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:53,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:53,712 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:53,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:53,751 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:53,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:53,788 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:53,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:53,823 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:53,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:53,858 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:53,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:53,892 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:53,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:53,926 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:53,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:53,983 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:53,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:54,015 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:54,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:54,047 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:54,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:54,080 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:54,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:54,111 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:54,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:54,141 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:54,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:54,172 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:54,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:54,205 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:54,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:54,435 INFO L134 CoverageAnalysis]: Checked inductivity of 1752 backedges. 0 proven. 876 refuted. 0 times theorem prover too weak. 876 trivial. 0 not checked. [2020-12-22 07:04:54,436 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537781663] [2020-12-22 07:04:54,436 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072224143] [2020-12-22 07:04:54,436 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 07:04:54,583 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2020-12-22 07:04:54,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 07:04:54,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 489 conjuncts, 52 conjunts are in the unsatisfiable core [2020-12-22 07:04:54,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 07:04:54,804 INFO L134 CoverageAnalysis]: Checked inductivity of 1752 backedges. 0 proven. 876 refuted. 0 times theorem prover too weak. 876 trivial. 0 not checked. [2020-12-22 07:04:54,804 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 07:04:54,804 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2020-12-22 07:04:54,804 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686404678] [2020-12-22 07:04:54,805 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-12-22 07:04:54,805 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:04:54,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-12-22 07:04:54,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=358, Invalid=512, Unknown=0, NotChecked=0, Total=870 [2020-12-22 07:04:54,806 INFO L87 Difference]: Start difference. First operand 84 states and 85 transitions. Second operand 30 states. [2020-12-22 07:04:55,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:04:55,220 INFO L93 Difference]: Finished difference Result 91 states and 92 transitions. [2020-12-22 07:04:55,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-12-22 07:04:55,221 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 154 [2020-12-22 07:04:55,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:04:55,222 INFO L225 Difference]: With dead ends: 91 [2020-12-22 07:04:55,222 INFO L226 Difference]: Without dead ends: 87 [2020-12-22 07:04:55,224 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 203 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 600 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1083, Invalid=1887, Unknown=0, NotChecked=0, Total=2970 [2020-12-22 07:04:55,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-12-22 07:04:55,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2020-12-22 07:04:55,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-12-22 07:04:55,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 88 transitions. [2020-12-22 07:04:55,228 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 88 transitions. Word has length 154 [2020-12-22 07:04:55,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:04:55,228 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 88 transitions. [2020-12-22 07:04:55,228 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-12-22 07:04:55,228 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 88 transitions. [2020-12-22 07:04:55,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2020-12-22 07:04:55,230 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:04:55,230 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:04:55,444 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 07:04:55,445 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:04:55,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:04:55,446 INFO L82 PathProgramCache]: Analyzing trace with hash -678635050, now seen corresponding path program 25 times [2020-12-22 07:04:55,446 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:04:55,446 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839732008] [2020-12-22 07:04:55,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:04:55,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:55,631 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:55,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:55,788 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:55,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:55,904 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:55,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:56,014 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:56,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:56,128 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:56,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:56,260 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:56,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:56,369 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:56,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:56,476 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:56,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:56,584 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:56,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:56,691 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:56,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:56,794 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:56,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:56,896 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:56,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:56,999 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:57,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:57,103 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:57,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:57,213 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:57,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:57,322 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:57,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:57,435 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:57,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:57,556 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:57,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:57,676 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:57,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:57,790 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:57,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:57,920 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:57,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:58,039 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:58,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:58,168 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:58,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:58,294 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:58,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:58,430 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:58,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:58,672 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:04:58,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:59,341 INFO L134 CoverageAnalysis]: Checked inductivity of 1900 backedges. 924 proven. 50 refuted. 0 times theorem prover too weak. 926 trivial. 0 not checked. [2020-12-22 07:04:59,341 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839732008] [2020-12-22 07:04:59,341 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [898740594] [2020-12-22 07:04:59,341 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 07:04:59,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:04:59,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 507 conjuncts, 217 conjunts are in the unsatisfiable core [2020-12-22 07:04:59,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 07:05:05,188 INFO L134 CoverageAnalysis]: Checked inductivity of 1900 backedges. 49 proven. 950 refuted. 0 times theorem prover too weak. 901 trivial. 0 not checked. [2020-12-22 07:05:05,189 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 07:05:05,189 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 59] total 114 [2020-12-22 07:05:05,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321592441] [2020-12-22 07:05:05,189 INFO L461 AbstractCegarLoop]: Interpolant automaton has 114 states [2020-12-22 07:05:05,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:05:05,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2020-12-22 07:05:05,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=835, Invalid=12047, Unknown=0, NotChecked=0, Total=12882 [2020-12-22 07:05:05,193 INFO L87 Difference]: Start difference. First operand 87 states and 88 transitions. Second operand 114 states. [2020-12-22 07:05:15,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:05:15,001 INFO L93 Difference]: Finished difference Result 90 states and 92 transitions. [2020-12-22 07:05:15,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2020-12-22 07:05:15,002 INFO L78 Accepts]: Start accepts. Automaton has 114 states. Word has length 160 [2020-12-22 07:05:15,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:05:15,003 INFO L225 Difference]: With dead ends: 90 [2020-12-22 07:05:15,003 INFO L226 Difference]: Without dead ends: 0 [2020-12-22 07:05:15,009 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 324 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 168 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5333 ImplicationChecksByTransitivity, 14.0s TimeCoverageRelationStatistics Valid=1975, Invalid=26755, Unknown=0, NotChecked=0, Total=28730 [2020-12-22 07:05:15,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-12-22 07:05:15,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-12-22 07:05:15,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-12-22 07:05:15,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-12-22 07:05:15,010 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 160 [2020-12-22 07:05:15,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:05:15,010 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-12-22 07:05:15,010 INFO L482 AbstractCegarLoop]: Interpolant automaton has 114 states. [2020-12-22 07:05:15,010 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-12-22 07:05:15,010 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-12-22 07:05:15,223 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-12-22 07:05:15,227 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-12-22 07:05:15,260 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-12-22 07:05:15,261 INFO L189 CegarLoopUtils]: For program point L-1(line -1) no Hoare annotation was computed. [2020-12-22 07:05:15,261 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-12-22 07:05:15,261 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-12-22 07:05:15,261 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 18) no Hoare annotation was computed. [2020-12-22 07:05:15,261 INFO L189 CegarLoopUtils]: For program point L18(line 18) no Hoare annotation was computed. [2020-12-22 07:05:15,261 INFO L189 CegarLoopUtils]: For program point L17(lines 17 19) no Hoare annotation was computed. [2020-12-22 07:05:15,262 INFO L185 CegarLoopUtils]: At program point L16(line 16) the Hoare annotation is: (and (= ULTIMATE.start_main_~a~0 25) (= ULTIMATE.start_main_~b~0 0)) [2020-12-22 07:05:15,262 INFO L189 CegarLoopUtils]: For program point L16-1(line 16) no Hoare annotation was computed. [2020-12-22 07:05:15,262 INFO L189 CegarLoopUtils]: For program point L13(lines 13 20) no Hoare annotation was computed. [2020-12-22 07:05:15,262 INFO L189 CegarLoopUtils]: For program point sumEXIT(lines 5 11) no Hoare annotation was computed. [2020-12-22 07:05:15,262 INFO L185 CegarLoopUtils]: At program point L9(line 9) the Hoare annotation is: (and (= sum_~n |sum_#in~n|) (<= 1 sum_~n) (= sum_~m |sum_#in~m|)) [2020-12-22 07:05:15,262 INFO L189 CegarLoopUtils]: For program point L9-1(line 9) no Hoare annotation was computed. [2020-12-22 07:05:15,262 INFO L189 CegarLoopUtils]: For program point L6(lines 6 10) no Hoare annotation was computed. [2020-12-22 07:05:15,262 INFO L189 CegarLoopUtils]: For program point sumFINAL(lines 5 11) no Hoare annotation was computed. [2020-12-22 07:05:15,262 INFO L192 CegarLoopUtils]: At program point sumENTRY(lines 5 11) the Hoare annotation is: true [2020-12-22 07:05:15,274 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.12 07:05:15 BoogieIcfgContainer [2020-12-22 07:05:15,275 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-22 07:05:15,275 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-22 07:05:15,275 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-22 07:05:15,276 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-22 07:05:15,276 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:04:23" (3/4) ... [2020-12-22 07:05:15,279 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-12-22 07:05:15,288 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure sum [2020-12-22 07:05:15,296 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 9 nodes and edges [2020-12-22 07:05:15,296 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2020-12-22 07:05:15,297 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-12-22 07:05:15,297 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-12-22 07:05:15,341 INFO L141 WitnessManager]: Wrote witness to /storage/repos/svcomp/c/recursive-simple/sum_25x0-1.c-witness.graphml [2020-12-22 07:05:15,342 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-22 07:05:15,343 INFO L168 Benchmark]: Toolchain (without parser) took 52465.42 ms. Allocated memory was 155.2 MB in the beginning and 729.8 MB in the end (delta: 574.6 MB). Free memory was 130.0 MB in the beginning and 420.3 MB in the end (delta: -290.3 MB). Peak memory consumption was 284.9 MB. Max. memory is 8.0 GB. [2020-12-22 07:05:15,344 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 155.2 MB. Free memory was 127.7 MB in the beginning and 127.3 MB in the end (delta: 419.4 kB). There was no memory consumed. Max. memory is 8.0 GB. [2020-12-22 07:05:15,345 INFO L168 Benchmark]: CACSL2BoogieTranslator took 224.77 ms. Allocated memory is still 155.2 MB. Free memory was 129.8 MB in the beginning and 120.6 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-12-22 07:05:15,345 INFO L168 Benchmark]: Boogie Procedure Inliner took 31.78 ms. Allocated memory is still 155.2 MB. Free memory was 120.6 MB in the beginning and 119.2 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-22 07:05:15,346 INFO L168 Benchmark]: Boogie Preprocessor took 19.22 ms. Allocated memory is still 155.2 MB. Free memory was 119.2 MB in the beginning and 118.3 MB in the end (delta: 951.5 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-22 07:05:15,346 INFO L168 Benchmark]: RCFGBuilder took 311.81 ms. Allocated memory is still 155.2 MB. Free memory was 118.3 MB in the beginning and 106.5 MB in the end (delta: 11.8 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. [2020-12-22 07:05:15,347 INFO L168 Benchmark]: TraceAbstraction took 51801.23 ms. Allocated memory was 155.2 MB in the beginning and 729.8 MB in the end (delta: 574.6 MB). Free memory was 105.9 MB in the beginning and 422.4 MB in the end (delta: -316.5 MB). Peak memory consumption was 258.7 MB. Max. memory is 8.0 GB. [2020-12-22 07:05:15,347 INFO L168 Benchmark]: Witness Printer took 66.47 ms. Allocated memory is still 729.8 MB. Free memory was 422.4 MB in the beginning and 420.3 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-12-22 07:05:15,349 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 155.2 MB. Free memory was 127.7 MB in the beginning and 127.3 MB in the end (delta: 419.4 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 224.77 ms. Allocated memory is still 155.2 MB. Free memory was 129.8 MB in the beginning and 120.6 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 31.78 ms. Allocated memory is still 155.2 MB. Free memory was 120.6 MB in the beginning and 119.2 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 19.22 ms. Allocated memory is still 155.2 MB. Free memory was 119.2 MB in the beginning and 118.3 MB in the end (delta: 951.5 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 311.81 ms. Allocated memory is still 155.2 MB. Free memory was 118.3 MB in the beginning and 106.5 MB in the end (delta: 11.8 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. * TraceAbstraction took 51801.23 ms. Allocated memory was 155.2 MB in the beginning and 729.8 MB in the end (delta: 574.6 MB). Free memory was 105.9 MB in the beginning and 422.4 MB in the end (delta: -316.5 MB). Peak memory consumption was 258.7 MB. Max. memory is 8.0 GB. * Witness Printer took 66.47 ms. Allocated memory is still 729.8 MB. Free memory was 422.4 MB in the beginning and 420.3 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 18]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 16 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 51.6s, OverallIterations: 26, TraceHistogramMax: 26, AutomataDifference: 15.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 258 SDtfs, 1214 SDslu, 2994 SDs, 0 SdLazy, 4849 SolverSat, 407 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 3.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 3715 GetRequests, 2823 SyntacticMatches, 0 SemanticMatches, 892 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10533 ImplicationChecksByTransitivity, 22.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=87occurred in iteration=25, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 26 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 3 LocationsWithAnnotation, 5 PreInvPairs, 5 NumberOfFragments, 18 HoareAnnotationTreeSize, 5 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 3 FomulaSimplificationsInter, 3 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.4s SsaConstructionTime, 1.9s SatisfiabilityAnalysisTime, 27.0s InterpolantComputationTime, 4410 NumberOfCodeBlocks, 4410 NumberOfCodeBlocksAsserted, 223 NumberOfCheckSat, 4359 ConstructedInterpolants, 0 QuantifiedInterpolants, 1463982 SizeOfPredicates, 379 NumberOfNonLiveVariables, 7275 ConjunctsInSsa, 913 ConjunctsInUnsatCore, 51 InterpolantComputations, 1 PerfectInterpolantSequences, 17800/33800 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...