/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-DerefFreeMemtrack-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/array-memsafety/openbsd_cstrnlen-alloca-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 19:00:45,750 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 19:00:45,754 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 19:00:45,814 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 19:00:45,815 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 19:00:45,819 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 19:00:45,823 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 19:00:45,831 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 19:00:45,836 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 19:00:45,840 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 19:00:45,841 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 19:00:45,843 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 19:00:45,843 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 19:00:45,850 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 19:00:45,854 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 19:00:45,856 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 19:00:45,858 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 19:00:45,862 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 19:00:45,869 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 19:00:45,876 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 19:00:45,880 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 19:00:45,881 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 19:00:45,883 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 19:00:45,884 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 19:00:45,889 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 19:00:45,899 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 19:00:45,900 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 19:00:45,902 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 19:00:45,903 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 19:00:45,904 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 19:00:45,905 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 19:00:45,905 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 19:00:45,906 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 19:00:45,906 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 19:00:45,907 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 19:00:45,908 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 19:00:45,909 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-64bit-Automizer_Default.epf [2020-12-22 19:00:45,972 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 19:00:45,972 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 19:00:45,978 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 19:00:45,978 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 19:00:45,978 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 19:00:45,978 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 19:00:45,979 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-12-22 19:00:45,979 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 19:00:45,979 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 19:00:45,980 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-12-22 19:00:45,981 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-12-22 19:00:45,981 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-12-22 19:00:45,981 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 19:00:45,982 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-22 19:00:45,982 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 19:00:45,982 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 19:00:45,996 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 19:00:45,996 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 19:00:45,996 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 19:00:45,996 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 19:00:45,997 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 19:00:45,997 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 19:00:45,997 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 19:00:45,998 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 19:00:45,998 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 19:00:46,406 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 19:00:46,445 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 19:00:46,449 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 19:00:46,450 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 19:00:46,451 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 19:00:46,452 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-memsafety/openbsd_cstrnlen-alloca-1.i [2020-12-22 19:00:46,548 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/29e10fa00/adc3428639c14449b615466320b07237/FLAG221651fc1 [2020-12-22 19:00:47,215 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 19:00:47,216 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-memsafety/openbsd_cstrnlen-alloca-1.i [2020-12-22 19:00:47,244 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/29e10fa00/adc3428639c14449b615466320b07237/FLAG221651fc1 [2020-12-22 19:00:47,495 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/29e10fa00/adc3428639c14449b615466320b07237 [2020-12-22 19:00:47,499 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 19:00:47,502 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 19:00:47,504 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 19:00:47,505 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 19:00:47,510 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 19:00:47,512 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:00:47" (1/1) ... [2020-12-22 19:00:47,515 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1a23fc66 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:00:47, skipping insertion in model container [2020-12-22 19:00:47,515 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:00:47" (1/1) ... [2020-12-22 19:00:47,531 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 19:00:47,604 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 19:00:48,065 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 19:00:48,082 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 19:00:48,165 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 19:00:48,240 INFO L208 MainTranslator]: Completed translation [2020-12-22 19:00:48,240 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:00:48 WrapperNode [2020-12-22 19:00:48,240 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 19:00:48,242 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 19:00:48,242 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 19:00:48,242 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 19:00:48,253 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:00:48" (1/1) ... [2020-12-22 19:00:48,283 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:00:48" (1/1) ... [2020-12-22 19:00:48,319 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 19:00:48,321 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 19:00:48,322 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 19:00:48,322 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 19:00:48,332 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:00:48" (1/1) ... [2020-12-22 19:00:48,332 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:00:48" (1/1) ... [2020-12-22 19:00:48,349 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:00:48" (1/1) ... [2020-12-22 19:00:48,349 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:00:48" (1/1) ... [2020-12-22 19:00:48,355 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:00:48" (1/1) ... [2020-12-22 19:00:48,360 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:00:48" (1/1) ... [2020-12-22 19:00:48,362 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:00:48" (1/1) ... [2020-12-22 19:00:48,365 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 19:00:48,366 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 19:00:48,366 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 19:00:48,366 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 19:00:48,367 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:00:48" (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 19:00:48,475 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-22 19:00:48,476 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-22 19:00:48,476 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 19:00:48,476 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-22 19:00:48,476 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 19:00:48,476 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 19:00:48,950 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 19:00:48,951 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2020-12-22 19:00:48,956 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:00:48 BoogieIcfgContainer [2020-12-22 19:00:48,956 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 19:00:48,961 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 19:00:48,962 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 19:00:48,969 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 19:00:48,970 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 07:00:47" (1/3) ... [2020-12-22 19:00:48,971 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@471e30ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 07:00:48, skipping insertion in model container [2020-12-22 19:00:48,971 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:00:48" (2/3) ... [2020-12-22 19:00:48,974 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@471e30ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 07:00:48, skipping insertion in model container [2020-12-22 19:00:48,974 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:00:48" (3/3) ... [2020-12-22 19:00:48,976 INFO L111 eAbstractionObserver]: Analyzing ICFG openbsd_cstrnlen-alloca-1.i [2020-12-22 19:00:48,985 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 19:00:48,991 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 7 error locations. [2020-12-22 19:00:49,015 INFO L253 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2020-12-22 19:00:49,056 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 19:00:49,056 INFO L378 AbstractCegarLoop]: Hoare is false [2020-12-22 19:00:49,056 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 19:00:49,057 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 19:00:49,057 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 19:00:49,057 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 19:00:49,057 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 19:00:49,057 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 19:00:49,078 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2020-12-22 19:00:49,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-22 19:00:49,085 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:00:49,086 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:00:49,087 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 19:00:49,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:00:49,095 INFO L82 PathProgramCache]: Analyzing trace with hash 1805029043, now seen corresponding path program 1 times [2020-12-22 19:00:49,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:00:49,106 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144852147] [2020-12-22 19:00:49,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:00:49,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:00:49,371 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 19:00:49,371 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144852147] [2020-12-22 19:00:49,373 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 19:00:49,373 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 19:00:49,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719681041] [2020-12-22 19:00:49,379 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 19:00:49,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:00:49,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 19:00:49,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 19:00:49,400 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 3 states. [2020-12-22 19:00:49,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:00:49,485 INFO L93 Difference]: Finished difference Result 27 states and 31 transitions. [2020-12-22 19:00:49,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 19:00:49,487 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 7 [2020-12-22 19:00:49,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:00:49,497 INFO L225 Difference]: With dead ends: 27 [2020-12-22 19:00:49,498 INFO L226 Difference]: Without dead ends: 25 [2020-12-22 19:00:49,500 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 19:00:49,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-12-22 19:00:49,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-12-22 19:00:49,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-12-22 19:00:49,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2020-12-22 19:00:49,535 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 7 [2020-12-22 19:00:49,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:00:49,535 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2020-12-22 19:00:49,535 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 19:00:49,536 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2020-12-22 19:00:49,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-22 19:00:49,536 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:00:49,536 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:00:49,537 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 19:00:49,537 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 19:00:49,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:00:49,538 INFO L82 PathProgramCache]: Analyzing trace with hash 1805029044, now seen corresponding path program 1 times [2020-12-22 19:00:49,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:00:49,539 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964974416] [2020-12-22 19:00:49,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:00:49,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:00:49,611 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 19:00:49,612 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964974416] [2020-12-22 19:00:49,612 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 19:00:49,612 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 19:00:49,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405709249] [2020-12-22 19:00:49,614 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 19:00:49,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:00:49,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 19:00:49,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 19:00:49,616 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand 4 states. [2020-12-22 19:00:49,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:00:49,657 INFO L93 Difference]: Finished difference Result 24 states and 28 transitions. [2020-12-22 19:00:49,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 19:00:49,658 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2020-12-22 19:00:49,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:00:49,659 INFO L225 Difference]: With dead ends: 24 [2020-12-22 19:00:49,659 INFO L226 Difference]: Without dead ends: 24 [2020-12-22 19:00:49,660 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 19:00:49,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-12-22 19:00:49,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-12-22 19:00:49,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-12-22 19:00:49,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2020-12-22 19:00:49,665 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 7 [2020-12-22 19:00:49,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:00:49,665 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2020-12-22 19:00:49,665 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 19:00:49,665 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2020-12-22 19:00:49,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-22 19:00:49,666 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:00:49,666 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:00:49,666 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 19:00:49,666 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 19:00:49,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:00:49,667 INFO L82 PathProgramCache]: Analyzing trace with hash 1805029097, now seen corresponding path program 1 times [2020-12-22 19:00:49,667 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:00:49,668 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928966436] [2020-12-22 19:00:49,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:00:49,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:00:49,728 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 19:00:49,729 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928966436] [2020-12-22 19:00:49,729 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 19:00:49,729 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 19:00:49,729 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949844851] [2020-12-22 19:00:49,730 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 19:00:49,730 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:00:49,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 19:00:49,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 19:00:49,732 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand 4 states. [2020-12-22 19:00:49,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:00:49,766 INFO L93 Difference]: Finished difference Result 41 states and 47 transitions. [2020-12-22 19:00:49,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 19:00:49,767 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2020-12-22 19:00:49,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:00:49,769 INFO L225 Difference]: With dead ends: 41 [2020-12-22 19:00:49,769 INFO L226 Difference]: Without dead ends: 41 [2020-12-22 19:00:49,769 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 19:00:49,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-12-22 19:00:49,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 27. [2020-12-22 19:00:49,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-12-22 19:00:49,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 32 transitions. [2020-12-22 19:00:49,775 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 32 transitions. Word has length 7 [2020-12-22 19:00:49,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:00:49,776 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 32 transitions. [2020-12-22 19:00:49,776 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 19:00:49,776 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 32 transitions. [2020-12-22 19:00:49,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-22 19:00:49,777 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:00:49,777 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:00:49,777 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 19:00:49,778 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 19:00:49,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:00:49,779 INFO L82 PathProgramCache]: Analyzing trace with hash 1806876139, now seen corresponding path program 1 times [2020-12-22 19:00:49,779 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:00:49,779 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42920616] [2020-12-22 19:00:49,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:00:49,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:00:49,872 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 19:00:49,873 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42920616] [2020-12-22 19:00:49,873 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 19:00:49,873 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 19:00:49,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766381062] [2020-12-22 19:00:49,874 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 19:00:49,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:00:49,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 19:00:49,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 19:00:49,876 INFO L87 Difference]: Start difference. First operand 27 states and 32 transitions. Second operand 5 states. [2020-12-22 19:00:49,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:00:49,958 INFO L93 Difference]: Finished difference Result 45 states and 52 transitions. [2020-12-22 19:00:49,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 19:00:49,959 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 7 [2020-12-22 19:00:49,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:00:49,961 INFO L225 Difference]: With dead ends: 45 [2020-12-22 19:00:49,961 INFO L226 Difference]: Without dead ends: 45 [2020-12-22 19:00:49,961 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 19:00:49,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-12-22 19:00:49,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 29. [2020-12-22 19:00:49,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-12-22 19:00:49,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2020-12-22 19:00:49,967 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 35 transitions. Word has length 7 [2020-12-22 19:00:49,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:00:49,967 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 35 transitions. [2020-12-22 19:00:49,967 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 19:00:49,967 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2020-12-22 19:00:49,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-22 19:00:49,968 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:00:49,968 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:00:49,969 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 19:00:49,969 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 19:00:49,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:00:49,970 INFO L82 PathProgramCache]: Analyzing trace with hash -1954750824, now seen corresponding path program 1 times [2020-12-22 19:00:49,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:00:49,970 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698646886] [2020-12-22 19:00:49,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:00:49,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:00:50,022 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 19:00:50,023 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698646886] [2020-12-22 19:00:50,023 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 19:00:50,023 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 19:00:50,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578656954] [2020-12-22 19:00:50,024 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 19:00:50,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:00:50,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 19:00:50,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 19:00:50,026 INFO L87 Difference]: Start difference. First operand 29 states and 35 transitions. Second operand 4 states. [2020-12-22 19:00:50,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:00:50,101 INFO L93 Difference]: Finished difference Result 28 states and 34 transitions. [2020-12-22 19:00:50,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 19:00:50,102 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2020-12-22 19:00:50,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:00:50,103 INFO L225 Difference]: With dead ends: 28 [2020-12-22 19:00:50,103 INFO L226 Difference]: Without dead ends: 28 [2020-12-22 19:00:50,104 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 19:00:50,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-12-22 19:00:50,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-12-22 19:00:50,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-12-22 19:00:50,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2020-12-22 19:00:50,108 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 34 transitions. Word has length 11 [2020-12-22 19:00:50,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:00:50,108 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 34 transitions. [2020-12-22 19:00:50,109 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 19:00:50,109 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2020-12-22 19:00:50,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-22 19:00:50,109 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:00:50,110 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:00:50,110 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 19:00:50,110 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 19:00:50,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:00:50,111 INFO L82 PathProgramCache]: Analyzing trace with hash -1954750823, now seen corresponding path program 1 times [2020-12-22 19:00:50,111 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:00:50,111 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730949610] [2020-12-22 19:00:50,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:00:50,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:00:50,210 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 19:00:50,211 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730949610] [2020-12-22 19:00:50,211 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 19:00:50,211 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 19:00:50,212 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39507887] [2020-12-22 19:00:50,212 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 19:00:50,212 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:00:50,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 19:00:50,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 19:00:50,214 INFO L87 Difference]: Start difference. First operand 28 states and 34 transitions. Second operand 6 states. [2020-12-22 19:00:50,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:00:50,341 INFO L93 Difference]: Finished difference Result 38 states and 45 transitions. [2020-12-22 19:00:50,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 19:00:50,342 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2020-12-22 19:00:50,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:00:50,344 INFO L225 Difference]: With dead ends: 38 [2020-12-22 19:00:50,344 INFO L226 Difference]: Without dead ends: 38 [2020-12-22 19:00:50,346 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-12-22 19:00:50,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-12-22 19:00:50,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 31. [2020-12-22 19:00:50,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-12-22 19:00:50,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 38 transitions. [2020-12-22 19:00:50,356 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 38 transitions. Word has length 11 [2020-12-22 19:00:50,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:00:50,357 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 38 transitions. [2020-12-22 19:00:50,357 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 19:00:50,357 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 38 transitions. [2020-12-22 19:00:50,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-22 19:00:50,358 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:00:50,358 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:00:50,359 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 19:00:50,359 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 19:00:50,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:00:50,362 INFO L82 PathProgramCache]: Analyzing trace with hash -1226025170, now seen corresponding path program 1 times [2020-12-22 19:00:50,363 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:00:50,367 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722088563] [2020-12-22 19:00:50,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:00:50,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:00:50,484 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:00:50,484 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722088563] [2020-12-22 19:00:50,485 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [772362650] [2020-12-22 19:00:50,485 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 19:00:50,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:00:50,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-22 19:00:50,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:00:50,652 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2020-12-22 19:00:50,653 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:00:50,660 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:00:50,661 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:00:50,661 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2020-12-22 19:00:50,717 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:00:50,718 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:00:50,718 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-12-22 19:00:50,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236186434] [2020-12-22 19:00:50,719 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 19:00:50,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:00:50,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 19:00:50,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-22 19:00:50,720 INFO L87 Difference]: Start difference. First operand 31 states and 38 transitions. Second operand 6 states. [2020-12-22 19:00:50,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:00:50,810 INFO L93 Difference]: Finished difference Result 48 states and 57 transitions. [2020-12-22 19:00:50,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 19:00:50,811 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2020-12-22 19:00:50,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:00:50,812 INFO L225 Difference]: With dead ends: 48 [2020-12-22 19:00:50,812 INFO L226 Difference]: Without dead ends: 48 [2020-12-22 19:00:50,812 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2020-12-22 19:00:50,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-12-22 19:00:50,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 28. [2020-12-22 19:00:50,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-12-22 19:00:50,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2020-12-22 19:00:50,816 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 34 transitions. Word has length 11 [2020-12-22 19:00:50,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:00:50,816 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 34 transitions. [2020-12-22 19:00:50,817 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 19:00:50,817 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2020-12-22 19:00:50,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 19:00:50,817 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:00:50,817 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:00:51,030 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-12-22 19:00:51,031 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 19:00:51,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:00:51,032 INFO L82 PathProgramCache]: Analyzing trace with hash 1485608773, now seen corresponding path program 1 times [2020-12-22 19:00:51,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:00:51,033 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410933031] [2020-12-22 19:00:51,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:00:51,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:00:51,109 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 19:00:51,110 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410933031] [2020-12-22 19:00:51,111 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 19:00:51,111 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 19:00:51,111 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715859194] [2020-12-22 19:00:51,112 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 19:00:51,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:00:51,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 19:00:51,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 19:00:51,119 INFO L87 Difference]: Start difference. First operand 28 states and 34 transitions. Second operand 5 states. [2020-12-22 19:00:51,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:00:51,185 INFO L93 Difference]: Finished difference Result 58 states and 66 transitions. [2020-12-22 19:00:51,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 19:00:51,185 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-12-22 19:00:51,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:00:51,186 INFO L225 Difference]: With dead ends: 58 [2020-12-22 19:00:51,186 INFO L226 Difference]: Without dead ends: 58 [2020-12-22 19:00:51,186 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-12-22 19:00:51,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-12-22 19:00:51,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 39. [2020-12-22 19:00:51,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-12-22 19:00:51,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 46 transitions. [2020-12-22 19:00:51,201 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 46 transitions. Word has length 14 [2020-12-22 19:00:51,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:00:51,201 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 46 transitions. [2020-12-22 19:00:51,201 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 19:00:51,202 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 46 transitions. [2020-12-22 19:00:51,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 19:00:51,203 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:00:51,203 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:00:51,203 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 19:00:51,203 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 19:00:51,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:00:51,204 INFO L82 PathProgramCache]: Analyzing trace with hash -2108293945, now seen corresponding path program 1 times [2020-12-22 19:00:51,204 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:00:51,204 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395942337] [2020-12-22 19:00:51,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:00:51,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:00:51,328 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 19:00:51,328 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395942337] [2020-12-22 19:00:51,329 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 19:00:51,330 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 19:00:51,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923943104] [2020-12-22 19:00:51,330 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 19:00:51,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:00:51,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 19:00:51,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 19:00:51,335 INFO L87 Difference]: Start difference. First operand 39 states and 46 transitions. Second operand 6 states. [2020-12-22 19:00:51,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:00:51,411 INFO L93 Difference]: Finished difference Result 46 states and 52 transitions. [2020-12-22 19:00:51,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 19:00:51,411 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 14 [2020-12-22 19:00:51,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:00:51,415 INFO L225 Difference]: With dead ends: 46 [2020-12-22 19:00:51,415 INFO L226 Difference]: Without dead ends: 46 [2020-12-22 19:00:51,416 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 19:00:51,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-12-22 19:00:51,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 28. [2020-12-22 19:00:51,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-12-22 19:00:51,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2020-12-22 19:00:51,429 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 14 [2020-12-22 19:00:51,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:00:51,429 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2020-12-22 19:00:51,429 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 19:00:51,429 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2020-12-22 19:00:51,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-22 19:00:51,430 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:00:51,430 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:00:51,431 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 19:00:51,431 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 19:00:51,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:00:51,432 INFO L82 PathProgramCache]: Analyzing trace with hash 439942402, now seen corresponding path program 1 times [2020-12-22 19:00:51,435 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:00:51,435 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036777775] [2020-12-22 19:00:51,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:00:51,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:00:51,556 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 19:00:51,557 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036777775] [2020-12-22 19:00:51,557 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 19:00:51,557 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 19:00:51,557 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743880004] [2020-12-22 19:00:51,558 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 19:00:51,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:00:51,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 19:00:51,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 19:00:51,561 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand 4 states. [2020-12-22 19:00:51,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:00:51,578 INFO L93 Difference]: Finished difference Result 27 states and 32 transitions. [2020-12-22 19:00:51,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 19:00:51,579 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2020-12-22 19:00:51,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:00:51,580 INFO L225 Difference]: With dead ends: 27 [2020-12-22 19:00:51,580 INFO L226 Difference]: Without dead ends: 24 [2020-12-22 19:00:51,581 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 19:00:51,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-12-22 19:00:51,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-12-22 19:00:51,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-12-22 19:00:51,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions. [2020-12-22 19:00:51,584 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 16 [2020-12-22 19:00:51,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:00:51,584 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 29 transitions. [2020-12-22 19:00:51,584 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 19:00:51,584 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions. [2020-12-22 19:00:51,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-22 19:00:51,585 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:00:51,585 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:00:51,586 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 19:00:51,586 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 19:00:51,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:00:51,586 INFO L82 PathProgramCache]: Analyzing trace with hash 755017713, now seen corresponding path program 1 times [2020-12-22 19:00:51,587 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:00:51,587 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120229224] [2020-12-22 19:00:51,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:00:51,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:00:51,707 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:00:51,708 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120229224] [2020-12-22 19:00:51,708 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [724255820] [2020-12-22 19:00:51,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 19:00:51,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:00:51,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-22 19:00:51,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:00:51,795 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2020-12-22 19:00:51,796 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:00:51,800 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:00:51,801 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:00:51,801 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:11 [2020-12-22 19:00:51,898 INFO L173 IndexEqualityManager]: detected equality via solver [2020-12-22 19:00:51,900 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:00:51,901 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 10 [2020-12-22 19:00:51,902 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:00:51,909 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:00:51,912 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:00:51,913 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:24, output treesize:3 [2020-12-22 19:00:51,929 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:00:51,930 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 19:00:51,930 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [6] total 11 [2020-12-22 19:00:51,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917422425] [2020-12-22 19:00:51,931 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 19:00:51,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:00:51,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 19:00:51,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2020-12-22 19:00:51,932 INFO L87 Difference]: Start difference. First operand 24 states and 29 transitions. Second operand 8 states. [2020-12-22 19:00:52,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:00:52,053 INFO L93 Difference]: Finished difference Result 32 states and 35 transitions. [2020-12-22 19:00:52,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 19:00:52,054 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 17 [2020-12-22 19:00:52,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:00:52,054 INFO L225 Difference]: With dead ends: 32 [2020-12-22 19:00:52,055 INFO L226 Difference]: Without dead ends: 21 [2020-12-22 19:00:52,055 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2020-12-22 19:00:52,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-12-22 19:00:52,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-12-22 19:00:52,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-12-22 19:00:52,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2020-12-22 19:00:52,057 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 17 [2020-12-22 19:00:52,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:00:52,057 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2020-12-22 19:00:52,057 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 19:00:52,057 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2020-12-22 19:00:52,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-22 19:00:52,058 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:00:52,058 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:00:52,272 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:00:52,273 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 19:00:52,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:00:52,274 INFO L82 PathProgramCache]: Analyzing trace with hash -524845965, now seen corresponding path program 1 times [2020-12-22 19:00:52,275 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:00:52,275 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734984734] [2020-12-22 19:00:52,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:00:52,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:00:52,339 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:00:52,340 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734984734] [2020-12-22 19:00:52,340 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1159688049] [2020-12-22 19:00:52,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 19:00:52,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:00:52,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 22 conjunts are in the unsatisfiable core [2020-12-22 19:00:52,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:00:52,461 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2020-12-22 19:00:52,462 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:00:52,470 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:00:52,473 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-22 19:00:52,473 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:20 [2020-12-22 19:00:52,593 INFO L173 IndexEqualityManager]: detected equality via solver [2020-12-22 19:00:52,595 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:00:52,595 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 10 [2020-12-22 19:00:52,597 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:00:52,608 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:00:52,611 INFO L547 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:00:52,612 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:33, output treesize:3 [2020-12-22 19:00:52,631 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:00:52,631 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 19:00:52,631 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [6] total 12 [2020-12-22 19:00:52,632 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874435370] [2020-12-22 19:00:52,632 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 19:00:52,632 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:00:52,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 19:00:52,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-12-22 19:00:52,633 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand 9 states. [2020-12-22 19:00:52,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:00:52,846 INFO L93 Difference]: Finished difference Result 32 states and 34 transitions. [2020-12-22 19:00:52,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 19:00:52,847 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 17 [2020-12-22 19:00:52,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:00:52,848 INFO L225 Difference]: With dead ends: 32 [2020-12-22 19:00:52,848 INFO L226 Difference]: Without dead ends: 25 [2020-12-22 19:00:52,848 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2020-12-22 19:00:52,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-12-22 19:00:52,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 22. [2020-12-22 19:00:52,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-12-22 19:00:52,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2020-12-22 19:00:52,850 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 17 [2020-12-22 19:00:52,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:00:52,850 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2020-12-22 19:00:52,850 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 19:00:52,851 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2020-12-22 19:00:52,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-12-22 19:00:52,851 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:00:52,851 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:00:53,064 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-12-22 19:00:53,065 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 19:00:53,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:00:53,065 INFO L82 PathProgramCache]: Analyzing trace with hash -547316234, now seen corresponding path program 1 times [2020-12-22 19:00:53,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:00:53,066 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629533579] [2020-12-22 19:00:53,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:00:53,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:00:53,189 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:00:53,189 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629533579] [2020-12-22 19:00:53,189 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1892574615] [2020-12-22 19:00:53,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 19:00:53,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:00:53,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-22 19:00:53,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:00:53,399 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:00:53,400 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:00:53,400 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2020-12-22 19:00:53,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526852330] [2020-12-22 19:00:53,400 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-22 19:00:53,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:00:53,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-22 19:00:53,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2020-12-22 19:00:53,401 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand 13 states. [2020-12-22 19:00:53,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:00:53,548 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2020-12-22 19:00:53,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 19:00:53,548 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 21 [2020-12-22 19:00:53,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:00:53,549 INFO L225 Difference]: With dead ends: 34 [2020-12-22 19:00:53,549 INFO L226 Difference]: Without dead ends: 34 [2020-12-22 19:00:53,549 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2020-12-22 19:00:53,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-12-22 19:00:53,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 28. [2020-12-22 19:00:53,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-12-22 19:00:53,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2020-12-22 19:00:53,551 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 21 [2020-12-22 19:00:53,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:00:53,552 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2020-12-22 19:00:53,552 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-22 19:00:53,552 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2020-12-22 19:00:53,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-12-22 19:00:53,553 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:00:53,553 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:00:53,767 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:00:53,768 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 19:00:53,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:00:53,769 INFO L82 PathProgramCache]: Analyzing trace with hash -931353202, now seen corresponding path program 2 times [2020-12-22 19:00:53,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:00:53,769 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003009967] [2020-12-22 19:00:53,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:00:53,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:00:53,874 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 19:00:53,874 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003009967] [2020-12-22 19:00:53,874 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [193025929] [2020-12-22 19:00:53,875 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 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 19:00:53,935 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 19:00:53,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:00:53,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 28 conjunts are in the unsatisfiable core [2020-12-22 19:00:53,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:00:54,044 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2020-12-22 19:00:54,045 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:00:54,052 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:00:54,055 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-22 19:00:54,055 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:20 [2020-12-22 19:00:54,305 INFO L173 IndexEqualityManager]: detected equality via solver [2020-12-22 19:00:54,307 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:00:54,307 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 10 [2020-12-22 19:00:54,308 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:00:54,320 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:00:54,324 INFO L547 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:00:54,325 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:35, output treesize:3 [2020-12-22 19:00:54,371 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:00:54,372 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:00:54,372 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 12] total 16 [2020-12-22 19:00:54,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891545858] [2020-12-22 19:00:54,372 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-22 19:00:54,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:00:54,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-22 19:00:54,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2020-12-22 19:00:54,374 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 16 states. [2020-12-22 19:00:55,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:00:55,225 INFO L93 Difference]: Finished difference Result 81 states and 83 transitions. [2020-12-22 19:00:55,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-22 19:00:55,225 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 27 [2020-12-22 19:00:55,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:00:55,226 INFO L225 Difference]: With dead ends: 81 [2020-12-22 19:00:55,226 INFO L226 Difference]: Without dead ends: 35 [2020-12-22 19:00:55,227 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=206, Invalid=984, Unknown=0, NotChecked=0, Total=1190 [2020-12-22 19:00:55,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-12-22 19:00:55,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 32. [2020-12-22 19:00:55,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-12-22 19:00:55,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2020-12-22 19:00:55,229 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 27 [2020-12-22 19:00:55,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:00:55,229 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2020-12-22 19:00:55,230 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-22 19:00:55,230 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2020-12-22 19:00:55,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-12-22 19:00:55,230 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:00:55,231 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:00:55,440 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-22 19:00:55,441 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 19:00:55,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:00:55,442 INFO L82 PathProgramCache]: Analyzing trace with hash -711322097, now seen corresponding path program 1 times [2020-12-22 19:00:55,442 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:00:55,442 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213141043] [2020-12-22 19:00:55,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:00:55,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:00:55,559 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:00:55,559 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213141043] [2020-12-22 19:00:55,559 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2089202505] [2020-12-22 19:00:55,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 19:00:55,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:00:55,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2020-12-22 19:00:55,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:00:55,799 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:00:55,799 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:00:55,799 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2020-12-22 19:00:55,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204385478] [2020-12-22 19:00:55,800 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-22 19:00:55,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:00:55,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-22 19:00:55,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2020-12-22 19:00:55,801 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand 15 states. [2020-12-22 19:00:55,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:00:55,953 INFO L93 Difference]: Finished difference Result 41 states and 42 transitions. [2020-12-22 19:00:55,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 19:00:55,954 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 31 [2020-12-22 19:00:55,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:00:55,955 INFO L225 Difference]: With dead ends: 41 [2020-12-22 19:00:55,955 INFO L226 Difference]: Without dead ends: 41 [2020-12-22 19:00:55,956 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2020-12-22 19:00:55,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-12-22 19:00:55,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 38. [2020-12-22 19:00:55,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-12-22 19:00:55,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2020-12-22 19:00:55,958 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 31 [2020-12-22 19:00:55,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:00:55,959 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2020-12-22 19:00:55,959 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-22 19:00:55,959 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2020-12-22 19:00:55,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-12-22 19:00:55,960 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:00:55,960 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:00:56,173 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:00:56,174 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 19:00:56,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:00:56,175 INFO L82 PathProgramCache]: Analyzing trace with hash -2043154713, now seen corresponding path program 2 times [2020-12-22 19:00:56,175 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:00:56,176 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827262035] [2020-12-22 19:00:56,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:00:56,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:00:56,443 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 11 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:00:56,443 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827262035] [2020-12-22 19:00:56,444 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082298477] [2020-12-22 19:00:56,444 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 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 19:00:56,520 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 19:00:56,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:00:56,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 34 conjunts are in the unsatisfiable core [2020-12-22 19:00:56,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:00:56,604 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2020-12-22 19:00:56,605 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:00:56,611 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:00:56,616 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-22 19:00:56,616 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:21 [2020-12-22 19:00:56,993 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:00:56,993 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 18 [2020-12-22 19:00:56,995 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2020-12-22 19:00:57,009 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:00:57,012 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 19:00:57,016 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-12-22 19:00:57,018 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:00:57,019 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:36, output treesize:27 [2020-12-22 19:00:57,062 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 19:00:57,188 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 1 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:00:57,189 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:00:57,189 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2020-12-22 19:00:57,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313907281] [2020-12-22 19:00:57,190 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-12-22 19:00:57,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:00:57,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-12-22 19:00:57,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=542, Unknown=0, NotChecked=0, Total=600 [2020-12-22 19:00:57,191 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand 25 states. [2020-12-22 19:00:59,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:00:59,089 INFO L93 Difference]: Finished difference Result 73 states and 74 transitions. [2020-12-22 19:00:59,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-12-22 19:00:59,090 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 37 [2020-12-22 19:00:59,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:00:59,091 INFO L225 Difference]: With dead ends: 73 [2020-12-22 19:00:59,091 INFO L226 Difference]: Without dead ends: 54 [2020-12-22 19:00:59,092 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=294, Invalid=1598, Unknown=0, NotChecked=0, Total=1892 [2020-12-22 19:00:59,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-12-22 19:00:59,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 48. [2020-12-22 19:00:59,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-12-22 19:00:59,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2020-12-22 19:00:59,095 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 37 [2020-12-22 19:00:59,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:00:59,095 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2020-12-22 19:00:59,095 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-12-22 19:00:59,095 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2020-12-22 19:00:59,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-12-22 19:00:59,097 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:00:59,097 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:00:59,301 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-12-22 19:00:59,302 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 19:00:59,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:00:59,303 INFO L82 PathProgramCache]: Analyzing trace with hash -1644156286, now seen corresponding path program 3 times [2020-12-22 19:00:59,303 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:00:59,303 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153524843] [2020-12-22 19:00:59,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:00:59,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:00:59,656 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 15 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:00:59,657 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153524843] [2020-12-22 19:00:59,657 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1725762516] [2020-12-22 19:00:59,657 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 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 19:00:59,879 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-12-22 19:00:59,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:00:59,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 38 conjunts are in the unsatisfiable core [2020-12-22 19:00:59,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:01:00,062 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2020-12-22 19:01:00,063 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:01:00,069 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:01:00,070 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-22 19:01:00,071 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:21, output treesize:17 [2020-12-22 19:01:00,227 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2020-12-22 19:01:00,228 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:01:00,229 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:01:00,230 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:01:00,230 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:15, output treesize:3 [2020-12-22 19:01:00,240 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 15 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:01:00,240 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:01:00,240 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 23 [2020-12-22 19:01:00,241 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289215760] [2020-12-22 19:01:00,241 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-22 19:01:00,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:01:00,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-22 19:01:00,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=452, Unknown=0, NotChecked=0, Total=506 [2020-12-22 19:01:00,242 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 23 states. [2020-12-22 19:01:00,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:01:00,860 INFO L93 Difference]: Finished difference Result 80 states and 81 transitions. [2020-12-22 19:01:00,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-22 19:01:00,861 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 47 [2020-12-22 19:01:00,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:01:00,862 INFO L225 Difference]: With dead ends: 80 [2020-12-22 19:01:00,862 INFO L226 Difference]: Without dead ends: 55 [2020-12-22 19:01:00,863 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=150, Invalid=842, Unknown=0, NotChecked=0, Total=992 [2020-12-22 19:01:00,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-12-22 19:01:00,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 52. [2020-12-22 19:01:00,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-12-22 19:01:00,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 53 transitions. [2020-12-22 19:01:00,865 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 53 transitions. Word has length 47 [2020-12-22 19:01:00,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:01:00,866 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 53 transitions. [2020-12-22 19:01:00,866 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-22 19:01:00,866 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 53 transitions. [2020-12-22 19:01:00,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-12-22 19:01:00,867 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:01:00,867 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:01:01,080 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-22 19:01:01,081 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 19:01:01,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:01:01,082 INFO L82 PathProgramCache]: Analyzing trace with hash -241928763, now seen corresponding path program 4 times [2020-12-22 19:01:01,083 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:01:01,083 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860234607] [2020-12-22 19:01:01,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:01:01,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:01:01,355 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 6 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:01:01,356 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860234607] [2020-12-22 19:01:01,356 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [832203524] [2020-12-22 19:01:01,356 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 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 19:01:01,435 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 19:01:01,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:01:01,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 44 conjunts are in the unsatisfiable core [2020-12-22 19:01:01,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:01:01,466 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2020-12-22 19:01:01,467 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:01:01,473 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:01:01,473 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:01:01,474 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2020-12-22 19:01:01,552 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2020-12-22 19:01:01,553 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:01:01,559 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:01:01,560 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:01:01,560 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:23 [2020-12-22 19:01:01,805 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:01:01,805 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2020-12-22 19:01:01,807 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2020-12-22 19:01:01,818 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:01:01,819 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:01:01,820 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:24 [2020-12-22 19:01:01,864 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 19:01:01,866 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 19:01:02,028 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 18 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:01:02,028 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:01:02,028 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16] total 24 [2020-12-22 19:01:02,029 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299240761] [2020-12-22 19:01:02,029 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-12-22 19:01:02,029 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:01:02,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-12-22 19:01:02,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=539, Unknown=0, NotChecked=0, Total=600 [2020-12-22 19:01:02,030 INFO L87 Difference]: Start difference. First operand 52 states and 53 transitions. Second operand 25 states. [2020-12-22 19:01:02,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:01:02,933 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2020-12-22 19:01:02,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-22 19:01:02,934 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 51 [2020-12-22 19:01:02,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:01:02,935 INFO L225 Difference]: With dead ends: 61 [2020-12-22 19:01:02,935 INFO L226 Difference]: Without dead ends: 61 [2020-12-22 19:01:02,936 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=183, Invalid=939, Unknown=0, NotChecked=0, Total=1122 [2020-12-22 19:01:02,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-12-22 19:01:02,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 58. [2020-12-22 19:01:02,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-12-22 19:01:02,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 59 transitions. [2020-12-22 19:01:02,939 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 59 transitions. Word has length 51 [2020-12-22 19:01:02,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:01:02,939 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 59 transitions. [2020-12-22 19:01:02,939 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-12-22 19:01:02,940 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 59 transitions. [2020-12-22 19:01:02,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-12-22 19:01:02,941 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:01:02,941 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:01:03,155 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-22 19:01:03,156 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 19:01:03,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:01:03,157 INFO L82 PathProgramCache]: Analyzing trace with hash 1247620637, now seen corresponding path program 5 times [2020-12-22 19:01:03,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:01:03,158 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732860190] [2020-12-22 19:01:03,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:01:03,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:01:03,510 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 19 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:01:03,511 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732860190] [2020-12-22 19:01:03,511 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1882908149] [2020-12-22 19:01:03,511 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 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 19:01:03,679 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-12-22 19:01:03,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:01:03,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 46 conjunts are in the unsatisfiable core [2020-12-22 19:01:03,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:01:03,888 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2020-12-22 19:01:03,890 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:01:03,896 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:01:03,898 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-22 19:01:03,898 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:21, output treesize:17 [2020-12-22 19:01:04,075 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2020-12-22 19:01:04,076 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:01:04,078 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:01:04,079 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:01:04,079 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:15, output treesize:3 [2020-12-22 19:01:04,094 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 19 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:01:04,094 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:01:04,094 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 26 [2020-12-22 19:01:04,094 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986053713] [2020-12-22 19:01:04,096 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-12-22 19:01:04,097 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:01:04,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-12-22 19:01:04,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=589, Unknown=0, NotChecked=0, Total=650 [2020-12-22 19:01:04,098 INFO L87 Difference]: Start difference. First operand 58 states and 59 transitions. Second operand 26 states. [2020-12-22 19:01:04,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:01:04,929 INFO L93 Difference]: Finished difference Result 96 states and 97 transitions. [2020-12-22 19:01:04,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-22 19:01:04,930 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 57 [2020-12-22 19:01:04,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:01:04,930 INFO L225 Difference]: With dead ends: 96 [2020-12-22 19:01:04,931 INFO L226 Difference]: Without dead ends: 65 [2020-12-22 19:01:04,931 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=168, Invalid=1092, Unknown=0, NotChecked=0, Total=1260 [2020-12-22 19:01:04,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-12-22 19:01:04,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 62. [2020-12-22 19:01:04,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-12-22 19:01:04,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 63 transitions. [2020-12-22 19:01:04,934 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 63 transitions. Word has length 57 [2020-12-22 19:01:04,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:01:04,935 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 63 transitions. [2020-12-22 19:01:04,935 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-12-22 19:01:04,935 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 63 transitions. [2020-12-22 19:01:04,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-12-22 19:01:04,936 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:01:04,936 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:01:05,150 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:01:05,151 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 19:01:05,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:01:05,152 INFO L82 PathProgramCache]: Analyzing trace with hash 757760416, now seen corresponding path program 6 times [2020-12-22 19:01:05,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:01:05,153 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477766028] [2020-12-22 19:01:05,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:01:05,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:01:05,413 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 15 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:01:05,413 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477766028] [2020-12-22 19:01:05,413 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [438373960] [2020-12-22 19:01:05,413 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 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 19:01:05,523 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-12-22 19:01:05,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:01:05,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 38 conjunts are in the unsatisfiable core [2020-12-22 19:01:05,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:01:05,542 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2020-12-22 19:01:05,542 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:01:05,548 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:01:05,549 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:01:05,549 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2020-12-22 19:01:05,994 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 28 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:01:05,994 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:01:05,994 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 27 [2020-12-22 19:01:05,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767695636] [2020-12-22 19:01:05,995 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-12-22 19:01:05,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:01:05,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-12-22 19:01:05,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=652, Unknown=0, NotChecked=0, Total=756 [2020-12-22 19:01:05,996 INFO L87 Difference]: Start difference. First operand 62 states and 63 transitions. Second operand 28 states. [2020-12-22 19:01:06,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:01:06,660 INFO L93 Difference]: Finished difference Result 71 states and 72 transitions. [2020-12-22 19:01:06,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-22 19:01:06,661 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 61 [2020-12-22 19:01:06,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:01:06,662 INFO L225 Difference]: With dead ends: 71 [2020-12-22 19:01:06,662 INFO L226 Difference]: Without dead ends: 71 [2020-12-22 19:01:06,663 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=239, Invalid=951, Unknown=0, NotChecked=0, Total=1190 [2020-12-22 19:01:06,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-12-22 19:01:06,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 68. [2020-12-22 19:01:06,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-12-22 19:01:06,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 69 transitions. [2020-12-22 19:01:06,671 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 69 transitions. Word has length 61 [2020-12-22 19:01:06,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:01:06,672 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 69 transitions. [2020-12-22 19:01:06,672 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-12-22 19:01:06,672 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 69 transitions. [2020-12-22 19:01:06,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-22 19:01:06,673 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:01:06,674 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:01:06,887 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:01:06,888 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 19:01:06,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:01:06,888 INFO L82 PathProgramCache]: Analyzing trace with hash 586394040, now seen corresponding path program 7 times [2020-12-22 19:01:06,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:01:06,889 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314226461] [2020-12-22 19:01:06,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:01:06,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:01:07,243 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 23 proven. 130 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:01:07,244 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314226461] [2020-12-22 19:01:07,244 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1235487807] [2020-12-22 19:01:07,244 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 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 19:01:07,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:01:07,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 52 conjunts are in the unsatisfiable core [2020-12-22 19:01:07,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:01:07,621 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2020-12-22 19:01:07,622 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:01:07,628 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:01:07,629 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-22 19:01:07,629 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:21, output treesize:17 [2020-12-22 19:01:07,812 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2020-12-22 19:01:07,813 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:01:07,815 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:01:07,815 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:01:07,816 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:15, output treesize:3 [2020-12-22 19:01:07,833 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 23 proven. 130 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:01:07,833 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:01:07,833 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 29 [2020-12-22 19:01:07,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590771812] [2020-12-22 19:01:07,834 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-12-22 19:01:07,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:01:07,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-12-22 19:01:07,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=744, Unknown=0, NotChecked=0, Total=812 [2020-12-22 19:01:07,835 INFO L87 Difference]: Start difference. First operand 68 states and 69 transitions. Second operand 29 states. [2020-12-22 19:01:08,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:01:08,909 INFO L93 Difference]: Finished difference Result 112 states and 113 transitions. [2020-12-22 19:01:08,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-22 19:01:08,910 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 67 [2020-12-22 19:01:08,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:01:08,910 INFO L225 Difference]: With dead ends: 112 [2020-12-22 19:01:08,911 INFO L226 Difference]: Without dead ends: 75 [2020-12-22 19:01:08,911 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=186, Invalid=1374, Unknown=0, NotChecked=0, Total=1560 [2020-12-22 19:01:08,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-12-22 19:01:08,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 72. [2020-12-22 19:01:08,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-12-22 19:01:08,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 73 transitions. [2020-12-22 19:01:08,914 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 73 transitions. Word has length 67 [2020-12-22 19:01:08,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:01:08,915 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 73 transitions. [2020-12-22 19:01:08,915 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-12-22 19:01:08,915 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 73 transitions. [2020-12-22 19:01:08,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-12-22 19:01:08,916 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:01:08,916 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:01:09,119 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:01:09,120 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 19:01:09,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:01:09,121 INFO L82 PathProgramCache]: Analyzing trace with hash 8172923, now seen corresponding path program 8 times [2020-12-22 19:01:09,122 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:01:09,122 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673966212] [2020-12-22 19:01:09,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:01:09,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:01:09,509 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 28 proven. 146 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:01:09,509 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673966212] [2020-12-22 19:01:09,510 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1064127290] [2020-12-22 19:01:09,510 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 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 19:01:09,591 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 19:01:09,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:01:09,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 45 conjunts are in the unsatisfiable core [2020-12-22 19:01:09,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:01:09,941 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 45 proven. 129 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:01:09,941 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:01:09,942 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 26 [2020-12-22 19:01:09,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121253724] [2020-12-22 19:01:09,942 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-12-22 19:01:09,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:01:09,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-12-22 19:01:09,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=598, Unknown=0, NotChecked=0, Total=702 [2020-12-22 19:01:09,944 INFO L87 Difference]: Start difference. First operand 72 states and 73 transitions. Second operand 27 states. [2020-12-22 19:01:10,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:01:10,475 INFO L93 Difference]: Finished difference Result 81 states and 82 transitions. [2020-12-22 19:01:10,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-22 19:01:10,476 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 71 [2020-12-22 19:01:10,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:01:10,477 INFO L225 Difference]: With dead ends: 81 [2020-12-22 19:01:10,477 INFO L226 Difference]: Without dead ends: 81 [2020-12-22 19:01:10,478 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=256, Invalid=934, Unknown=0, NotChecked=0, Total=1190 [2020-12-22 19:01:10,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-12-22 19:01:10,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 78. [2020-12-22 19:01:10,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-12-22 19:01:10,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 79 transitions. [2020-12-22 19:01:10,480 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 79 transitions. Word has length 71 [2020-12-22 19:01:10,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:01:10,480 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 79 transitions. [2020-12-22 19:01:10,481 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-12-22 19:01:10,481 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 79 transitions. [2020-12-22 19:01:10,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-12-22 19:01:10,481 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:01:10,482 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:01:10,693 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-12-22 19:01:10,694 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 19:01:10,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:01:10,695 INFO L82 PathProgramCache]: Analyzing trace with hash -813150893, now seen corresponding path program 9 times [2020-12-22 19:01:10,695 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:01:10,695 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682202399] [2020-12-22 19:01:10,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:01:10,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:01:11,183 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 27 proven. 186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:01:11,183 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682202399] [2020-12-22 19:01:11,183 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [18747872] [2020-12-22 19:01:11,183 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 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 19:01:11,402 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-12-22 19:01:11,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:01:11,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 58 conjunts are in the unsatisfiable core [2020-12-22 19:01:11,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:01:11,737 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2020-12-22 19:01:11,740 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:01:11,749 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:01:11,750 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-22 19:01:11,750 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:21, output treesize:17 [2020-12-22 19:01:11,958 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2020-12-22 19:01:11,960 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:01:11,961 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:01:11,962 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:01:11,962 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:15, output treesize:3 [2020-12-22 19:01:11,979 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 27 proven. 186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:01:11,980 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:01:11,980 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 32 [2020-12-22 19:01:11,980 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003177671] [2020-12-22 19:01:11,981 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-12-22 19:01:11,981 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:01:11,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-12-22 19:01:11,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=917, Unknown=0, NotChecked=0, Total=992 [2020-12-22 19:01:11,982 INFO L87 Difference]: Start difference. First operand 78 states and 79 transitions. Second operand 32 states. [2020-12-22 19:01:13,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:01:13,228 INFO L93 Difference]: Finished difference Result 128 states and 129 transitions. [2020-12-22 19:01:13,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-22 19:01:13,229 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 77 [2020-12-22 19:01:13,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:01:13,229 INFO L225 Difference]: With dead ends: 128 [2020-12-22 19:01:13,230 INFO L226 Difference]: Without dead ends: 85 [2020-12-22 19:01:13,231 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 66 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=204, Invalid=1688, Unknown=0, NotChecked=0, Total=1892 [2020-12-22 19:01:13,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-12-22 19:01:13,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 82. [2020-12-22 19:01:13,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-12-22 19:01:13,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 83 transitions. [2020-12-22 19:01:13,234 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 83 transitions. Word has length 77 [2020-12-22 19:01:13,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:01:13,234 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 83 transitions. [2020-12-22 19:01:13,234 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-12-22 19:01:13,234 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 83 transitions. [2020-12-22 19:01:13,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-22 19:01:13,235 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:01:13,235 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:01:13,450 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:01:13,451 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 19:01:13,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:01:13,451 INFO L82 PathProgramCache]: Analyzing trace with hash 1404289366, now seen corresponding path program 10 times [2020-12-22 19:01:13,452 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:01:13,452 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874561744] [2020-12-22 19:01:13,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:01:13,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:01:13,837 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 45 proven. 193 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:01:13,837 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874561744] [2020-12-22 19:01:13,838 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [332043116] [2020-12-22 19:01:13,838 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 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 19:01:13,917 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 19:01:13,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:01:13,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 59 conjunts are in the unsatisfiable core [2020-12-22 19:01:13,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:01:13,934 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2020-12-22 19:01:13,935 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:01:13,940 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:01:13,941 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:01:13,941 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2020-12-22 19:01:14,072 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2020-12-22 19:01:14,074 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:01:14,081 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:01:14,082 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:01:14,082 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:23 [2020-12-22 19:01:14,610 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:01:14,611 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2020-12-22 19:01:14,613 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2020-12-22 19:01:14,626 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:01:14,627 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:01:14,627 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:24 [2020-12-22 19:01:14,699 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 19:01:14,702 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 19:01:14,941 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 72 proven. 166 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:01:14,941 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:01:14,941 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 22] total 33 [2020-12-22 19:01:14,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057299035] [2020-12-22 19:01:14,942 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-12-22 19:01:14,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:01:14,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-12-22 19:01:14,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=1028, Unknown=0, NotChecked=0, Total=1122 [2020-12-22 19:01:14,943 INFO L87 Difference]: Start difference. First operand 82 states and 83 transitions. Second operand 34 states. [2020-12-22 19:01:16,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:01:16,662 INFO L93 Difference]: Finished difference Result 91 states and 92 transitions. [2020-12-22 19:01:16,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-22 19:01:16,663 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 81 [2020-12-22 19:01:16,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:01:16,664 INFO L225 Difference]: With dead ends: 91 [2020-12-22 19:01:16,664 INFO L226 Difference]: Without dead ends: 91 [2020-12-22 19:01:16,665 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=300, Invalid=1770, Unknown=0, NotChecked=0, Total=2070 [2020-12-22 19:01:16,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-12-22 19:01:16,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 88. [2020-12-22 19:01:16,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-12-22 19:01:16,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 89 transitions. [2020-12-22 19:01:16,667 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 89 transitions. Word has length 81 [2020-12-22 19:01:16,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:01:16,667 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 89 transitions. [2020-12-22 19:01:16,667 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-12-22 19:01:16,667 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 89 transitions. [2020-12-22 19:01:16,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-12-22 19:01:16,668 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:01:16,668 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:01:16,869 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-12-22 19:01:16,869 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 19:01:16,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:01:16,870 INFO L82 PathProgramCache]: Analyzing trace with hash -1023424274, now seen corresponding path program 11 times [2020-12-22 19:01:16,870 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:01:16,871 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329653527] [2020-12-22 19:01:16,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:01:16,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:01:17,493 INFO L134 CoverageAnalysis]: Checked inductivity of 283 backedges. 31 proven. 252 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:01:17,493 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329653527] [2020-12-22 19:01:17,493 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1298120715] [2020-12-22 19:01:17,494 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 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 19:01:17,780 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-12-22 19:01:17,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:01:17,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 62 conjunts are in the unsatisfiable core [2020-12-22 19:01:17,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:01:18,189 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2020-12-22 19:01:18,190 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:01:18,197 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:01:18,199 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-22 19:01:18,199 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:21, output treesize:17 [2020-12-22 19:01:18,438 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2020-12-22 19:01:18,440 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:01:18,442 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:01:18,442 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:01:18,442 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:15, output treesize:3 [2020-12-22 19:01:18,462 INFO L134 CoverageAnalysis]: Checked inductivity of 283 backedges. 31 proven. 252 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:01:18,462 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:01:18,463 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 35 [2020-12-22 19:01:18,463 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926798031] [2020-12-22 19:01:18,463 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-12-22 19:01:18,463 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:01:18,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-12-22 19:01:18,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=1108, Unknown=0, NotChecked=0, Total=1190 [2020-12-22 19:01:18,464 INFO L87 Difference]: Start difference. First operand 88 states and 89 transitions. Second operand 35 states. [2020-12-22 19:01:19,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:01:19,968 INFO L93 Difference]: Finished difference Result 144 states and 145 transitions. [2020-12-22 19:01:19,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-12-22 19:01:19,969 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 87 [2020-12-22 19:01:19,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:01:19,970 INFO L225 Difference]: With dead ends: 144 [2020-12-22 19:01:19,970 INFO L226 Difference]: Without dead ends: 95 [2020-12-22 19:01:19,971 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=222, Invalid=2034, Unknown=0, NotChecked=0, Total=2256 [2020-12-22 19:01:19,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-12-22 19:01:19,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 92. [2020-12-22 19:01:19,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-12-22 19:01:19,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 93 transitions. [2020-12-22 19:01:19,975 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 93 transitions. Word has length 87 [2020-12-22 19:01:19,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:01:19,975 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 93 transitions. [2020-12-22 19:01:19,975 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-12-22 19:01:19,975 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 93 transitions. [2020-12-22 19:01:19,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-12-22 19:01:19,976 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 19:01:19,976 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 19:01:20,181 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 19:01:20,181 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-22 19:01:20,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 19:01:20,182 INFO L82 PathProgramCache]: Analyzing trace with hash -1390914255, now seen corresponding path program 12 times [2020-12-22 19:01:20,182 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 19:01:20,182 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115202602] [2020-12-22 19:01:20,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 19:01:20,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 19:01:20,627 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 66 proven. 246 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 19:01:20,628 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115202602] [2020-12-22 19:01:20,628 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [685418782] [2020-12-22 19:01:20,628 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 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 19:01:21,023 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-12-22 19:01:21,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 19:01:21,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 38 conjunts are in the unsatisfiable core [2020-12-22 19:01:21,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 19:01:21,037 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2020-12-22 19:01:21,038 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:01:21,043 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:01:21,043 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:01:21,044 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2020-12-22 19:01:21,129 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2020-12-22 19:01:21,130 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 19:01:21,136 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:01:21,138 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-22 19:01:21,138 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:19 [2020-12-22 19:01:21,433 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:01:21,433 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 20 [2020-12-22 19:01:21,435 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2020-12-22 19:01:21,450 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 19:01:21,452 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 19:01:21,454 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 19:01:21,454 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:29 [2020-12-22 19:01:21,505 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 19:01:21,505 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 19:01:21,682 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 267 trivial. 0 not checked. [2020-12-22 19:01:21,683 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 19:01:21,683 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 8] total 27 [2020-12-22 19:01:21,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312427869] [2020-12-22 19:01:21,684 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-12-22 19:01:21,684 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 19:01:21,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-12-22 19:01:21,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=638, Unknown=0, NotChecked=0, Total=756 [2020-12-22 19:01:21,686 INFO L87 Difference]: Start difference. First operand 92 states and 93 transitions. Second operand 28 states. [2020-12-22 19:01:23,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 19:01:23,252 INFO L93 Difference]: Finished difference Result 94 states and 95 transitions. [2020-12-22 19:01:23,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-22 19:01:23,253 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 91 [2020-12-22 19:01:23,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 19:01:23,254 INFO L225 Difference]: With dead ends: 94 [2020-12-22 19:01:23,254 INFO L226 Difference]: Without dead ends: 0 [2020-12-22 19:01:23,255 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=397, Invalid=1325, Unknown=0, NotChecked=0, Total=1722 [2020-12-22 19:01:23,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-12-22 19:01:23,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-12-22 19:01:23,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-12-22 19:01:23,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-12-22 19:01:23,256 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 91 [2020-12-22 19:01:23,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 19:01:23,257 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-12-22 19:01:23,257 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-12-22 19:01:23,257 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-12-22 19:01:23,257 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-12-22 19:01:23,461 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-12-22 19:01:23,467 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.12 07:01:23 BoogieIcfgContainer [2020-12-22 19:01:23,468 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-22 19:01:23,468 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-22 19:01:23,468 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-22 19:01:23,468 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-22 19:01:23,469 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:00:48" (3/4) ... [2020-12-22 19:01:23,472 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-12-22 19:01:23,483 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 9 nodes and edges [2020-12-22 19:01:23,483 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2020-12-22 19:01:23,483 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2020-12-22 19:01:23,526 INFO L141 WitnessManager]: Wrote witness to /storage/repos/svcomp/c/array-memsafety/openbsd_cstrnlen-alloca-1.i-witness.graphml [2020-12-22 19:01:23,526 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-22 19:01:23,527 INFO L168 Benchmark]: Toolchain (without parser) took 36025.74 ms. Allocated memory was 151.0 MB in the beginning and 314.6 MB in the end (delta: 163.6 MB). Free memory was 126.2 MB in the beginning and 251.9 MB in the end (delta: -125.7 MB). Peak memory consumption was 38.9 MB. Max. memory is 8.0 GB. [2020-12-22 19:01:23,527 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 151.0 MB. Free memory is still 128.2 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-12-22 19:01:23,528 INFO L168 Benchmark]: CACSL2BoogieTranslator took 736.43 ms. Allocated memory is still 151.0 MB. Free memory was 126.0 MB in the beginning and 105.6 MB in the end (delta: 20.4 MB). Peak memory consumption was 21.0 MB. Max. memory is 8.0 GB. [2020-12-22 19:01:23,528 INFO L168 Benchmark]: Boogie Procedure Inliner took 78.07 ms. Allocated memory is still 151.0 MB. Free memory was 105.6 MB in the beginning and 103.8 MB in the end (delta: 1.8 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-22 19:01:23,528 INFO L168 Benchmark]: Boogie Preprocessor took 43.86 ms. Allocated memory is still 151.0 MB. Free memory was 103.7 MB in the beginning and 102.4 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-12-22 19:01:23,529 INFO L168 Benchmark]: RCFGBuilder took 590.43 ms. Allocated memory is still 151.0 MB. Free memory was 102.4 MB in the beginning and 122.3 MB in the end (delta: -19.8 MB). Peak memory consumption was 9.6 MB. Max. memory is 8.0 GB. [2020-12-22 19:01:23,529 INFO L168 Benchmark]: TraceAbstraction took 34506.40 ms. Allocated memory was 151.0 MB in the beginning and 314.6 MB in the end (delta: 163.6 MB). Free memory was 121.7 MB in the beginning and 254.7 MB in the end (delta: -133.0 MB). Peak memory consumption was 30.3 MB. Max. memory is 8.0 GB. [2020-12-22 19:01:23,529 INFO L168 Benchmark]: Witness Printer took 57.86 ms. Allocated memory is still 314.6 MB. Free memory was 254.7 MB in the beginning and 251.9 MB in the end (delta: 2.9 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. [2020-12-22 19:01:23,532 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 151.0 MB. Free memory is still 128.2 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 736.43 ms. Allocated memory is still 151.0 MB. Free memory was 126.0 MB in the beginning and 105.6 MB in the end (delta: 20.4 MB). Peak memory consumption was 21.0 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 78.07 ms. Allocated memory is still 151.0 MB. Free memory was 105.6 MB in the beginning and 103.8 MB in the end (delta: 1.8 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 43.86 ms. Allocated memory is still 151.0 MB. Free memory was 103.7 MB in the beginning and 102.4 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 590.43 ms. Allocated memory is still 151.0 MB. Free memory was 102.4 MB in the beginning and 122.3 MB in the end (delta: -19.8 MB). Peak memory consumption was 9.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 34506.40 ms. Allocated memory was 151.0 MB in the beginning and 314.6 MB in the end (delta: 163.6 MB). Free memory was 121.7 MB in the beginning and 254.7 MB in the end (delta: -133.0 MB). Peak memory consumption was 30.3 MB. Max. memory is 8.0 GB. * Witness Printer took 57.86 ms. Allocated memory is still 314.6 MB. Free memory was 254.7 MB in the beginning and 251.9 MB in the end (delta: 2.9 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 534]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 534]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 521]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 517]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 517]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 537]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 537]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - AllSpecificationsHoldResult: All specifications hold 7 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 29 locations, 7 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 34.4s, OverallIterations: 26, TraceHistogramMax: 9, AutomataDifference: 14.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 672 SDtfs, 3696 SDslu, 6206 SDs, 0 SdLazy, 7732 SolverSat, 568 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 5.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1265 GetRequests, 712 SyntacticMatches, 10 SemanticMatches, 543 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2111 ImplicationChecksByTransitivity, 15.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=92occurred 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: 0.1s AutomataMinimizationTime, 26 MinimizatonAttempts, 142 StatesRemovedByMinimization, 20 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 2.0s SatisfiabilityAnalysisTime, 12.2s InterpolantComputationTime, 1796 NumberOfCodeBlocks, 1770 NumberOfCodeBlocksAsserted, 83 NumberOfCheckSat, 1753 ConstructedInterpolants, 114 QuantifiedInterpolants, 1036681 SizeOfPredicates, 188 NumberOfNonLiveVariables, 2655 ConjunctsInSsa, 641 ConjunctsInUnsatCore, 43 InterpolantComputations, 11 PerfectInterpolantSequences, 860/3622 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...