/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/ssh-simplified/s3_srvr_13.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-72570d3 [2020-08-22 18:59:42,055 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 18:59:42,058 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 18:59:42,083 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-22 18:59:42,084 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-22 18:59:42,085 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-22 18:59:42,086 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-22 18:59:42,088 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-22 18:59:42,090 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-22 18:59:42,090 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-22 18:59:42,091 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-22 18:59:42,092 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-22 18:59:42,093 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 18:59:42,094 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 18:59:42,095 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 18:59:42,096 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 18:59:42,097 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 18:59:42,098 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 18:59:42,099 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 18:59:42,101 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 18:59:42,103 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 18:59:42,104 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 18:59:42,105 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 18:59:42,106 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 18:59:42,108 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-22 18:59:42,115 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 18:59:42,116 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 18:59:42,117 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 18:59:42,118 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-08-22 18:59:42,127 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 18:59:42,128 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 18:59:42,129 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 18:59:42,129 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 18:59:42,129 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 18:59:42,130 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 18:59:42,130 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 18:59:42,130 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 18:59:42,130 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 18:59:42,130 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 18:59:42,131 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 18:59:42,131 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 18:59:42,131 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 18:59:42,131 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 18:59:42,131 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 18:59:42,131 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-08-22 18:59:42,132 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 18:59:42,132 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 18:59:42,132 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 18:59:42,132 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 18:59:42,132 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-08-22 18:59:42,133 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 18:59:42,133 INFO L138 SettingsManager]: * Use separate solver for trace checks=false [2020-08-22 18:59:42,440 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 18:59:42,457 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 18:59:42,462 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 18:59:42,463 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 18:59:42,464 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 18:59:42,465 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ssh-simplified/s3_srvr_13.cil.c [2020-08-22 18:59:42,530 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/14a47e855/6b8813c127b840838dddda05cf65f105/FLAG9872c7963 [2020-08-22 18:59:43,066 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 18:59:43,070 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ssh-simplified/s3_srvr_13.cil.c [2020-08-22 18:59:43,083 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/14a47e855/6b8813c127b840838dddda05cf65f105/FLAG9872c7963 [2020-08-22 18:59:43,395 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/14a47e855/6b8813c127b840838dddda05cf65f105 [2020-08-22 18:59:43,407 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 18:59:43,409 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 18:59:43,410 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 18:59:43,410 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 18:59:43,414 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 18:59:43,415 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 06:59:43" (1/1) ... [2020-08-22 18:59:43,418 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@21e9d6c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:59:43, skipping insertion in model container [2020-08-22 18:59:43,418 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 06:59:43" (1/1) ... [2020-08-22 18:59:43,427 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 18:59:43,467 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 18:59:43,714 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 18:59:43,719 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 18:59:43,930 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 18:59:43,955 INFO L208 MainTranslator]: Completed translation [2020-08-22 18:59:43,955 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:59:43 WrapperNode [2020-08-22 18:59:43,955 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 18:59:43,956 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 18:59:43,956 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 18:59:43,956 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 18:59:43,967 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:59:43" (1/1) ... [2020-08-22 18:59:43,967 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:59:43" (1/1) ... [2020-08-22 18:59:43,978 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:59:43" (1/1) ... [2020-08-22 18:59:43,978 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:59:43" (1/1) ... [2020-08-22 18:59:43,992 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:59:43" (1/1) ... [2020-08-22 18:59:44,008 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:59:43" (1/1) ... [2020-08-22 18:59:44,012 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:59:43" (1/1) ... [2020-08-22 18:59:44,017 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 18:59:44,018 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 18:59:44,018 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 18:59:44,018 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 18:59:44,019 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:59:43" (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 [2020-08-22 18:59:44,084 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 18:59:44,085 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 18:59:44,085 INFO L138 BoogieDeclarations]: Found implementation of procedure ssl3_accept [2020-08-22 18:59:44,085 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 18:59:44,085 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 18:59:44,085 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-08-22 18:59:44,085 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-22 18:59:44,085 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_long [2020-08-22 18:59:44,085 INFO L130 BoogieDeclarations]: Found specification of procedure ssl3_accept [2020-08-22 18:59:44,085 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 18:59:44,086 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 18:59:44,086 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 18:59:44,305 WARN L779 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2020-08-22 18:59:44,966 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##90: assume false; [2020-08-22 18:59:44,967 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##91: assume !false; [2020-08-22 18:59:44,986 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 18:59:44,986 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-22 18:59:44,995 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 06:59:44 BoogieIcfgContainer [2020-08-22 18:59:44,995 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 18:59:44,997 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 18:59:44,997 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 18:59:45,001 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 18:59:45,001 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 06:59:43" (1/3) ... [2020-08-22 18:59:45,002 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23b77d2b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 06:59:45, skipping insertion in model container [2020-08-22 18:59:45,002 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:59:43" (2/3) ... [2020-08-22 18:59:45,003 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23b77d2b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 06:59:45, skipping insertion in model container [2020-08-22 18:59:45,003 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 06:59:44" (3/3) ... [2020-08-22 18:59:45,005 INFO L109 eAbstractionObserver]: Analyzing ICFG s3_srvr_13.cil.c [2020-08-22 18:59:45,019 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 18:59:45,034 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 18:59:45,052 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 18:59:45,082 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 18:59:45,082 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 18:59:45,083 INFO L377 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-08-22 18:59:45,083 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 18:59:45,083 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 18:59:45,083 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 18:59:45,084 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 18:59:45,084 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 18:59:45,121 INFO L276 IsEmpty]: Start isEmpty. Operand 440 states. [2020-08-22 18:59:45,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2020-08-22 18:59:45,154 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 18:59:45,156 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 18:59:45,156 INFO L427 AbstractCegarLoop]: === Iteration 1 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 18:59:45,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 18:59:45,161 INFO L82 PathProgramCache]: Analyzing trace with hash 1103530067, now seen corresponding path program 1 times [2020-08-22 18:59:45,170 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 18:59:45,171 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1385184395] [2020-08-22 18:59:45,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 18:59:45,246 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 18:59:45,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:59:45,703 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 18:59:45,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:59:45,775 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 18:59:45,777 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1385184395] [2020-08-22 18:59:45,780 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 18:59:45,780 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-22 18:59:45,781 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701452292] [2020-08-22 18:59:45,786 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-22 18:59:45,787 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 18:59:45,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-22 18:59:45,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-22 18:59:45,805 INFO L87 Difference]: Start difference. First operand 440 states. Second operand 6 states. [2020-08-22 18:59:46,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 18:59:46,465 INFO L93 Difference]: Finished difference Result 832 states and 1103 transitions. [2020-08-22 18:59:46,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-22 18:59:46,467 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 160 [2020-08-22 18:59:46,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 18:59:46,494 INFO L225 Difference]: With dead ends: 832 [2020-08-22 18:59:46,495 INFO L226 Difference]: Without dead ends: 472 [2020-08-22 18:59:46,502 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-08-22 18:59:46,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2020-08-22 18:59:46,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 459. [2020-08-22 18:59:46,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 459 states. [2020-08-22 18:59:46,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 459 states to 459 states and 549 transitions. [2020-08-22 18:59:46,610 INFO L78 Accepts]: Start accepts. Automaton has 459 states and 549 transitions. Word has length 160 [2020-08-22 18:59:46,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 18:59:46,611 INFO L479 AbstractCegarLoop]: Abstraction has 459 states and 549 transitions. [2020-08-22 18:59:46,612 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-22 18:59:46,612 INFO L276 IsEmpty]: Start isEmpty. Operand 459 states and 549 transitions. [2020-08-22 18:59:46,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2020-08-22 18:59:46,616 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 18:59:46,616 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 18:59:46,617 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 18:59:46,617 INFO L427 AbstractCegarLoop]: === Iteration 2 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 18:59:46,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 18:59:46,618 INFO L82 PathProgramCache]: Analyzing trace with hash -466072829, now seen corresponding path program 1 times [2020-08-22 18:59:46,618 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 18:59:46,619 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1990629409] [2020-08-22 18:59:46,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 18:59:46,622 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 18:59:46,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:59:46,731 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 18:59:46,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:59:46,759 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 18:59:46,759 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1990629409] [2020-08-22 18:59:46,760 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 18:59:46,760 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 18:59:46,760 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196581800] [2020-08-22 18:59:46,762 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 18:59:46,762 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 18:59:46,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 18:59:46,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 18:59:46,763 INFO L87 Difference]: Start difference. First operand 459 states and 549 transitions. Second operand 3 states. [2020-08-22 18:59:46,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 18:59:46,897 INFO L93 Difference]: Finished difference Result 1085 states and 1347 transitions. [2020-08-22 18:59:46,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 18:59:46,897 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 169 [2020-08-22 18:59:46,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 18:59:46,903 INFO L225 Difference]: With dead ends: 1085 [2020-08-22 18:59:46,903 INFO L226 Difference]: Without dead ends: 766 [2020-08-22 18:59:46,907 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 18:59:46,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 766 states. [2020-08-22 18:59:46,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 766 to 764. [2020-08-22 18:59:46,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 764 states. [2020-08-22 18:59:46,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 764 states to 764 states and 931 transitions. [2020-08-22 18:59:46,968 INFO L78 Accepts]: Start accepts. Automaton has 764 states and 931 transitions. Word has length 169 [2020-08-22 18:59:46,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 18:59:46,969 INFO L479 AbstractCegarLoop]: Abstraction has 764 states and 931 transitions. [2020-08-22 18:59:46,969 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 18:59:46,969 INFO L276 IsEmpty]: Start isEmpty. Operand 764 states and 931 transitions. [2020-08-22 18:59:46,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2020-08-22 18:59:46,972 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 18:59:46,973 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 18:59:46,973 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 18:59:46,973 INFO L427 AbstractCegarLoop]: === Iteration 3 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 18:59:46,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 18:59:46,974 INFO L82 PathProgramCache]: Analyzing trace with hash -1669990880, now seen corresponding path program 1 times [2020-08-22 18:59:46,974 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 18:59:46,975 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1267541619] [2020-08-22 18:59:46,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 18:59:46,977 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 18:59:47,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:59:47,071 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 18:59:47,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:59:47,115 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 18:59:47,116 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1267541619] [2020-08-22 18:59:47,116 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 18:59:47,116 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 18:59:47,116 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525752995] [2020-08-22 18:59:47,117 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 18:59:47,118 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 18:59:47,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 18:59:47,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 18:59:47,119 INFO L87 Difference]: Start difference. First operand 764 states and 931 transitions. Second operand 3 states. [2020-08-22 18:59:47,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 18:59:47,436 INFO L93 Difference]: Finished difference Result 1539 states and 1955 transitions. [2020-08-22 18:59:47,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 18:59:47,437 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 170 [2020-08-22 18:59:47,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 18:59:47,443 INFO L225 Difference]: With dead ends: 1539 [2020-08-22 18:59:47,443 INFO L226 Difference]: Without dead ends: 891 [2020-08-22 18:59:47,445 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 18:59:47,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 891 states. [2020-08-22 18:59:47,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 891 to 822. [2020-08-22 18:59:47,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 822 states. [2020-08-22 18:59:47,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 822 states to 822 states and 1019 transitions. [2020-08-22 18:59:47,511 INFO L78 Accepts]: Start accepts. Automaton has 822 states and 1019 transitions. Word has length 170 [2020-08-22 18:59:47,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 18:59:47,512 INFO L479 AbstractCegarLoop]: Abstraction has 822 states and 1019 transitions. [2020-08-22 18:59:47,512 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 18:59:47,512 INFO L276 IsEmpty]: Start isEmpty. Operand 822 states and 1019 transitions. [2020-08-22 18:59:47,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2020-08-22 18:59:47,515 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 18:59:47,515 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 18:59:47,515 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-22 18:59:47,516 INFO L427 AbstractCegarLoop]: === Iteration 4 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 18:59:47,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 18:59:47,516 INFO L82 PathProgramCache]: Analyzing trace with hash -1230208187, now seen corresponding path program 1 times [2020-08-22 18:59:47,516 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 18:59:47,517 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [368886511] [2020-08-22 18:59:47,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 18:59:47,519 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 18:59:47,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:59:47,661 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 18:59:47,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:59:47,748 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 18:59:47,749 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [368886511] [2020-08-22 18:59:47,749 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 18:59:47,749 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-22 18:59:47,750 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037640934] [2020-08-22 18:59:47,751 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-22 18:59:47,751 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 18:59:47,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-22 18:59:47,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-22 18:59:47,752 INFO L87 Difference]: Start difference. First operand 822 states and 1019 transitions. Second operand 6 states. [2020-08-22 18:59:48,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 18:59:48,215 INFO L93 Difference]: Finished difference Result 1293 states and 1643 transitions. [2020-08-22 18:59:48,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-22 18:59:48,216 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 175 [2020-08-22 18:59:48,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 18:59:48,220 INFO L225 Difference]: With dead ends: 1293 [2020-08-22 18:59:48,220 INFO L226 Difference]: Without dead ends: 585 [2020-08-22 18:59:48,224 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-08-22 18:59:48,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 585 states. [2020-08-22 18:59:48,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 585 to 569. [2020-08-22 18:59:48,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 569 states. [2020-08-22 18:59:48,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 569 states to 569 states and 703 transitions. [2020-08-22 18:59:48,286 INFO L78 Accepts]: Start accepts. Automaton has 569 states and 703 transitions. Word has length 175 [2020-08-22 18:59:48,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 18:59:48,287 INFO L479 AbstractCegarLoop]: Abstraction has 569 states and 703 transitions. [2020-08-22 18:59:48,287 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-22 18:59:48,287 INFO L276 IsEmpty]: Start isEmpty. Operand 569 states and 703 transitions. [2020-08-22 18:59:48,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2020-08-22 18:59:48,290 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 18:59:48,291 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 18:59:48,291 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-22 18:59:48,291 INFO L427 AbstractCegarLoop]: === Iteration 5 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 18:59:48,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 18:59:48,292 INFO L82 PathProgramCache]: Analyzing trace with hash -312164926, now seen corresponding path program 1 times [2020-08-22 18:59:48,292 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 18:59:48,292 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1400210064] [2020-08-22 18:59:48,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 18:59:48,320 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 18:59:48,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:59:48,402 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 18:59:48,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:59:48,457 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 18:59:48,458 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1400210064] [2020-08-22 18:59:48,459 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 18:59:48,459 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 18:59:48,460 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589684376] [2020-08-22 18:59:48,461 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 18:59:48,461 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 18:59:48,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 18:59:48,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 18:59:48,462 INFO L87 Difference]: Start difference. First operand 569 states and 703 transitions. Second operand 3 states. [2020-08-22 18:59:48,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 18:59:48,715 INFO L93 Difference]: Finished difference Result 1382 states and 1775 transitions. [2020-08-22 18:59:48,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 18:59:48,715 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 197 [2020-08-22 18:59:48,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 18:59:48,724 INFO L225 Difference]: With dead ends: 1382 [2020-08-22 18:59:48,724 INFO L226 Difference]: Without dead ends: 969 [2020-08-22 18:59:48,726 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 18:59:48,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 969 states. [2020-08-22 18:59:48,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 969 to 967. [2020-08-22 18:59:48,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 967 states. [2020-08-22 18:59:48,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 967 states to 967 states and 1221 transitions. [2020-08-22 18:59:48,822 INFO L78 Accepts]: Start accepts. Automaton has 967 states and 1221 transitions. Word has length 197 [2020-08-22 18:59:48,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 18:59:48,822 INFO L479 AbstractCegarLoop]: Abstraction has 967 states and 1221 transitions. [2020-08-22 18:59:48,822 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 18:59:48,823 INFO L276 IsEmpty]: Start isEmpty. Operand 967 states and 1221 transitions. [2020-08-22 18:59:48,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2020-08-22 18:59:48,826 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 18:59:48,826 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 18:59:48,826 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-22 18:59:48,826 INFO L427 AbstractCegarLoop]: === Iteration 6 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 18:59:48,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 18:59:48,827 INFO L82 PathProgramCache]: Analyzing trace with hash -1190618208, now seen corresponding path program 1 times [2020-08-22 18:59:48,827 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 18:59:48,828 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [613774096] [2020-08-22 18:59:48,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 18:59:48,839 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 18:59:48,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:59:48,909 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 18:59:48,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:59:48,943 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 18:59:48,944 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [613774096] [2020-08-22 18:59:48,945 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 18:59:48,945 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 18:59:48,946 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936247172] [2020-08-22 18:59:48,947 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 18:59:48,947 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 18:59:48,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 18:59:48,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 18:59:48,948 INFO L87 Difference]: Start difference. First operand 967 states and 1221 transitions. Second operand 3 states. [2020-08-22 18:59:49,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 18:59:49,308 INFO L93 Difference]: Finished difference Result 1889 states and 2467 transitions. [2020-08-22 18:59:49,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 18:59:49,308 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 198 [2020-08-22 18:59:49,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 18:59:49,317 INFO L225 Difference]: With dead ends: 1889 [2020-08-22 18:59:49,321 INFO L226 Difference]: Without dead ends: 1078 [2020-08-22 18:59:49,324 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 18:59:49,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1078 states. [2020-08-22 18:59:49,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1078 to 1062. [2020-08-22 18:59:49,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1062 states. [2020-08-22 18:59:49,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1062 states to 1062 states and 1334 transitions. [2020-08-22 18:59:49,429 INFO L78 Accepts]: Start accepts. Automaton has 1062 states and 1334 transitions. Word has length 198 [2020-08-22 18:59:49,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 18:59:49,430 INFO L479 AbstractCegarLoop]: Abstraction has 1062 states and 1334 transitions. [2020-08-22 18:59:49,430 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 18:59:49,430 INFO L276 IsEmpty]: Start isEmpty. Operand 1062 states and 1334 transitions. [2020-08-22 18:59:49,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2020-08-22 18:59:49,433 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 18:59:49,434 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 18:59:49,434 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-22 18:59:49,434 INFO L427 AbstractCegarLoop]: === Iteration 7 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 18:59:49,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 18:59:49,435 INFO L82 PathProgramCache]: Analyzing trace with hash 1815361344, now seen corresponding path program 1 times [2020-08-22 18:59:49,435 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 18:59:49,436 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2110842054] [2020-08-22 18:59:49,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 18:59:49,449 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 18:59:49,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:59:49,510 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 18:59:49,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:59:49,533 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 18:59:49,534 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2110842054] [2020-08-22 18:59:49,534 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 18:59:49,534 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 18:59:49,535 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040200136] [2020-08-22 18:59:49,535 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 18:59:49,536 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 18:59:49,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 18:59:49,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 18:59:49,537 INFO L87 Difference]: Start difference. First operand 1062 states and 1334 transitions. Second operand 3 states. [2020-08-22 18:59:49,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 18:59:49,988 INFO L93 Difference]: Finished difference Result 2052 states and 2632 transitions. [2020-08-22 18:59:49,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 18:59:49,989 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 198 [2020-08-22 18:59:49,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 18:59:49,998 INFO L225 Difference]: With dead ends: 2052 [2020-08-22 18:59:49,998 INFO L226 Difference]: Without dead ends: 1126 [2020-08-22 18:59:50,001 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 18:59:50,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1126 states. [2020-08-22 18:59:50,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1126 to 1093. [2020-08-22 18:59:50,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1093 states. [2020-08-22 18:59:50,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1093 states to 1093 states and 1379 transitions. [2020-08-22 18:59:50,162 INFO L78 Accepts]: Start accepts. Automaton has 1093 states and 1379 transitions. Word has length 198 [2020-08-22 18:59:50,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 18:59:50,163 INFO L479 AbstractCegarLoop]: Abstraction has 1093 states and 1379 transitions. [2020-08-22 18:59:50,163 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 18:59:50,164 INFO L276 IsEmpty]: Start isEmpty. Operand 1093 states and 1379 transitions. [2020-08-22 18:59:50,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2020-08-22 18:59:50,170 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 18:59:50,170 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 18:59:50,171 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-22 18:59:50,171 INFO L427 AbstractCegarLoop]: === Iteration 8 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 18:59:50,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 18:59:50,172 INFO L82 PathProgramCache]: Analyzing trace with hash 1252882748, now seen corresponding path program 1 times [2020-08-22 18:59:50,173 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 18:59:50,174 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [609634332] [2020-08-22 18:59:50,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 18:59:50,199 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 18:59:50,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:59:50,316 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 18:59:50,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:59:50,362 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 18:59:50,363 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [609634332] [2020-08-22 18:59:50,364 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 18:59:50,364 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 18:59:50,365 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815294209] [2020-08-22 18:59:50,365 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 18:59:50,366 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 18:59:50,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 18:59:50,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 18:59:50,367 INFO L87 Difference]: Start difference. First operand 1093 states and 1379 transitions. Second operand 3 states. [2020-08-22 18:59:50,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 18:59:50,583 INFO L93 Difference]: Finished difference Result 2050 states and 2622 transitions. [2020-08-22 18:59:50,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 18:59:50,584 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 207 [2020-08-22 18:59:50,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 18:59:50,591 INFO L225 Difference]: With dead ends: 2050 [2020-08-22 18:59:50,591 INFO L226 Difference]: Without dead ends: 1113 [2020-08-22 18:59:50,595 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 18:59:50,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1113 states. [2020-08-22 18:59:50,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1113 to 1111. [2020-08-22 18:59:50,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1111 states. [2020-08-22 18:59:50,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1111 states to 1111 states and 1399 transitions. [2020-08-22 18:59:50,714 INFO L78 Accepts]: Start accepts. Automaton has 1111 states and 1399 transitions. Word has length 207 [2020-08-22 18:59:50,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 18:59:50,715 INFO L479 AbstractCegarLoop]: Abstraction has 1111 states and 1399 transitions. [2020-08-22 18:59:50,715 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 18:59:50,715 INFO L276 IsEmpty]: Start isEmpty. Operand 1111 states and 1399 transitions. [2020-08-22 18:59:50,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2020-08-22 18:59:50,719 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 18:59:50,719 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 18:59:50,719 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-22 18:59:50,719 INFO L427 AbstractCegarLoop]: === Iteration 9 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 18:59:50,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 18:59:50,720 INFO L82 PathProgramCache]: Analyzing trace with hash -50860722, now seen corresponding path program 1 times [2020-08-22 18:59:50,720 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 18:59:50,721 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1194569183] [2020-08-22 18:59:50,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 18:59:50,731 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 18:59:50,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:59:50,817 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 18:59:50,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:59:50,857 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 18:59:50,857 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1194569183] [2020-08-22 18:59:50,858 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 18:59:50,858 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 18:59:50,863 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179654339] [2020-08-22 18:59:50,864 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 18:59:50,865 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 18:59:50,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 18:59:50,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 18:59:50,867 INFO L87 Difference]: Start difference. First operand 1111 states and 1399 transitions. Second operand 4 states. [2020-08-22 18:59:51,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 18:59:51,248 INFO L93 Difference]: Finished difference Result 2163 states and 2744 transitions. [2020-08-22 18:59:51,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 18:59:51,248 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 209 [2020-08-22 18:59:51,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 18:59:51,256 INFO L225 Difference]: With dead ends: 2163 [2020-08-22 18:59:51,256 INFO L226 Difference]: Without dead ends: 1208 [2020-08-22 18:59:51,260 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-22 18:59:51,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1208 states. [2020-08-22 18:59:51,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1208 to 1131. [2020-08-22 18:59:51,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1131 states. [2020-08-22 18:59:51,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1131 states to 1131 states and 1419 transitions. [2020-08-22 18:59:51,395 INFO L78 Accepts]: Start accepts. Automaton has 1131 states and 1419 transitions. Word has length 209 [2020-08-22 18:59:51,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 18:59:51,396 INFO L479 AbstractCegarLoop]: Abstraction has 1131 states and 1419 transitions. [2020-08-22 18:59:51,396 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 18:59:51,396 INFO L276 IsEmpty]: Start isEmpty. Operand 1131 states and 1419 transitions. [2020-08-22 18:59:51,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2020-08-22 18:59:51,400 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 18:59:51,401 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 18:59:51,401 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-22 18:59:51,401 INFO L427 AbstractCegarLoop]: === Iteration 10 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 18:59:51,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 18:59:51,402 INFO L82 PathProgramCache]: Analyzing trace with hash 1999743939, now seen corresponding path program 1 times [2020-08-22 18:59:51,402 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 18:59:51,402 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1726948014] [2020-08-22 18:59:51,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 18:59:51,415 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 18:59:51,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:59:51,466 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 18:59:51,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:59:51,496 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 18:59:51,497 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1726948014] [2020-08-22 18:59:51,497 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 18:59:51,497 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 18:59:51,497 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051533595] [2020-08-22 18:59:51,498 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 18:59:51,499 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 18:59:51,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 18:59:51,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 18:59:51,499 INFO L87 Difference]: Start difference. First operand 1131 states and 1419 transitions. Second operand 3 states. [2020-08-22 18:59:51,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 18:59:51,882 INFO L93 Difference]: Finished difference Result 2295 states and 2960 transitions. [2020-08-22 18:59:51,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 18:59:51,883 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 211 [2020-08-22 18:59:51,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 18:59:51,892 INFO L225 Difference]: With dead ends: 2295 [2020-08-22 18:59:51,892 INFO L226 Difference]: Without dead ends: 1284 [2020-08-22 18:59:51,898 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 18:59:51,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1284 states. [2020-08-22 18:59:52,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1284 to 1207. [2020-08-22 18:59:52,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1207 states. [2020-08-22 18:59:52,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1207 states to 1207 states and 1529 transitions. [2020-08-22 18:59:52,139 INFO L78 Accepts]: Start accepts. Automaton has 1207 states and 1529 transitions. Word has length 211 [2020-08-22 18:59:52,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 18:59:52,140 INFO L479 AbstractCegarLoop]: Abstraction has 1207 states and 1529 transitions. [2020-08-22 18:59:52,141 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 18:59:52,141 INFO L276 IsEmpty]: Start isEmpty. Operand 1207 states and 1529 transitions. [2020-08-22 18:59:52,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2020-08-22 18:59:52,148 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 18:59:52,149 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 18:59:52,149 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-22 18:59:52,149 INFO L427 AbstractCegarLoop]: === Iteration 11 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 18:59:52,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 18:59:52,150 INFO L82 PathProgramCache]: Analyzing trace with hash 1941211029, now seen corresponding path program 1 times [2020-08-22 18:59:52,150 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 18:59:52,150 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1691801414] [2020-08-22 18:59:52,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 18:59:52,168 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 18:59:52,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:59:52,243 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 18:59:52,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:59:52,282 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 18:59:52,283 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1691801414] [2020-08-22 18:59:52,283 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 18:59:52,283 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 18:59:52,283 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112521453] [2020-08-22 18:59:52,284 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 18:59:52,284 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 18:59:52,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 18:59:52,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 18:59:52,285 INFO L87 Difference]: Start difference. First operand 1207 states and 1529 transitions. Second operand 4 states. [2020-08-22 18:59:52,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 18:59:52,973 INFO L93 Difference]: Finished difference Result 3413 states and 4441 transitions. [2020-08-22 18:59:52,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 18:59:52,973 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 216 [2020-08-22 18:59:52,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 18:59:52,988 INFO L225 Difference]: With dead ends: 3413 [2020-08-22 18:59:52,988 INFO L226 Difference]: Without dead ends: 2338 [2020-08-22 18:59:52,993 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-22 18:59:52,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2338 states. [2020-08-22 18:59:53,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2338 to 1243. [2020-08-22 18:59:53,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1243 states. [2020-08-22 18:59:53,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1243 states to 1243 states and 1583 transitions. [2020-08-22 18:59:53,157 INFO L78 Accepts]: Start accepts. Automaton has 1243 states and 1583 transitions. Word has length 216 [2020-08-22 18:59:53,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 18:59:53,157 INFO L479 AbstractCegarLoop]: Abstraction has 1243 states and 1583 transitions. [2020-08-22 18:59:53,157 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 18:59:53,158 INFO L276 IsEmpty]: Start isEmpty. Operand 1243 states and 1583 transitions. [2020-08-22 18:59:53,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2020-08-22 18:59:53,162 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 18:59:53,163 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 18:59:53,163 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-22 18:59:53,163 INFO L427 AbstractCegarLoop]: === Iteration 12 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 18:59:53,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 18:59:53,164 INFO L82 PathProgramCache]: Analyzing trace with hash -165389337, now seen corresponding path program 1 times [2020-08-22 18:59:53,164 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 18:59:53,164 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [91718714] [2020-08-22 18:59:53,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 18:59:53,175 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 18:59:53,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:59:53,260 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 18:59:53,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:59:53,295 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 18:59:53,296 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [91718714] [2020-08-22 18:59:53,296 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 18:59:53,296 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 18:59:53,296 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544290031] [2020-08-22 18:59:53,297 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 18:59:53,297 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 18:59:53,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 18:59:53,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 18:59:53,298 INFO L87 Difference]: Start difference. First operand 1243 states and 1583 transitions. Second operand 3 states. [2020-08-22 18:59:53,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 18:59:53,541 INFO L93 Difference]: Finished difference Result 2889 states and 3745 transitions. [2020-08-22 18:59:53,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 18:59:53,541 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 232 [2020-08-22 18:59:53,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 18:59:53,552 INFO L225 Difference]: With dead ends: 2889 [2020-08-22 18:59:53,552 INFO L226 Difference]: Without dead ends: 1802 [2020-08-22 18:59:53,556 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 18:59:53,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1802 states. [2020-08-22 18:59:53,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1802 to 1800. [2020-08-22 18:59:53,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1800 states. [2020-08-22 18:59:53,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1800 states to 1800 states and 2315 transitions. [2020-08-22 18:59:53,736 INFO L78 Accepts]: Start accepts. Automaton has 1800 states and 2315 transitions. Word has length 232 [2020-08-22 18:59:53,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 18:59:53,736 INFO L479 AbstractCegarLoop]: Abstraction has 1800 states and 2315 transitions. [2020-08-22 18:59:53,736 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 18:59:53,737 INFO L276 IsEmpty]: Start isEmpty. Operand 1800 states and 2315 transitions. [2020-08-22 18:59:53,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2020-08-22 18:59:53,742 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 18:59:53,742 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 18:59:53,743 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-22 18:59:53,743 INFO L427 AbstractCegarLoop]: === Iteration 13 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 18:59:53,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 18:59:53,743 INFO L82 PathProgramCache]: Analyzing trace with hash -662598379, now seen corresponding path program 1 times [2020-08-22 18:59:53,744 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 18:59:53,744 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [567301309] [2020-08-22 18:59:53,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 18:59:53,755 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 18:59:53,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:59:53,822 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 18:59:53,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:59:53,878 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 18:59:53,879 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [567301309] [2020-08-22 18:59:53,879 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 18:59:53,879 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 18:59:53,879 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300282993] [2020-08-22 18:59:53,880 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 18:59:53,880 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 18:59:53,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 18:59:53,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 18:59:53,881 INFO L87 Difference]: Start difference. First operand 1800 states and 2315 transitions. Second operand 4 states. [2020-08-22 18:59:54,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 18:59:54,668 INFO L93 Difference]: Finished difference Result 5166 states and 6784 transitions. [2020-08-22 18:59:54,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 18:59:54,669 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 244 [2020-08-22 18:59:54,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 18:59:54,687 INFO L225 Difference]: With dead ends: 5166 [2020-08-22 18:59:54,688 INFO L226 Difference]: Without dead ends: 3522 [2020-08-22 18:59:54,694 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-22 18:59:54,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3522 states. [2020-08-22 18:59:54,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3522 to 1809. [2020-08-22 18:59:54,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1809 states. [2020-08-22 18:59:54,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1809 states to 1809 states and 2324 transitions. [2020-08-22 18:59:54,919 INFO L78 Accepts]: Start accepts. Automaton has 1809 states and 2324 transitions. Word has length 244 [2020-08-22 18:59:54,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 18:59:54,919 INFO L479 AbstractCegarLoop]: Abstraction has 1809 states and 2324 transitions. [2020-08-22 18:59:54,919 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 18:59:54,920 INFO L276 IsEmpty]: Start isEmpty. Operand 1809 states and 2324 transitions. [2020-08-22 18:59:54,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2020-08-22 18:59:54,928 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 18:59:54,929 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 18:59:54,929 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-22 18:59:54,930 INFO L427 AbstractCegarLoop]: === Iteration 14 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 18:59:54,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 18:59:54,931 INFO L82 PathProgramCache]: Analyzing trace with hash 435015861, now seen corresponding path program 1 times [2020-08-22 18:59:54,931 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 18:59:54,931 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1261359357] [2020-08-22 18:59:54,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 18:59:54,939 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 18:59:54,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:59:55,008 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 18:59:55,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:59:55,092 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 18:59:55,093 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1261359357] [2020-08-22 18:59:55,093 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 18:59:55,094 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 18:59:55,094 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943849872] [2020-08-22 18:59:55,095 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 18:59:55,095 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 18:59:55,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 18:59:55,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 18:59:55,096 INFO L87 Difference]: Start difference. First operand 1809 states and 2324 transitions. Second operand 4 states. [2020-08-22 18:59:55,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 18:59:55,837 INFO L93 Difference]: Finished difference Result 5214 states and 6800 transitions. [2020-08-22 18:59:55,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 18:59:55,838 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 244 [2020-08-22 18:59:55,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 18:59:55,857 INFO L225 Difference]: With dead ends: 5214 [2020-08-22 18:59:55,857 INFO L226 Difference]: Without dead ends: 3537 [2020-08-22 18:59:55,864 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-22 18:59:55,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3537 states. [2020-08-22 18:59:56,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3537 to 1849. [2020-08-22 18:59:56,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1849 states. [2020-08-22 18:59:56,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1849 states to 1849 states and 2386 transitions. [2020-08-22 18:59:56,075 INFO L78 Accepts]: Start accepts. Automaton has 1849 states and 2386 transitions. Word has length 244 [2020-08-22 18:59:56,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 18:59:56,075 INFO L479 AbstractCegarLoop]: Abstraction has 1849 states and 2386 transitions. [2020-08-22 18:59:56,075 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 18:59:56,076 INFO L276 IsEmpty]: Start isEmpty. Operand 1849 states and 2386 transitions. [2020-08-22 18:59:56,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2020-08-22 18:59:56,082 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 18:59:56,082 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 18:59:56,082 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-22 18:59:56,083 INFO L427 AbstractCegarLoop]: === Iteration 15 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 18:59:56,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 18:59:56,083 INFO L82 PathProgramCache]: Analyzing trace with hash -173027549, now seen corresponding path program 1 times [2020-08-22 18:59:56,083 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 18:59:56,084 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1221438194] [2020-08-22 18:59:56,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 18:59:56,095 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 18:59:56,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:59:56,172 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 18:59:56,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:59:56,250 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 18:59:56,251 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1221438194] [2020-08-22 18:59:56,251 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 18:59:56,251 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 18:59:56,251 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537527243] [2020-08-22 18:59:56,252 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 18:59:56,252 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 18:59:56,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 18:59:56,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 18:59:56,253 INFO L87 Difference]: Start difference. First operand 1849 states and 2386 transitions. Second operand 4 states. [2020-08-22 18:59:56,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 18:59:56,982 INFO L93 Difference]: Finished difference Result 4492 states and 5930 transitions. [2020-08-22 18:59:56,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 18:59:56,983 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 247 [2020-08-22 18:59:56,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 18:59:56,997 INFO L225 Difference]: With dead ends: 4492 [2020-08-22 18:59:56,998 INFO L226 Difference]: Without dead ends: 2769 [2020-08-22 18:59:57,004 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-22 18:59:57,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2769 states. [2020-08-22 18:59:57,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2769 to 1400. [2020-08-22 18:59:57,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1400 states. [2020-08-22 18:59:57,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1400 states to 1400 states and 1741 transitions. [2020-08-22 18:59:57,168 INFO L78 Accepts]: Start accepts. Automaton has 1400 states and 1741 transitions. Word has length 247 [2020-08-22 18:59:57,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 18:59:57,169 INFO L479 AbstractCegarLoop]: Abstraction has 1400 states and 1741 transitions. [2020-08-22 18:59:57,169 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 18:59:57,169 INFO L276 IsEmpty]: Start isEmpty. Operand 1400 states and 1741 transitions. [2020-08-22 18:59:57,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2020-08-22 18:59:57,175 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 18:59:57,175 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 18:59:57,176 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-22 18:59:57,176 INFO L427 AbstractCegarLoop]: === Iteration 16 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 18:59:57,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 18:59:57,177 INFO L82 PathProgramCache]: Analyzing trace with hash -196875119, now seen corresponding path program 1 times [2020-08-22 18:59:57,177 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 18:59:57,177 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1969813235] [2020-08-22 18:59:57,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 18:59:57,186 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 18:59:57,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-22 18:59:57,222 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-08-22 18:59:57,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-22 18:59:57,249 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-08-22 18:59:57,345 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-22 18:59:57,345 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-22 18:59:57,346 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-22 18:59:57,378 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.08 06:59:57 BoogieIcfgContainer [2020-08-22 18:59:57,378 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-22 18:59:57,381 INFO L168 Benchmark]: Toolchain (without parser) took 13971.59 ms. Allocated memory was 144.7 MB in the beginning and 577.2 MB in the end (delta: 432.5 MB). Free memory was 101.2 MB in the beginning and 108.6 MB in the end (delta: -7.5 MB). Peak memory consumption was 425.1 MB. Max. memory is 7.1 GB. [2020-08-22 18:59:57,382 INFO L168 Benchmark]: CDTParser took 0.83 ms. Allocated memory is still 144.7 MB. Free memory was 120.4 MB in the beginning and 120.2 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-08-22 18:59:57,382 INFO L168 Benchmark]: CACSL2BoogieTranslator took 545.29 ms. Allocated memory was 144.7 MB in the beginning and 202.4 MB in the end (delta: 57.7 MB). Free memory was 100.9 MB in the beginning and 177.6 MB in the end (delta: -76.7 MB). Peak memory consumption was 23.5 MB. Max. memory is 7.1 GB. [2020-08-22 18:59:57,383 INFO L168 Benchmark]: Boogie Preprocessor took 61.24 ms. Allocated memory is still 202.4 MB. Free memory was 177.6 MB in the beginning and 174.5 MB in the end (delta: 3.1 MB). Peak memory consumption was 3.1 MB. Max. memory is 7.1 GB. [2020-08-22 18:59:57,384 INFO L168 Benchmark]: RCFGBuilder took 977.68 ms. Allocated memory is still 202.4 MB. Free memory was 174.5 MB in the beginning and 101.2 MB in the end (delta: 73.3 MB). Peak memory consumption was 73.3 MB. Max. memory is 7.1 GB. [2020-08-22 18:59:57,384 INFO L168 Benchmark]: TraceAbstraction took 12381.70 ms. Allocated memory was 202.4 MB in the beginning and 577.2 MB in the end (delta: 374.9 MB). Free memory was 100.5 MB in the beginning and 108.6 MB in the end (delta: -8.1 MB). Peak memory consumption was 366.7 MB. Max. memory is 7.1 GB. [2020-08-22 18:59:57,387 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.83 ms. Allocated memory is still 144.7 MB. Free memory was 120.4 MB in the beginning and 120.2 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 545.29 ms. Allocated memory was 144.7 MB in the beginning and 202.4 MB in the end (delta: 57.7 MB). Free memory was 100.9 MB in the beginning and 177.6 MB in the end (delta: -76.7 MB). Peak memory consumption was 23.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 61.24 ms. Allocated memory is still 202.4 MB. Free memory was 177.6 MB in the beginning and 174.5 MB in the end (delta: 3.1 MB). Peak memory consumption was 3.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 977.68 ms. Allocated memory is still 202.4 MB. Free memory was 174.5 MB in the beginning and 101.2 MB in the end (delta: 73.3 MB). Peak memory consumption was 73.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 12381.70 ms. Allocated memory was 202.4 MB in the beginning and 577.2 MB in the end (delta: 374.9 MB). Free memory was 100.5 MB in the beginning and 108.6 MB in the end (delta: -8.1 MB). Peak memory consumption was 366.7 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 642]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L647] int s ; [L648] int tmp ; [L652] s = 8464 [L653] CALL ssl3_accept(s) [L11] int s__info_callback = __VERIFIER_nondet_int() ; [L12] int s__in_handshake = __VERIFIER_nondet_int() ; [L13] int s__state ; [L14] int s__new_session ; [L15] int s__server ; [L16] int s__version = __VERIFIER_nondet_int() ; [L17] int s__type ; [L18] int s__init_num ; [L19] int s__hit = __VERIFIER_nondet_int() ; [L20] int s__rwstate ; [L21] int s__init_buf___0 = 1; [L22] int s__debug = __VERIFIER_nondet_int() ; [L23] int s__shutdown ; [L24] int s__cert = __VERIFIER_nondet_int() ; [L25] int s__options = __VERIFIER_nondet_int() ; [L26] int s__verify_mode = __VERIFIER_nondet_int() ; [L27] int s__session__peer = __VERIFIER_nondet_int() ; [L28] int s__cert__pkeys__AT0__privatekey = __VERIFIER_nondet_int() ; [L29] int s__ctx__info_callback = __VERIFIER_nondet_int() ; [L30] int s__ctx__stats__sess_accept_renegotiate = __VERIFIER_nondet_int() ; [L31] int s__ctx__stats__sess_accept = __VERIFIER_nondet_int() ; [L32] int s__ctx__stats__sess_accept_good = __VERIFIER_nondet_int() ; [L33] int s__s3__tmp__cert_request ; [L34] int s__s3__tmp__reuse_message ; [L35] int s__s3__tmp__use_rsa_tmp ; [L36] int s__s3__tmp__new_cipher = __VERIFIER_nondet_int() ; [L37] int s__s3__tmp__new_cipher__algorithms ; [L38] int s__s3__tmp__next_state___0 ; [L39] int s__s3__tmp__new_cipher__algo_strength ; [L40] int s__session__cipher ; [L41] int buf ; [L42] unsigned long l ; [L43] unsigned long Time ; [L44] unsigned long tmp ; [L45] int cb ; [L46] long num1 = __VERIFIER_nondet_long() ; [L47] int ret ; [L48] int new_state ; [L49] int state ; [L50] int skip ; [L51] int got_new_session ; [L52] int tmp___1 = __VERIFIER_nondet_int() ; [L53] int tmp___2 = __VERIFIER_nondet_int() ; [L54] int tmp___3 = __VERIFIER_nondet_int() ; [L55] int tmp___4 = __VERIFIER_nondet_int() ; [L56] int tmp___5 = __VERIFIER_nondet_int() ; [L57] int tmp___6 = __VERIFIER_nondet_int() ; [L58] int tmp___7 = __VERIFIER_nondet_int() ; [L59] long tmp___8 = __VERIFIER_nondet_long() ; [L60] int tmp___9 = __VERIFIER_nondet_int() ; [L61] int tmp___10 = __VERIFIER_nondet_int() ; [L62] int blastFlag ; [L63] int __cil_tmp55 ; [L64] unsigned long __cil_tmp56 ; [L65] unsigned long __cil_tmp57 ; [L66] unsigned long __cil_tmp58 ; [L67] unsigned long __cil_tmp59 ; [L68] int __cil_tmp60 ; [L69] unsigned long __cil_tmp61 ; [L72] s__state = initial_state [L73] blastFlag = 0 [L74] tmp = __VERIFIER_nondet_int() [L75] Time = tmp [L76] cb = 0 [L77] ret = -1 [L78] skip = 0 [L79] got_new_session = 0 [L80] COND TRUE s__info_callback != 0 [L81] cb = s__info_callback [L87] s__in_handshake ++ [L88] COND FALSE !(tmp___1 + 12288) [L93] COND FALSE !(s__cert == 0) [L97] COND TRUE 1 [L99] state = s__state [L100] COND FALSE !(s__state == 12292) [L103] COND FALSE !(s__state == 16384) [L106] COND FALSE !(s__state == 8192) [L109] COND FALSE !(s__state == 24576) [L112] COND FALSE !(s__state == 8195) [L115] COND FALSE !(s__state == 8480) [L118] COND FALSE !(s__state == 8481) [L121] COND FALSE !(s__state == 8482) [L124] COND TRUE s__state == 8464 [L270] s__shutdown = 0 [L271] ret = __VERIFIER_nondet_int() [L272] COND TRUE blastFlag == 0 [L273] blastFlag = 1 [L275] COND FALSE !(ret <= 0) [L278] got_new_session = 1 [L279] s__state = 8496 [L280] s__init_num = 0 [L599] s__s3__tmp__reuse_message = __VERIFIER_nondet_int() [L600] COND FALSE !(! s__s3__tmp__reuse_message) [L631] skip = 0 [L97] COND TRUE 1 [L99] state = s__state [L100] COND FALSE !(s__state == 12292) [L103] COND FALSE !(s__state == 16384) [L106] COND FALSE !(s__state == 8192) [L109] COND FALSE !(s__state == 24576) [L112] COND FALSE !(s__state == 8195) [L115] COND FALSE !(s__state == 8480) [L118] COND FALSE !(s__state == 8481) [L121] COND FALSE !(s__state == 8482) [L124] COND FALSE !(s__state == 8464) [L127] COND FALSE !(s__state == 8465) [L130] COND FALSE !(s__state == 8466) [L133] COND TRUE s__state == 8496 [L284] ret = __VERIFIER_nondet_int() [L285] COND TRUE blastFlag == 1 [L286] blastFlag = 2 [L288] COND FALSE !(ret <= 0) [L291] COND FALSE !(\read(s__hit)) [L294] s__state = 8512 [L296] s__init_num = 0 [L599] s__s3__tmp__reuse_message = __VERIFIER_nondet_int() [L600] COND FALSE !(! s__s3__tmp__reuse_message) [L631] skip = 0 [L97] COND TRUE 1 [L99] state = s__state [L100] COND FALSE !(s__state == 12292) [L103] COND FALSE !(s__state == 16384) [L106] COND FALSE !(s__state == 8192) [L109] COND FALSE !(s__state == 24576) [L112] COND FALSE !(s__state == 8195) [L115] COND FALSE !(s__state == 8480) [L118] COND FALSE !(s__state == 8481) [L121] COND FALSE !(s__state == 8482) [L124] COND FALSE !(s__state == 8464) [L127] COND FALSE !(s__state == 8465) [L130] COND FALSE !(s__state == 8466) [L133] COND FALSE !(s__state == 8496) [L136] COND FALSE !(s__state == 8497) [L139] COND TRUE s__state == 8512 [L301] s__s3__tmp__new_cipher__algorithms = __VERIFIER_nondet_int() [L302] __cil_tmp56 = (unsigned long )s__s3__tmp__new_cipher__algorithms [L303] COND TRUE __cil_tmp56 + 256UL [L304] skip = 1 [L315] s__state = 8528 [L316] s__init_num = 0 [L599] s__s3__tmp__reuse_message = __VERIFIER_nondet_int() [L600] COND FALSE !(! s__s3__tmp__reuse_message) [L631] skip = 0 [L97] COND TRUE 1 [L99] state = s__state [L100] COND FALSE !(s__state == 12292) [L103] COND FALSE !(s__state == 16384) [L106] COND FALSE !(s__state == 8192) [L109] COND FALSE !(s__state == 24576) [L112] COND FALSE !(s__state == 8195) [L115] COND FALSE !(s__state == 8480) [L118] COND FALSE !(s__state == 8481) [L121] COND FALSE !(s__state == 8482) [L124] COND FALSE !(s__state == 8464) [L127] COND FALSE !(s__state == 8465) [L130] COND FALSE !(s__state == 8466) [L133] COND FALSE !(s__state == 8496) [L136] COND FALSE !(s__state == 8497) [L139] COND FALSE !(s__state == 8512) [L142] COND FALSE !(s__state == 8513) [L145] COND TRUE s__state == 8528 [L320] s__s3__tmp__new_cipher__algorithms = __VERIFIER_nondet_int() [L321] l = (unsigned long )s__s3__tmp__new_cipher__algorithms [L323] __cil_tmp57 = (unsigned long )s__options [L324] COND TRUE __cil_tmp57 + 2097152UL [L325] s__s3__tmp__use_rsa_tmp = 1 [L330] COND TRUE \read(s__s3__tmp__use_rsa_tmp) [L357] ret = __VERIFIER_nondet_int() [L358] COND FALSE !(blastFlag == 6) [L361] COND FALSE !(ret <= 0) [L378] s__state = 8544 [L379] s__init_num = 0 [L599] s__s3__tmp__reuse_message = __VERIFIER_nondet_int() [L600] COND TRUE ! s__s3__tmp__reuse_message [L601] COND TRUE ! skip [L602] COND TRUE state == 8528 [L603] COND TRUE s__state == 8544 [L604] COND TRUE tmp___7 != 1024 [L605] COND TRUE tmp___7 != 512 [L606] COND TRUE __cil_tmp58 != 4294967294 [L607] COND TRUE l != 4294967266 [L642] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 440 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 12.2s, OverallIterations: 16, TraceHistogramMax: 4, AutomataDifference: 7.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 8226 SDtfs, 6707 SDslu, 8930 SDs, 0 SdLazy, 2374 SolverSat, 495 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 104 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1849occurred in iteration=14, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 2.0s AutomataMinimizationTime, 15 MinimizatonAttempts, 6174 StatesRemovedByMinimization, 15 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: No data available, 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 incorrect! Received shutdown request...