/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 0.1.25-3af5e1f [2020-09-04 16:33:34,588 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-04 16:33:34,592 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-04 16:33:34,639 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-09-04 16:33:34,664 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-04 16:33:34,665 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-04 16:33:34,666 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-04 16:33:34,668 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-04 16:33:34,669 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-04 16:33:34,670 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-04 16:33:34,672 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-04 16:33:34,674 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-04 16:33:34,675 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-04 16:33:34,676 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-04 16:33:34,678 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-04 16:33:34,679 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-04 16:33:34,681 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-09-04 16:33:34,690 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-04 16:33:34,691 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-04 16:33:34,692 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-04 16:33:34,693 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-09-04 16:33:34,705 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-04 16:33:34,705 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-04 16:33:34,707 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-04 16:33:34,707 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-04 16:33:34,707 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-04 16:33:34,708 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-04 16:33:34,708 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-04 16:33:34,708 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-04 16:33:34,708 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-04 16:33:34,708 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-04 16:33:34,709 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-04 16:33:34,709 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-04 16:33:34,709 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-04 16:33:34,709 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-04 16:33:34,709 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-04 16:33:34,710 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-09-04 16:33:34,710 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-04 16:33:34,710 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-04 16:33:34,710 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-04 16:33:34,711 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-04 16:33:34,711 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-09-04 16:33:34,711 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-04 16:33:34,711 INFO L138 SettingsManager]: * Use separate solver for trace checks=false [2020-09-04 16:33:35,173 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-04 16:33:35,188 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-04 16:33:35,195 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-04 16:33:35,197 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-04 16:33:35,198 INFO L275 PluginConnector]: CDTParser initialized [2020-09-04 16:33:35,199 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ssh-simplified/s3_srvr_13.cil.c [2020-09-04 16:33:35,279 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5281ab866/71f1caf048224336a6ab48ff91d57585/FLAG1401eb32c [2020-09-04 16:33:35,901 INFO L306 CDTParser]: Found 1 translation units. [2020-09-04 16:33:35,902 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/ssh-simplified/s3_srvr_13.cil.c [2020-09-04 16:33:35,921 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5281ab866/71f1caf048224336a6ab48ff91d57585/FLAG1401eb32c [2020-09-04 16:33:36,170 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5281ab866/71f1caf048224336a6ab48ff91d57585 [2020-09-04 16:33:36,185 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-04 16:33:36,187 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-04 16:33:36,189 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-04 16:33:36,189 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-04 16:33:36,192 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-04 16:33:36,193 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 04:33:36" (1/1) ... [2020-09-04 16:33:36,198 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@231fe863 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:33:36, skipping insertion in model container [2020-09-04 16:33:36,198 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 04:33:36" (1/1) ... [2020-09-04 16:33:36,207 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-04 16:33:36,275 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-04 16:33:36,575 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 16:33:36,583 INFO L203 MainTranslator]: Completed pre-run [2020-09-04 16:33:36,736 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 16:33:36,755 INFO L208 MainTranslator]: Completed translation [2020-09-04 16:33:36,755 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:33:36 WrapperNode [2020-09-04 16:33:36,755 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-04 16:33:36,756 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-04 16:33:36,757 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-04 16:33:36,757 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-04 16:33:36,776 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:33:36" (1/1) ... [2020-09-04 16:33:36,776 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:33:36" (1/1) ... [2020-09-04 16:33:36,787 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:33:36" (1/1) ... [2020-09-04 16:33:36,787 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:33:36" (1/1) ... [2020-09-04 16:33:36,803 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:33:36" (1/1) ... [2020-09-04 16:33:36,819 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:33:36" (1/1) ... [2020-09-04 16:33:36,823 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:33:36" (1/1) ... [2020-09-04 16:33:36,829 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-04 16:33:36,829 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-04 16:33:36,829 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-04 16:33:36,830 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-04 16:33:36,831 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:33:36" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-04 16:33:36,912 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-04 16:33:36,913 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-04 16:33:36,913 INFO L138 BoogieDeclarations]: Found implementation of procedure ssl3_accept [2020-09-04 16:33:36,913 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-04 16:33:36,913 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-04 16:33:36,913 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-09-04 16:33:36,913 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-04 16:33:36,913 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_long [2020-09-04 16:33:36,913 INFO L130 BoogieDeclarations]: Found specification of procedure ssl3_accept [2020-09-04 16:33:36,914 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-04 16:33:36,914 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-04 16:33:36,914 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-04 16:33:37,127 WARN L779 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2020-09-04 16:33:37,868 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##90: assume false; [2020-09-04 16:33:37,868 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##91: assume !false; [2020-09-04 16:33:37,887 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-04 16:33:37,888 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-04 16:33:37,896 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 04:33:37 BoogieIcfgContainer [2020-09-04 16:33:37,896 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-04 16:33:37,898 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-04 16:33:37,899 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-04 16:33:37,903 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-04 16:33:37,903 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.09 04:33:36" (1/3) ... [2020-09-04 16:33:37,904 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ca9aa87 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 04:33:37, skipping insertion in model container [2020-09-04 16:33:37,904 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:33:36" (2/3) ... [2020-09-04 16:33:37,905 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ca9aa87 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 04:33:37, skipping insertion in model container [2020-09-04 16:33:37,905 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 04:33:37" (3/3) ... [2020-09-04 16:33:37,907 INFO L109 eAbstractionObserver]: Analyzing ICFG s3_srvr_13.cil.c [2020-09-04 16:33:37,921 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-04 16:33:37,933 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-04 16:33:37,956 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-04 16:33:37,987 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-04 16:33:37,987 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-04 16:33:37,987 INFO L377 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-09-04 16:33:37,988 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-04 16:33:37,988 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-04 16:33:37,988 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-04 16:33:37,988 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-04 16:33:37,988 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-04 16:33:38,017 INFO L276 IsEmpty]: Start isEmpty. Operand 440 states. [2020-09-04 16:33:38,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2020-09-04 16:33:38,044 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 16:33:38,046 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] [2020-09-04 16:33:38,046 INFO L427 AbstractCegarLoop]: === Iteration 1 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 16:33:38,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 16:33:38,055 INFO L82 PathProgramCache]: Analyzing trace with hash 1103530067, now seen corresponding path program 1 times [2020-09-04 16:33:38,068 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 16:33:38,068 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1827601356] [2020-09-04 16:33:38,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 16:33:38,166 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 16:33:38,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:33:38,632 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 16:33:38,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:33:38,683 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 16:33:38,686 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1827601356] [2020-09-04 16:33:38,689 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 16:33:38,689 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-09-04 16:33:38,690 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118821036] [2020-09-04 16:33:38,697 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-04 16:33:38,697 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 16:33:38,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-04 16:33:38,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-09-04 16:33:38,719 INFO L87 Difference]: Start difference. First operand 440 states. Second operand 6 states. [2020-09-04 16:33:39,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 16:33:39,248 INFO L93 Difference]: Finished difference Result 832 states and 1103 transitions. [2020-09-04 16:33:39,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-04 16:33:39,251 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 160 [2020-09-04 16:33:39,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 16:33:39,275 INFO L225 Difference]: With dead ends: 832 [2020-09-04 16:33:39,275 INFO L226 Difference]: Without dead ends: 472 [2020-09-04 16:33:39,285 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 [2020-09-04 16:33:39,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2020-09-04 16:33:39,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 459. [2020-09-04 16:33:39,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 459 states. [2020-09-04 16:33:39,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 459 states to 459 states and 549 transitions. [2020-09-04 16:33:39,490 INFO L78 Accepts]: Start accepts. Automaton has 459 states and 549 transitions. Word has length 160 [2020-09-04 16:33:39,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 16:33:39,494 INFO L479 AbstractCegarLoop]: Abstraction has 459 states and 549 transitions. [2020-09-04 16:33:39,494 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-04 16:33:39,495 INFO L276 IsEmpty]: Start isEmpty. Operand 459 states and 549 transitions. [2020-09-04 16:33:39,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2020-09-04 16:33:39,507 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 16:33:39,508 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] [2020-09-04 16:33:39,508 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-04 16:33:39,508 INFO L427 AbstractCegarLoop]: === Iteration 2 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 16:33:39,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 16:33:39,509 INFO L82 PathProgramCache]: Analyzing trace with hash -466072829, now seen corresponding path program 1 times [2020-09-04 16:33:39,509 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 16:33:39,510 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [704189013] [2020-09-04 16:33:39,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 16:33:39,515 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 16:33:39,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:33:39,695 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 16:33:39,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:33:39,715 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 16:33:39,716 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [704189013] [2020-09-04 16:33:39,716 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 16:33:39,716 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-04 16:33:39,717 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143318226] [2020-09-04 16:33:39,718 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-04 16:33:39,718 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 16:33:39,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-04 16:33:39,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-04 16:33:39,719 INFO L87 Difference]: Start difference. First operand 459 states and 549 transitions. Second operand 3 states. [2020-09-04 16:33:39,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 16:33:39,874 INFO L93 Difference]: Finished difference Result 1085 states and 1347 transitions. [2020-09-04 16:33:39,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-04 16:33:39,875 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 169 [2020-09-04 16:33:39,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 16:33:39,882 INFO L225 Difference]: With dead ends: 1085 [2020-09-04 16:33:39,882 INFO L226 Difference]: Without dead ends: 766 [2020-09-04 16:33:39,886 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 [2020-09-04 16:33:39,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 766 states. [2020-09-04 16:33:39,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 766 to 764. [2020-09-04 16:33:39,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 764 states. [2020-09-04 16:33:39,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 764 states to 764 states and 931 transitions. [2020-09-04 16:33:39,963 INFO L78 Accepts]: Start accepts. Automaton has 764 states and 931 transitions. Word has length 169 [2020-09-04 16:33:39,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 16:33:39,964 INFO L479 AbstractCegarLoop]: Abstraction has 764 states and 931 transitions. [2020-09-04 16:33:39,964 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-04 16:33:39,964 INFO L276 IsEmpty]: Start isEmpty. Operand 764 states and 931 transitions. [2020-09-04 16:33:39,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2020-09-04 16:33:39,968 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 16:33:39,969 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] [2020-09-04 16:33:39,970 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-04 16:33:39,970 INFO L427 AbstractCegarLoop]: === Iteration 3 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 16:33:39,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 16:33:39,970 INFO L82 PathProgramCache]: Analyzing trace with hash -1669990880, now seen corresponding path program 1 times [2020-09-04 16:33:39,971 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 16:33:39,971 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1137071994] [2020-09-04 16:33:39,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 16:33:39,973 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 16:33:40,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:33:40,045 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 16:33:40,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:33:40,109 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 16:33:40,110 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1137071994] [2020-09-04 16:33:40,110 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 16:33:40,111 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-04 16:33:40,111 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541019968] [2020-09-04 16:33:40,112 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-04 16:33:40,113 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 16:33:40,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-04 16:33:40,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-04 16:33:40,114 INFO L87 Difference]: Start difference. First operand 764 states and 931 transitions. Second operand 3 states. [2020-09-04 16:33:40,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 16:33:40,448 INFO L93 Difference]: Finished difference Result 1539 states and 1955 transitions. [2020-09-04 16:33:40,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-04 16:33:40,448 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 170 [2020-09-04 16:33:40,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 16:33:40,455 INFO L225 Difference]: With dead ends: 1539 [2020-09-04 16:33:40,456 INFO L226 Difference]: Without dead ends: 891 [2020-09-04 16:33:40,458 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 [2020-09-04 16:33:40,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 891 states. [2020-09-04 16:33:40,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 891 to 822. [2020-09-04 16:33:40,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 822 states. [2020-09-04 16:33:40,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 822 states to 822 states and 1019 transitions. [2020-09-04 16:33:40,522 INFO L78 Accepts]: Start accepts. Automaton has 822 states and 1019 transitions. Word has length 170 [2020-09-04 16:33:40,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 16:33:40,523 INFO L479 AbstractCegarLoop]: Abstraction has 822 states and 1019 transitions. [2020-09-04 16:33:40,523 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-04 16:33:40,523 INFO L276 IsEmpty]: Start isEmpty. Operand 822 states and 1019 transitions. [2020-09-04 16:33:40,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2020-09-04 16:33:40,526 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 16:33:40,526 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] [2020-09-04 16:33:40,527 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-04 16:33:40,527 INFO L427 AbstractCegarLoop]: === Iteration 4 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 16:33:40,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 16:33:40,528 INFO L82 PathProgramCache]: Analyzing trace with hash -1230208187, now seen corresponding path program 1 times [2020-09-04 16:33:40,528 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 16:33:40,529 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [677873747] [2020-09-04 16:33:40,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 16:33:40,531 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 16:33:40,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:33:40,639 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 16:33:40,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:33:40,698 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 16:33:40,699 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [677873747] [2020-09-04 16:33:40,699 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 16:33:40,700 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-09-04 16:33:40,700 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826630765] [2020-09-04 16:33:40,701 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-04 16:33:40,701 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 16:33:40,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-04 16:33:40,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-09-04 16:33:40,702 INFO L87 Difference]: Start difference. First operand 822 states and 1019 transitions. Second operand 6 states. [2020-09-04 16:33:41,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 16:33:41,090 INFO L93 Difference]: Finished difference Result 1293 states and 1643 transitions. [2020-09-04 16:33:41,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-04 16:33:41,090 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 175 [2020-09-04 16:33:41,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 16:33:41,094 INFO L225 Difference]: With dead ends: 1293 [2020-09-04 16:33:41,094 INFO L226 Difference]: Without dead ends: 585 [2020-09-04 16:33:41,096 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 [2020-09-04 16:33:41,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 585 states. [2020-09-04 16:33:41,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 585 to 569. [2020-09-04 16:33:41,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 569 states. [2020-09-04 16:33:41,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 569 states to 569 states and 703 transitions. [2020-09-04 16:33:41,145 INFO L78 Accepts]: Start accepts. Automaton has 569 states and 703 transitions. Word has length 175 [2020-09-04 16:33:41,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 16:33:41,146 INFO L479 AbstractCegarLoop]: Abstraction has 569 states and 703 transitions. [2020-09-04 16:33:41,146 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-04 16:33:41,146 INFO L276 IsEmpty]: Start isEmpty. Operand 569 states and 703 transitions. [2020-09-04 16:33:41,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2020-09-04 16:33:41,149 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 16:33:41,149 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] [2020-09-04 16:33:41,149 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-04 16:33:41,150 INFO L427 AbstractCegarLoop]: === Iteration 5 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 16:33:41,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 16:33:41,150 INFO L82 PathProgramCache]: Analyzing trace with hash -312164926, now seen corresponding path program 1 times [2020-09-04 16:33:41,150 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 16:33:41,151 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1307416016] [2020-09-04 16:33:41,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 16:33:41,176 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 16:33:41,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:33:41,261 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 16:33:41,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:33:41,324 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 16:33:41,325 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1307416016] [2020-09-04 16:33:41,325 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 16:33:41,325 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-04 16:33:41,325 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987153758] [2020-09-04 16:33:41,326 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-04 16:33:41,326 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 16:33:41,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-04 16:33:41,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-04 16:33:41,327 INFO L87 Difference]: Start difference. First operand 569 states and 703 transitions. Second operand 3 states. [2020-09-04 16:33:41,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 16:33:41,550 INFO L93 Difference]: Finished difference Result 1382 states and 1775 transitions. [2020-09-04 16:33:41,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-04 16:33:41,551 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 197 [2020-09-04 16:33:41,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 16:33:41,561 INFO L225 Difference]: With dead ends: 1382 [2020-09-04 16:33:41,561 INFO L226 Difference]: Without dead ends: 969 [2020-09-04 16:33:41,563 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 [2020-09-04 16:33:41,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 969 states. [2020-09-04 16:33:41,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 969 to 967. [2020-09-04 16:33:41,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 967 states. [2020-09-04 16:33:41,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 967 states to 967 states and 1221 transitions. [2020-09-04 16:33:41,688 INFO L78 Accepts]: Start accepts. Automaton has 967 states and 1221 transitions. Word has length 197 [2020-09-04 16:33:41,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 16:33:41,689 INFO L479 AbstractCegarLoop]: Abstraction has 967 states and 1221 transitions. [2020-09-04 16:33:41,690 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-04 16:33:41,690 INFO L276 IsEmpty]: Start isEmpty. Operand 967 states and 1221 transitions. [2020-09-04 16:33:41,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2020-09-04 16:33:41,695 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 16:33:41,696 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] [2020-09-04 16:33:41,696 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-04 16:33:41,696 INFO L427 AbstractCegarLoop]: === Iteration 6 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 16:33:41,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 16:33:41,697 INFO L82 PathProgramCache]: Analyzing trace with hash -1190618208, now seen corresponding path program 1 times [2020-09-04 16:33:41,698 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 16:33:41,698 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [255808622] [2020-09-04 16:33:41,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 16:33:41,713 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 16:33:41,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:33:41,820 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 16:33:41,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:33:41,867 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 16:33:41,868 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [255808622] [2020-09-04 16:33:41,870 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 16:33:41,870 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-04 16:33:41,871 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824774568] [2020-09-04 16:33:41,871 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-04 16:33:41,873 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 16:33:41,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-04 16:33:41,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-04 16:33:41,874 INFO L87 Difference]: Start difference. First operand 967 states and 1221 transitions. Second operand 3 states. [2020-09-04 16:33:42,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 16:33:42,266 INFO L93 Difference]: Finished difference Result 1889 states and 2467 transitions. [2020-09-04 16:33:42,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-04 16:33:42,267 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 198 [2020-09-04 16:33:42,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 16:33:42,273 INFO L225 Difference]: With dead ends: 1889 [2020-09-04 16:33:42,273 INFO L226 Difference]: Without dead ends: 1078 [2020-09-04 16:33:42,276 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 [2020-09-04 16:33:42,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1078 states. [2020-09-04 16:33:42,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1078 to 1062. [2020-09-04 16:33:42,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1062 states. [2020-09-04 16:33:42,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1062 states to 1062 states and 1334 transitions. [2020-09-04 16:33:42,379 INFO L78 Accepts]: Start accepts. Automaton has 1062 states and 1334 transitions. Word has length 198 [2020-09-04 16:33:42,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 16:33:42,380 INFO L479 AbstractCegarLoop]: Abstraction has 1062 states and 1334 transitions. [2020-09-04 16:33:42,380 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-04 16:33:42,380 INFO L276 IsEmpty]: Start isEmpty. Operand 1062 states and 1334 transitions. [2020-09-04 16:33:42,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2020-09-04 16:33:42,384 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 16:33:42,384 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] [2020-09-04 16:33:42,385 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-04 16:33:42,385 INFO L427 AbstractCegarLoop]: === Iteration 7 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 16:33:42,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 16:33:42,386 INFO L82 PathProgramCache]: Analyzing trace with hash 1815361344, now seen corresponding path program 1 times [2020-09-04 16:33:42,386 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 16:33:42,386 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [37987232] [2020-09-04 16:33:42,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 16:33:42,393 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 16:33:42,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:33:42,454 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 16:33:42,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:33:42,482 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 16:33:42,483 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [37987232] [2020-09-04 16:33:42,483 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 16:33:42,484 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-04 16:33:42,484 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951456597] [2020-09-04 16:33:42,484 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-04 16:33:42,485 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 16:33:42,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-04 16:33:42,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-04 16:33:42,485 INFO L87 Difference]: Start difference. First operand 1062 states and 1334 transitions. Second operand 3 states. [2020-09-04 16:33:42,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 16:33:42,888 INFO L93 Difference]: Finished difference Result 2052 states and 2632 transitions. [2020-09-04 16:33:42,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-04 16:33:42,888 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 198 [2020-09-04 16:33:42,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 16:33:42,896 INFO L225 Difference]: With dead ends: 2052 [2020-09-04 16:33:42,896 INFO L226 Difference]: Without dead ends: 1126 [2020-09-04 16:33:42,899 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 [2020-09-04 16:33:42,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1126 states. [2020-09-04 16:33:43,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1126 to 1093. [2020-09-04 16:33:43,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1093 states. [2020-09-04 16:33:43,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1093 states to 1093 states and 1379 transitions. [2020-09-04 16:33:43,063 INFO L78 Accepts]: Start accepts. Automaton has 1093 states and 1379 transitions. Word has length 198 [2020-09-04 16:33:43,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 16:33:43,064 INFO L479 AbstractCegarLoop]: Abstraction has 1093 states and 1379 transitions. [2020-09-04 16:33:43,064 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-04 16:33:43,064 INFO L276 IsEmpty]: Start isEmpty. Operand 1093 states and 1379 transitions. [2020-09-04 16:33:43,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2020-09-04 16:33:43,067 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 16:33:43,068 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] [2020-09-04 16:33:43,068 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-04 16:33:43,068 INFO L427 AbstractCegarLoop]: === Iteration 8 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 16:33:43,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 16:33:43,069 INFO L82 PathProgramCache]: Analyzing trace with hash 1252882748, now seen corresponding path program 1 times [2020-09-04 16:33:43,069 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 16:33:43,069 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [677259440] [2020-09-04 16:33:43,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 16:33:43,083 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 16:33:43,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:33:43,152 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 16:33:43,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:33:43,180 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 16:33:43,181 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [677259440] [2020-09-04 16:33:43,181 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 16:33:43,181 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-04 16:33:43,181 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611269874] [2020-09-04 16:33:43,182 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-04 16:33:43,182 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 16:33:43,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-04 16:33:43,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-04 16:33:43,183 INFO L87 Difference]: Start difference. First operand 1093 states and 1379 transitions. Second operand 3 states. [2020-09-04 16:33:43,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 16:33:43,325 INFO L93 Difference]: Finished difference Result 2050 states and 2622 transitions. [2020-09-04 16:33:43,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-04 16:33:43,326 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 207 [2020-09-04 16:33:43,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 16:33:43,332 INFO L225 Difference]: With dead ends: 2050 [2020-09-04 16:33:43,332 INFO L226 Difference]: Without dead ends: 1113 [2020-09-04 16:33:43,335 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 [2020-09-04 16:33:43,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1113 states. [2020-09-04 16:33:43,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1113 to 1111. [2020-09-04 16:33:43,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1111 states. [2020-09-04 16:33:43,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1111 states to 1111 states and 1399 transitions. [2020-09-04 16:33:43,434 INFO L78 Accepts]: Start accepts. Automaton has 1111 states and 1399 transitions. Word has length 207 [2020-09-04 16:33:43,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 16:33:43,435 INFO L479 AbstractCegarLoop]: Abstraction has 1111 states and 1399 transitions. [2020-09-04 16:33:43,435 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-04 16:33:43,435 INFO L276 IsEmpty]: Start isEmpty. Operand 1111 states and 1399 transitions. [2020-09-04 16:33:43,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2020-09-04 16:33:43,438 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 16:33:43,439 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] [2020-09-04 16:33:43,439 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-04 16:33:43,439 INFO L427 AbstractCegarLoop]: === Iteration 9 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 16:33:43,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 16:33:43,440 INFO L82 PathProgramCache]: Analyzing trace with hash -50860722, now seen corresponding path program 1 times [2020-09-04 16:33:43,440 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 16:33:43,440 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1584805205] [2020-09-04 16:33:43,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 16:33:43,449 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 16:33:43,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:33:43,525 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 16:33:43,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:33:43,582 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 16:33:43,582 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1584805205] [2020-09-04 16:33:43,583 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 16:33:43,583 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-04 16:33:43,588 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909233447] [2020-09-04 16:33:43,589 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-04 16:33:43,589 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 16:33:43,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-04 16:33:43,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-04 16:33:43,591 INFO L87 Difference]: Start difference. First operand 1111 states and 1399 transitions. Second operand 4 states. [2020-09-04 16:33:43,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 16:33:43,920 INFO L93 Difference]: Finished difference Result 2163 states and 2744 transitions. [2020-09-04 16:33:43,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-04 16:33:43,920 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 209 [2020-09-04 16:33:43,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 16:33:43,927 INFO L225 Difference]: With dead ends: 2163 [2020-09-04 16:33:43,928 INFO L226 Difference]: Without dead ends: 1208 [2020-09-04 16:33:43,930 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 [2020-09-04 16:33:43,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1208 states. [2020-09-04 16:33:44,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1208 to 1131. [2020-09-04 16:33:44,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1131 states. [2020-09-04 16:33:44,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1131 states to 1131 states and 1419 transitions. [2020-09-04 16:33:44,033 INFO L78 Accepts]: Start accepts. Automaton has 1131 states and 1419 transitions. Word has length 209 [2020-09-04 16:33:44,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 16:33:44,034 INFO L479 AbstractCegarLoop]: Abstraction has 1131 states and 1419 transitions. [2020-09-04 16:33:44,036 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-04 16:33:44,037 INFO L276 IsEmpty]: Start isEmpty. Operand 1131 states and 1419 transitions. [2020-09-04 16:33:44,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2020-09-04 16:33:44,041 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 16:33:44,041 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] [2020-09-04 16:33:44,041 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-04 16:33:44,042 INFO L427 AbstractCegarLoop]: === Iteration 10 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 16:33:44,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 16:33:44,042 INFO L82 PathProgramCache]: Analyzing trace with hash 1999743939, now seen corresponding path program 1 times [2020-09-04 16:33:44,043 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 16:33:44,043 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [458129022] [2020-09-04 16:33:44,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 16:33:44,054 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 16:33:44,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:33:44,118 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 16:33:44,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:33:44,142 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 16:33:44,143 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [458129022] [2020-09-04 16:33:44,143 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 16:33:44,143 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-04 16:33:44,144 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739524144] [2020-09-04 16:33:44,144 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-04 16:33:44,144 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 16:33:44,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-04 16:33:44,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-04 16:33:44,145 INFO L87 Difference]: Start difference. First operand 1131 states and 1419 transitions. Second operand 3 states. [2020-09-04 16:33:44,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 16:33:44,541 INFO L93 Difference]: Finished difference Result 2295 states and 2960 transitions. [2020-09-04 16:33:44,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-04 16:33:44,542 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 211 [2020-09-04 16:33:44,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 16:33:44,550 INFO L225 Difference]: With dead ends: 2295 [2020-09-04 16:33:44,551 INFO L226 Difference]: Without dead ends: 1284 [2020-09-04 16:33:44,554 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 [2020-09-04 16:33:44,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1284 states. [2020-09-04 16:33:44,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1284 to 1207. [2020-09-04 16:33:44,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1207 states. [2020-09-04 16:33:44,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1207 states to 1207 states and 1529 transitions. [2020-09-04 16:33:44,671 INFO L78 Accepts]: Start accepts. Automaton has 1207 states and 1529 transitions. Word has length 211 [2020-09-04 16:33:44,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 16:33:44,672 INFO L479 AbstractCegarLoop]: Abstraction has 1207 states and 1529 transitions. [2020-09-04 16:33:44,672 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-04 16:33:44,672 INFO L276 IsEmpty]: Start isEmpty. Operand 1207 states and 1529 transitions. [2020-09-04 16:33:44,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2020-09-04 16:33:44,676 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 16:33:44,676 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] [2020-09-04 16:33:44,677 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-04 16:33:44,677 INFO L427 AbstractCegarLoop]: === Iteration 11 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 16:33:44,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 16:33:44,677 INFO L82 PathProgramCache]: Analyzing trace with hash 1941211029, now seen corresponding path program 1 times [2020-09-04 16:33:44,678 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 16:33:44,678 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1502780865] [2020-09-04 16:33:44,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 16:33:44,688 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 16:33:44,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:33:44,751 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 16:33:44,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:33:44,776 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 16:33:44,777 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1502780865] [2020-09-04 16:33:44,777 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 16:33:44,778 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-04 16:33:44,778 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437630472] [2020-09-04 16:33:44,778 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-04 16:33:44,778 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 16:33:44,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-04 16:33:44,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-04 16:33:44,779 INFO L87 Difference]: Start difference. First operand 1207 states and 1529 transitions. Second operand 4 states. [2020-09-04 16:33:45,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 16:33:45,379 INFO L93 Difference]: Finished difference Result 3413 states and 4441 transitions. [2020-09-04 16:33:45,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-04 16:33:45,380 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 216 [2020-09-04 16:33:45,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 16:33:45,392 INFO L225 Difference]: With dead ends: 3413 [2020-09-04 16:33:45,392 INFO L226 Difference]: Without dead ends: 2338 [2020-09-04 16:33:45,396 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 [2020-09-04 16:33:45,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2338 states. [2020-09-04 16:33:45,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2338 to 1243. [2020-09-04 16:33:45,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1243 states. [2020-09-04 16:33:45,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1243 states to 1243 states and 1583 transitions. [2020-09-04 16:33:45,569 INFO L78 Accepts]: Start accepts. Automaton has 1243 states and 1583 transitions. Word has length 216 [2020-09-04 16:33:45,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 16:33:45,569 INFO L479 AbstractCegarLoop]: Abstraction has 1243 states and 1583 transitions. [2020-09-04 16:33:45,569 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-04 16:33:45,570 INFO L276 IsEmpty]: Start isEmpty. Operand 1243 states and 1583 transitions. [2020-09-04 16:33:45,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2020-09-04 16:33:45,576 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 16:33:45,576 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] [2020-09-04 16:33:45,577 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-09-04 16:33:45,577 INFO L427 AbstractCegarLoop]: === Iteration 12 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 16:33:45,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 16:33:45,578 INFO L82 PathProgramCache]: Analyzing trace with hash -165389337, now seen corresponding path program 1 times [2020-09-04 16:33:45,578 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 16:33:45,578 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1464146926] [2020-09-04 16:33:45,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 16:33:45,586 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 16:33:45,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:33:45,672 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 16:33:45,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:33:45,719 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 16:33:45,720 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1464146926] [2020-09-04 16:33:45,720 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 16:33:45,720 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-04 16:33:45,720 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465718679] [2020-09-04 16:33:45,721 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-04 16:33:45,721 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 16:33:45,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-04 16:33:45,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-04 16:33:45,722 INFO L87 Difference]: Start difference. First operand 1243 states and 1583 transitions. Second operand 3 states. [2020-09-04 16:33:45,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 16:33:45,940 INFO L93 Difference]: Finished difference Result 2889 states and 3745 transitions. [2020-09-04 16:33:45,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-04 16:33:45,940 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 232 [2020-09-04 16:33:45,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 16:33:45,950 INFO L225 Difference]: With dead ends: 2889 [2020-09-04 16:33:45,950 INFO L226 Difference]: Without dead ends: 1802 [2020-09-04 16:33:45,954 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 [2020-09-04 16:33:45,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1802 states. [2020-09-04 16:33:46,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1802 to 1800. [2020-09-04 16:33:46,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1800 states. [2020-09-04 16:33:46,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1800 states to 1800 states and 2315 transitions. [2020-09-04 16:33:46,106 INFO L78 Accepts]: Start accepts. Automaton has 1800 states and 2315 transitions. Word has length 232 [2020-09-04 16:33:46,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 16:33:46,107 INFO L479 AbstractCegarLoop]: Abstraction has 1800 states and 2315 transitions. [2020-09-04 16:33:46,107 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-04 16:33:46,107 INFO L276 IsEmpty]: Start isEmpty. Operand 1800 states and 2315 transitions. [2020-09-04 16:33:46,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2020-09-04 16:33:46,112 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 16:33:46,113 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] [2020-09-04 16:33:46,113 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-09-04 16:33:46,113 INFO L427 AbstractCegarLoop]: === Iteration 13 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 16:33:46,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 16:33:46,114 INFO L82 PathProgramCache]: Analyzing trace with hash -662598379, now seen corresponding path program 1 times [2020-09-04 16:33:46,114 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 16:33:46,114 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1686618629] [2020-09-04 16:33:46,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 16:33:46,121 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 16:33:46,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:33:46,201 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 16:33:46,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:33:46,283 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 16:33:46,284 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1686618629] [2020-09-04 16:33:46,284 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 16:33:46,284 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-04 16:33:46,284 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275178478] [2020-09-04 16:33:46,285 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-04 16:33:46,285 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 16:33:46,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-04 16:33:46,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-04 16:33:46,285 INFO L87 Difference]: Start difference. First operand 1800 states and 2315 transitions. Second operand 4 states. [2020-09-04 16:33:47,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 16:33:47,002 INFO L93 Difference]: Finished difference Result 5166 states and 6784 transitions. [2020-09-04 16:33:47,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-04 16:33:47,002 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 244 [2020-09-04 16:33:47,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 16:33:47,024 INFO L225 Difference]: With dead ends: 5166 [2020-09-04 16:33:47,025 INFO L226 Difference]: Without dead ends: 3522 [2020-09-04 16:33:47,033 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 [2020-09-04 16:33:47,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3522 states. [2020-09-04 16:33:47,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3522 to 1809. [2020-09-04 16:33:47,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1809 states. [2020-09-04 16:33:47,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1809 states to 1809 states and 2324 transitions. [2020-09-04 16:33:47,212 INFO L78 Accepts]: Start accepts. Automaton has 1809 states and 2324 transitions. Word has length 244 [2020-09-04 16:33:47,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 16:33:47,213 INFO L479 AbstractCegarLoop]: Abstraction has 1809 states and 2324 transitions. [2020-09-04 16:33:47,213 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-04 16:33:47,213 INFO L276 IsEmpty]: Start isEmpty. Operand 1809 states and 2324 transitions. [2020-09-04 16:33:47,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2020-09-04 16:33:47,219 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 16:33:47,219 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] [2020-09-04 16:33:47,219 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-09-04 16:33:47,219 INFO L427 AbstractCegarLoop]: === Iteration 14 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 16:33:47,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 16:33:47,220 INFO L82 PathProgramCache]: Analyzing trace with hash 435015861, now seen corresponding path program 1 times [2020-09-04 16:33:47,220 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 16:33:47,220 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1255518200] [2020-09-04 16:33:47,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 16:33:47,227 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 16:33:47,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:33:47,297 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 16:33:47,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:33:47,352 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 16:33:47,353 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1255518200] [2020-09-04 16:33:47,353 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 16:33:47,353 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-04 16:33:47,353 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583713052] [2020-09-04 16:33:47,354 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-04 16:33:47,354 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 16:33:47,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-04 16:33:47,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-04 16:33:47,355 INFO L87 Difference]: Start difference. First operand 1809 states and 2324 transitions. Second operand 4 states. [2020-09-04 16:33:47,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 16:33:47,985 INFO L93 Difference]: Finished difference Result 5214 states and 6800 transitions. [2020-09-04 16:33:47,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-04 16:33:47,986 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 244 [2020-09-04 16:33:47,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 16:33:48,003 INFO L225 Difference]: With dead ends: 5214 [2020-09-04 16:33:48,004 INFO L226 Difference]: Without dead ends: 3537 [2020-09-04 16:33:48,009 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 [2020-09-04 16:33:48,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3537 states. [2020-09-04 16:33:48,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3537 to 1849. [2020-09-04 16:33:48,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1849 states. [2020-09-04 16:33:48,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1849 states to 1849 states and 2386 transitions. [2020-09-04 16:33:48,215 INFO L78 Accepts]: Start accepts. Automaton has 1849 states and 2386 transitions. Word has length 244 [2020-09-04 16:33:48,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 16:33:48,215 INFO L479 AbstractCegarLoop]: Abstraction has 1849 states and 2386 transitions. [2020-09-04 16:33:48,216 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-04 16:33:48,216 INFO L276 IsEmpty]: Start isEmpty. Operand 1849 states and 2386 transitions. [2020-09-04 16:33:48,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2020-09-04 16:33:48,222 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 16:33:48,223 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] [2020-09-04 16:33:48,223 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-09-04 16:33:48,223 INFO L427 AbstractCegarLoop]: === Iteration 15 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 16:33:48,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 16:33:48,224 INFO L82 PathProgramCache]: Analyzing trace with hash -173027549, now seen corresponding path program 1 times [2020-09-04 16:33:48,224 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 16:33:48,224 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2004302733] [2020-09-04 16:33:48,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 16:33:48,233 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 16:33:48,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:33:48,337 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 16:33:48,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:33:48,435 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 16:33:48,436 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2004302733] [2020-09-04 16:33:48,436 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 16:33:48,436 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-04 16:33:48,437 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811850202] [2020-09-04 16:33:48,437 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-04 16:33:48,437 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 16:33:48,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-04 16:33:48,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-04 16:33:48,438 INFO L87 Difference]: Start difference. First operand 1849 states and 2386 transitions. Second operand 4 states. [2020-09-04 16:33:49,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 16:33:49,130 INFO L93 Difference]: Finished difference Result 4492 states and 5930 transitions. [2020-09-04 16:33:49,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-04 16:33:49,130 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 247 [2020-09-04 16:33:49,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 16:33:49,144 INFO L225 Difference]: With dead ends: 4492 [2020-09-04 16:33:49,145 INFO L226 Difference]: Without dead ends: 2769 [2020-09-04 16:33:49,151 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 [2020-09-04 16:33:49,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2769 states. [2020-09-04 16:33:49,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2769 to 1400. [2020-09-04 16:33:49,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1400 states. [2020-09-04 16:33:49,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1400 states to 1400 states and 1741 transitions. [2020-09-04 16:33:49,311 INFO L78 Accepts]: Start accepts. Automaton has 1400 states and 1741 transitions. Word has length 247 [2020-09-04 16:33:49,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 16:33:49,312 INFO L479 AbstractCegarLoop]: Abstraction has 1400 states and 1741 transitions. [2020-09-04 16:33:49,312 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-04 16:33:49,312 INFO L276 IsEmpty]: Start isEmpty. Operand 1400 states and 1741 transitions. [2020-09-04 16:33:49,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2020-09-04 16:33:49,315 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 16:33:49,316 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] [2020-09-04 16:33:49,316 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-09-04 16:33:49,317 INFO L427 AbstractCegarLoop]: === Iteration 16 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 16:33:49,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 16:33:49,317 INFO L82 PathProgramCache]: Analyzing trace with hash -196875119, now seen corresponding path program 1 times [2020-09-04 16:33:49,317 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 16:33:49,318 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2111178552] [2020-09-04 16:33:49,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 16:33:49,324 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 16:33:49,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-04 16:33:49,373 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-09-04 16:33:49,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-04 16:33:49,414 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-09-04 16:33:49,542 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-04 16:33:49,542 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-04 16:33:49,543 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-09-04 16:33:49,599 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.09 04:33:49 BoogieIcfgContainer [2020-09-04 16:33:49,599 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-04 16:33:49,604 INFO L168 Benchmark]: Toolchain (without parser) took 13414.54 ms. Allocated memory was 139.5 MB in the beginning and 616.0 MB in the end (delta: 476.6 MB). Free memory was 103.2 MB in the beginning and 195.8 MB in the end (delta: -92.6 MB). Peak memory consumption was 384.0 MB. Max. memory is 7.1 GB. [2020-09-04 16:33:49,605 INFO L168 Benchmark]: CDTParser took 0.99 ms. Allocated memory is still 139.5 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-04 16:33:49,607 INFO L168 Benchmark]: CACSL2BoogieTranslator took 567.37 ms. Allocated memory was 139.5 MB in the beginning and 203.4 MB in the end (delta: 64.0 MB). Free memory was 103.0 MB in the beginning and 178.4 MB in the end (delta: -75.5 MB). Peak memory consumption was 26.7 MB. Max. memory is 7.1 GB. [2020-09-04 16:33:49,615 INFO L168 Benchmark]: Boogie Preprocessor took 72.54 ms. Allocated memory is still 203.4 MB. Free memory was 178.4 MB in the beginning and 175.4 MB in the end (delta: 3.1 MB). Peak memory consumption was 3.1 MB. Max. memory is 7.1 GB. [2020-09-04 16:33:49,615 INFO L168 Benchmark]: RCFGBuilder took 1067.70 ms. Allocated memory is still 203.4 MB. Free memory was 175.4 MB in the beginning and 102.3 MB in the end (delta: 73.1 MB). Peak memory consumption was 73.1 MB. Max. memory is 7.1 GB. [2020-09-04 16:33:49,616 INFO L168 Benchmark]: TraceAbstraction took 11700.89 ms. Allocated memory was 203.4 MB in the beginning and 616.0 MB in the end (delta: 412.6 MB). Free memory was 101.6 MB in the beginning and 195.8 MB in the end (delta: -94.1 MB). Peak memory consumption was 318.5 MB. Max. memory is 7.1 GB. [2020-09-04 16:33:49,625 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.99 ms. Allocated memory is still 139.5 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 567.37 ms. Allocated memory was 139.5 MB in the beginning and 203.4 MB in the end (delta: 64.0 MB). Free memory was 103.0 MB in the beginning and 178.4 MB in the end (delta: -75.5 MB). Peak memory consumption was 26.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 72.54 ms. Allocated memory is still 203.4 MB. Free memory was 178.4 MB in the beginning and 175.4 MB in the end (delta: 3.1 MB). Peak memory consumption was 3.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 1067.70 ms. Allocated memory is still 203.4 MB. Free memory was 175.4 MB in the beginning and 102.3 MB in the end (delta: 73.1 MB). Peak memory consumption was 73.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 11700.89 ms. Allocated memory was 203.4 MB in the beginning and 616.0 MB in the end (delta: 412.6 MB). Free memory was 101.6 MB in the beginning and 195.8 MB in the end (delta: -94.1 MB). Peak memory consumption was 318.5 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: 11.5s, OverallIterations: 16, TraceHistogramMax: 4, AutomataDifference: 6.4s, 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, 2.6s 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: 1.9s 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...